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doc-exports/docs/css/umn/css_01_0066.html
zhengxiu 93d856d5c5 css umn 25.6.0 version 
Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com>
Co-authored-by: zhengxiu <zhengxiu@huawei.com>
Co-committed-by: zhengxiu <zhengxiu@huawei.com>
2025-11-25 11:34:43 +00:00

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<a name="EN-US_TOPIC_0000001972416125"></a><a name="EN-US_TOPIC_0000001972416125"></a>
<h1 class="topictitle1">Accessing an Elasticsearch Cluster Through the Low Level REST Client</h1>
<div id="body8662426"><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_p1960762510163">The high-level client is encapsulated based on the low-level client. If the method calls (such as <strong id="EN-US_TOPIC_0000001972416125__b124945010533">.search</strong> and <strong id="EN-US_TOPIC_0000001972416125__b1952115795318">.bulk</strong>) in the high-level client cannot meet the requirements or has compatibility issues, you can use the low-level client. You can even use <strong id="EN-US_TOPIC_0000001972416125__b12905175213499">HighLevelClient.getLowLevelClient()</strong> to directly obtain the low-level client. A low-level client allows you to customize the request structure, which is more flexible and supports all the request formats of Elasticsearch, such as GET, POST, DELETE, and HEAD.</p>
<p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_p173131359936">This section describes how to use the Low Level REST Client to access the CSS cluster. The methods are as follows. For each method, you can directly create a REST low-level client, or create a high-level client and then invoke getLowLevelClient() to obtain a low-level client.</p>
<ul id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_ul18513748121316"><li id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_li19513134810130"><a href="#EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_section11903524419">Connecting to a Non-Security Cluster Through the Low Level REST Client</a>: suitable for clusters using non-security mode</li><li id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_li155131348181318"><a href="#EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_section115491950202410">Connecting to a Security-Mode Cluster Through Low Level REST Client (Without a Security Certificate)</a>: suitable for clusters in security mode+HTTP, and for clusters in security mode+HTTPS (without using certificates)</li><li id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_li0513124814132"><a href="#EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_section1684712173252">Connecting to a Security-Mode Cluster Through Low Level REST Client (With a Security Certificate)</a>: suitable for clusters in security mode+HTTPS</li></ul>
<div class="section" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_section8901858739"><h4 class="sectiontitle">Precautions</h4><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_p046241342">The Low Level REST Client version should match the Elasticsearch version. For example, use Low Level REST Client 7.6.2 to access the Elasticsearch 7.6.2 cluster.</p>
</div>
<div class="section" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_section4509421174413"><h4 class="sectiontitle">Prerequisites</h4><ul id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_ul115524012184"><li id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_li181191829144220">The CSS cluster is available.</li><li id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_li578832518434">Ensure that the server running Java can communicate with the CSS cluster.</li><li id="EN-US_TOPIC_0000001972416125__li578832518434">Depending on the network configuration method used, obtain the cluster access address. For details, see <a href="css_01_0190.html#EN-US_TOPIC_0000001975823337__section855085010198">Network Configuration</a>.</li><li id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_li551945111016">Install JDK 1.8 on the server. You can download JDK 1.8 from: <a href="https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html" target="_blank" rel="noopener noreferrer">https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html</a></li><li id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_li16338204624414">Declare the Apache version in Maven mode. The following code uses version 7.6.2 as an example.<p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_p944674119185"><a name="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_li16338204624414"></a><a name="en-us_topic_0000001934179694_li16338204624414"></a><em id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_i553242994414">7.6.2</em> indicates the version of the Elasticsearch Java client.</p>
<pre class="screen" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_screen83381646164416">&lt;dependency&gt;
&lt;groupId&gt;org.elasticsearch.client&lt;/groupId&gt;
&lt;artifactId&gt;elasticsearch-rest-client&lt;/artifactId&gt;
&lt;version&gt;<i><span class="varname" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_varname1413072333318">7.6.2</span></i>&lt;/version&gt;
&lt;/dependency&gt;
&lt;dependency&gt;
&lt;groupId&gt;org.elasticsearch&lt;/groupId&gt;
&lt;artifactId&gt;elasticsearch&lt;/artifactId&gt;
&lt;version&gt;<i><span class="varname" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_varname329882613314">7.6.2</span></i>&lt;/version&gt;
&lt;/dependency&gt;</pre>
</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_section11903524419"><a name="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_section11903524419"></a><a name="en-us_topic_0000001934179694_section11903524419"></a><h4 class="sectiontitle">Connecting to a Non-Security Cluster Through the Low Level REST Client</h4><ul id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_ul1062515993714"><li id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_li762539143713"><strong id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_b912313419468">Method 1: Directly create a Low Level REST Client.</strong><div class="codecoloring" codetype="Java" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_screen128423375368"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal"> 1</span>
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<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.Request</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.Response</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.RestClient</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.RestClientBuilder</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.io.IOException</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.util.Arrays</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.util.List</span><span class="p">;</span>
<span class="kd">public</span><span class="w"> </span><span class="kd">class</span> <span class="nc">Main</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">main</span><span class="p">(</span><span class="n">String</span><span class="o">[]</span><span class="w"> </span><span class="n">args</span><span class="p">)</span><span class="w"> </span><span class="kd">throws</span><span class="w"> </span><span class="n">IOException</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">List</span><span class="o">&lt;</span><span class="n">String</span><span class="o">&gt;</span><span class="w"> </span><span class="n">host</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">Arrays</span><span class="p">.</span><span class="na">asList</span><span class="p">(</span><span class="s">&quot;xxx.xxx.xxx.xxx&quot;</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;xxx.xxx.xxx.xxx&quot;</span><span class="p">);</span>
<span class="w"> </span><span class="n">RestClientBuilder</span><span class="w"> </span><span class="n">builder</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">RestClient</span><span class="p">.</span><span class="na">builder</span><span class="p">(</span><span class="n">constructHttpHosts</span><span class="p">(</span><span class="n">host</span><span class="p">,</span><span class="w"> </span><span class="mi">9200</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;http&quot;</span><span class="p">));</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * Create a Low Level REST Client.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="n">RestClient</span><span class="w"> </span><span class="n">lowLevelClient</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">builder</span><span class="p">.</span><span class="na">build</span><span class="p">();</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * Check whether the test index exists. If the index exists, 200 is returned. If the index does not exist, 404 is returned.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="n">Request</span><span class="w"> </span><span class="n">request</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">Request</span><span class="p">(</span><span class="s">&quot;HEAD&quot;</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;/test&quot;</span><span class="p">);</span>
<span class="w"> </span><span class="n">Response</span><span class="w"> </span><span class="n">response</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">lowLevelClient</span><span class="p">.</span><span class="na">performRequest</span><span class="p">(</span><span class="n">request</span><span class="p">);</span>
<span class="w"> </span><span class="n">System</span><span class="p">.</span><span class="na">out</span><span class="p">.</span><span class="na">println</span><span class="p">(</span><span class="n">response</span><span class="p">.</span><span class="na">getStatusLine</span><span class="p">().</span><span class="na">getStatusCode</span><span class="p">());</span>
<span class="w"> </span><span class="n">lowLevelClient</span><span class="p">.</span><span class="na">close</span><span class="p">();</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * Use the constructHttpHosts function to convert the node IP address list of the host cluster.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="n">HttpHost</span><span class="o">[]</span><span class="w"> </span><span class="nf">constructHttpHosts</span><span class="p">(</span><span class="n">List</span><span class="o">&lt;</span><span class="n">String</span><span class="o">&gt;</span><span class="w"> </span><span class="n">host</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">port</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">protocol</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">host</span><span class="p">.</span><span class="na">stream</span><span class="p">().</span><span class="na">map</span><span class="p">(</span><span class="n">p</span><span class="w"> </span><span class="o">-&gt;</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">HttpHost</span><span class="p">(</span><span class="n">p</span><span class="p">,</span><span class="w"> </span><span class="n">port</span><span class="p">,</span><span class="w"> </span><span class="n">protocol</span><span class="p">)).</span><span class="na">toArray</span><span class="p">(</span><span class="n">HttpHost</span><span class="o">[]</span><span class="p">::</span><span class="k">new</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span>
<span class="p">}</span>
</pre></div></td></tr></table></div>
</div>
</li><li id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_li1810182816379"><strong id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_b1805162517482">Method 2: Create a high-level client and then call getLowLevelClient() to obtain a low-level client.</strong><div class="codecoloring" codetype="Java" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_screen1977414017392"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal"> 1</span>
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<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.Request</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.Response</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.RestClient</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.RestClientBuilder</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.RestHighLevelClient</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.io.IOException</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.util.Arrays</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.util.List</span><span class="p">;</span>
<span class="kd">public</span><span class="w"> </span><span class="kd">class</span> <span class="nc">Main</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">main</span><span class="p">(</span><span class="n">String</span><span class="o">[]</span><span class="w"> </span><span class="n">args</span><span class="p">)</span><span class="w"> </span><span class="kd">throws</span><span class="w"> </span><span class="n">IOException</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">List</span><span class="o">&lt;</span><span class="n">String</span><span class="o">&gt;</span><span class="w"> </span><span class="n">host</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">Arrays</span><span class="p">.</span><span class="na">asList</span><span class="p">(</span><span class="s">&quot;xxx.xxx.xxx.xxx&quot;</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;xxx.xxx.xxx.xxx&quot;</span><span class="p">);</span>
<span class="w"> </span><span class="n">RestClientBuilder</span><span class="w"> </span><span class="n">builder</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">RestClient</span><span class="p">.</span><span class="na">builder</span><span class="p">(</span><span class="n">constructHttpHosts</span><span class="p">(</span><span class="n">host</span><span class="p">,</span><span class="w"> </span><span class="mi">9200</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;http&quot;</span><span class="p">));</span>
<span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">RestHighLevelClient</span><span class="w"> </span><span class="n">restHighLevelClient</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">RestHighLevelClient</span><span class="p">(</span><span class="n">builder</span><span class="p">);</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * Create a high-level client and then call getLowLevelClient() to obtain a low-level client. The code differs from the client creation code only in the following line:</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">RestClient</span><span class="w"> </span><span class="n">lowLevelClient</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">restHighLevelClient</span><span class="p">.</span><span class="na">getLowLevelClient</span><span class="p">();</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * Check whether the test index exists. If the index exists, 200 is returned. If the index does not exist, 404 is returned.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="n">Request</span><span class="w"> </span><span class="n">request</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">Request</span><span class="p">(</span><span class="s">&quot;HEAD&quot;</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;/test&quot;</span><span class="p">);</span>
<span class="w"> </span><span class="n">Response</span><span class="w"> </span><span class="n">response</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">lowLevelClient</span><span class="p">.</span><span class="na">performRequest</span><span class="p">(</span><span class="n">request</span><span class="p">);</span>
<span class="w"> </span><span class="n">System</span><span class="p">.</span><span class="na">out</span><span class="p">.</span><span class="na">println</span><span class="p">(</span><span class="n">response</span><span class="p">.</span><span class="na">getStatusLine</span><span class="p">().</span><span class="na">getStatusCode</span><span class="p">());</span>
<span class="w"> </span><span class="n">lowLevelClient</span><span class="p">.</span><span class="na">close</span><span class="p">();</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * Use the constructHttpHosts function to convert the node IP address list of the host cluster.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="n">HttpHost</span><span class="o">[]</span><span class="w"> </span><span class="nf">constructHttpHosts</span><span class="p">(</span><span class="n">List</span><span class="o">&lt;</span><span class="n">String</span><span class="o">&gt;</span><span class="w"> </span><span class="n">host</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">port</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">protocol</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">host</span><span class="p">.</span><span class="na">stream</span><span class="p">().</span><span class="na">map</span><span class="p">(</span><span class="n">p</span><span class="w"> </span><span class="o">-&gt;</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">HttpHost</span><span class="p">(</span><span class="n">p</span><span class="p">,</span><span class="w"> </span><span class="n">port</span><span class="p">,</span><span class="w"> </span><span class="n">protocol</span><span class="p">)).</span><span class="na">toArray</span><span class="p">(</span><span class="n">HttpHost</span><span class="o">[]</span><span class="p">::</span><span class="k">new</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span>
<span class="p">}</span>
</pre></div></td></tr></table></div>
</div>
</li></ul>
<p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_p65215915299"><em id="EN-US_TOPIC_0000001972416125__i66184110582">host</em> indicates the IP address of the cluster. If there are multiple IP addresses, separate them using commas (,). <em id="EN-US_TOPIC_0000001972416125__i17619131118583">test</em> indicates the index name to be queried.</p>
</div>
<div class="section" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_section115491950202410"><a name="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_section115491950202410"></a><a name="en-us_topic_0000001934179694_section115491950202410"></a><h4 class="sectiontitle">Connecting to a Security-Mode Cluster Through Low Level REST Client (Without a Security Certificate)</h4><ul id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_ul17543105472518"><li id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_li195431549251"><strong id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_b89561281512">Method 1: Directly create a Low Level REST Client.</strong><div class="codecoloring" codetype="Java" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_screen1701191918518"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal"> 1</span>
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<span class="normal">192</span></pre></div></td><td class="code"><div><pre><span></span><span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.HttpHost</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.HttpResponse</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.auth.AuthScope</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.auth.UsernamePasswordCredentials</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.client.CredentialsProvider</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.impl.client.BasicCredentialsProvider</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.impl.client.DefaultConnectionKeepAliveStrategy</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.impl.nio.client.HttpAsyncClientBuilder</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.nio.conn.ssl.SSLIOSessionStrategy</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.protocol.HttpContext</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.logging.log4j.LogManager</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.logging.log4j.Logger</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.Request</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.Response</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.RestClient</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.RestClientBuilder</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.common.Nullable</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.io.IOException</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.security.KeyManagementException</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.security.NoSuchAlgorithmException</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.security.SecureRandom</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.security.cert.CertificateException</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.security.cert.X509Certificate</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.util.Arrays</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.util.List</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.util.Objects</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.util.concurrent.TimeUnit</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">javax.net.ssl.HostnameVerifier</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">javax.net.ssl.SSLContext</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">javax.net.ssl.SSLSession</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">javax.net.ssl.TrustManager</span><span class="p">;</span><span class="kn">import</span><span class="w"> </span><span class="nn">javax.net.ssl.X509TrustManager</span><span class="p">;</span>
<span class="kd">public</span><span class="w"> </span><span class="kd">class</span> <span class="nc">Main</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * Create a class for the client. Define the create function.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="n">RestClient</span><span class="w"> </span><span class="nf">create</span><span class="p">(</span><span class="n">List</span><span class="o">&lt;</span><span class="n">String</span><span class="o">&gt;</span><span class="w"> </span><span class="n">host</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">port</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">protocol</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">connectTimeout</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">connectionRequestTimeout</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">socketTimeout</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">username</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">password</span><span class="p">)</span><span class="w"> </span><span class="kd">throws</span><span class="w"> </span><span class="n">IOException</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">CredentialsProvider</span><span class="w"> </span><span class="n">credentialsProvider</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">BasicCredentialsProvider</span><span class="p">();</span>
<span class="w"> </span><span class="n">credentialsProvider</span><span class="p">.</span><span class="na">setCredentials</span><span class="p">(</span><span class="n">AuthScope</span><span class="p">.</span><span class="na">ANY</span><span class="p">,</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">UsernamePasswordCredentials</span><span class="p">(</span><span class="n">username</span><span class="p">,</span><span class="w"> </span><span class="n">password</span><span class="p">));</span>
<span class="w"> </span><span class="n">SSLContext</span><span class="w"> </span><span class="n">sc</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="kc">null</span><span class="p">;</span>
<span class="w"> </span><span class="k">try</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">sc</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">SSLContext</span><span class="p">.</span><span class="na">getInstance</span><span class="p">(</span><span class="s">&quot;SSL&quot;</span><span class="p">);</span>
<span class="w"> </span><span class="n">sc</span><span class="p">.</span><span class="na">init</span><span class="p">(</span><span class="kc">null</span><span class="p">,</span><span class="w"> </span><span class="n">trustAllCerts</span><span class="p">,</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">SecureRandom</span><span class="p">());</span>
<span class="w"> </span><span class="p">}</span><span class="w"> </span><span class="k">catch</span><span class="w"> </span><span class="p">(</span><span class="n">KeyManagementException</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">NoSuchAlgorithmException</span><span class="w"> </span><span class="n">e</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">e</span><span class="p">.</span><span class="na">printStackTrace</span><span class="p">();</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="n">SSLIOSessionStrategy</span><span class="w"> </span><span class="n">sessionStrategy</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">SSLIOSessionStrategy</span><span class="p">(</span><span class="n">sc</span><span class="p">,</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">NullHostNameVerifier</span><span class="p">());</span>
<span class="w"> </span><span class="n">SecuredHttpClientConfigCallback</span><span class="w"> </span><span class="n">httpClientConfigCallback</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">SecuredHttpClientConfigCallback</span><span class="p">(</span><span class="n">sessionStrategy</span><span class="p">,</span>
<span class="w"> </span><span class="n">credentialsProvider</span><span class="p">);</span>
<span class="w"> </span><span class="n">RestClientBuilder</span><span class="w"> </span><span class="n">builder</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">RestClient</span><span class="p">.</span><span class="na">builder</span><span class="p">(</span><span class="n">constructHttpHosts</span><span class="p">(</span><span class="n">host</span><span class="p">,</span><span class="w"> </span><span class="n">port</span><span class="p">,</span><span class="w"> </span><span class="n">protocol</span><span class="p">))</span>
<span class="w"> </span><span class="p">.</span><span class="na">setRequestConfigCallback</span><span class="p">(</span><span class="n">requestConfig</span><span class="w"> </span><span class="o">-&gt;</span><span class="w"> </span><span class="n">requestConfig</span><span class="p">.</span><span class="na">setConnectTimeout</span><span class="p">(</span><span class="n">connectTimeout</span><span class="p">)</span>
<span class="w"> </span><span class="p">.</span><span class="na">setConnectionRequestTimeout</span><span class="p">(</span><span class="n">connectionRequestTimeout</span><span class="p">)</span>
<span class="w"> </span><span class="p">.</span><span class="na">setSocketTimeout</span><span class="p">(</span><span class="n">socketTimeout</span><span class="p">))</span>
<span class="w"> </span><span class="p">.</span><span class="na">setHttpClientConfigCallback</span><span class="p">(</span><span class="n">httpClientConfigCallback</span><span class="p">);</span>
<span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">RestClient</span><span class="w"> </span><span class="n">client</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">builder</span><span class="p">.</span><span class="na">build</span><span class="p">();</span>
<span class="w"> </span><span class="n">logger</span><span class="p">.</span><span class="na">info</span><span class="p">(</span><span class="s">&quot;es rest client build success {} &quot;</span><span class="p">,</span><span class="w"> </span><span class="n">client</span><span class="p">);</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">client</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * Use the constructHttpHosts function to convert the node IP address list of the host cluster.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="n">HttpHost</span><span class="o">[]</span><span class="w"> </span><span class="nf">constructHttpHosts</span><span class="p">(</span><span class="n">List</span><span class="o">&lt;</span><span class="n">String</span><span class="o">&gt;</span><span class="w"> </span><span class="n">host</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">port</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">protocol</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">host</span><span class="p">.</span><span class="na">stream</span><span class="p">().</span><span class="na">map</span><span class="p">(</span><span class="n">p</span><span class="w"> </span><span class="o">-&gt;</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">HttpHost</span><span class="p">(</span><span class="n">p</span><span class="p">,</span><span class="w"> </span><span class="n">port</span><span class="p">,</span><span class="w"> </span><span class="n">protocol</span><span class="p">)).</span><span class="na">toArray</span><span class="p">(</span><span class="n">HttpHost</span><span class="o">[]</span><span class="p">::</span><span class="k">new</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * Configure trustAllCerts to ignore the certificate configuration.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="n">TrustManager</span><span class="o">[]</span><span class="w"> </span><span class="n">trustAllCerts</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">TrustManager</span><span class="o">[]</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">X509TrustManager</span><span class="p">()</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="nd">@Override</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">checkClientTrusted</span><span class="p">(</span><span class="n">X509Certificate</span><span class="o">[]</span><span class="w"> </span><span class="n">chain</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">authType</span><span class="p">)</span><span class="w"> </span><span class="kd">throws</span><span class="w"> </span><span class="n">CertificateException</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="nd">@Override</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">checkServerTrusted</span><span class="p">(</span><span class="n">X509Certificate</span><span class="o">[]</span><span class="w"> </span><span class="n">chain</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">authType</span><span class="p">)</span><span class="w"> </span><span class="kd">throws</span><span class="w"> </span><span class="n">CertificateException</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="nd">@Override</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="n">X509Certificate</span><span class="o">[]</span><span class="w"> </span><span class="nf">getAcceptedIssuers</span><span class="p">()</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="kc">null</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="p">};</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm">* The CustomConnectionKeepAliveStrategy function is used to set the connection keepalive time when there are a large number of short connections or when the number of data requests is small.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kd">class</span> <span class="nc">CustomConnectionKeepAliveStrategy</span><span class="w"> </span><span class="kd">extends</span><span class="w"> </span><span class="n">DefaultConnectionKeepAliveStrategy</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">CustomConnectionKeepAliveStrategy</span><span class="w"> </span><span class="n">INSTANCE</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">CustomConnectionKeepAliveStrategy</span><span class="p">();</span>
<span class="w"> </span><span class="kd">private</span><span class="w"> </span><span class="nf">CustomConnectionKeepAliveStrategy</span><span class="p">()</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="kd">super</span><span class="p">();</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * Maximum keepalive time (in minutes)</span>
<span class="cm"> * The default value is 10 minutes. You can set it based on the number of TCP connections in TIME_WAIT state. If there are too many TCP connections, you can increase the value.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="kd">private</span><span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="kt">long</span><span class="w"> </span><span class="n">MAX_KEEP_ALIVE_MINUTES</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">10</span><span class="p">;</span>
<span class="w"> </span><span class="nd">@Override</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kt">long</span><span class="w"> </span><span class="nf">getKeepAliveDuration</span><span class="p">(</span><span class="n">HttpResponse</span><span class="w"> </span><span class="n">response</span><span class="p">,</span><span class="w"> </span><span class="n">HttpContext</span><span class="w"> </span><span class="n">context</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="kt">long</span><span class="w"> </span><span class="n">keepAliveDuration</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="kd">super</span><span class="p">.</span><span class="na">getKeepAliveDuration</span><span class="p">(</span><span class="n">response</span><span class="p">,</span><span class="w"> </span><span class="n">context</span><span class="p">);</span>
<span class="w"> </span><span class="c1">// &lt;0 indicates an unlimited keepalive period.</span>
<span class="w"> </span><span class="c1">// Change the period from unlimited to a default period.</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">keepAliveDuration</span><span class="w"> </span><span class="o">&lt;</span><span class="w"> </span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">TimeUnit</span><span class="p">.</span><span class="na">MINUTES</span><span class="p">.</span><span class="na">toMillis</span><span class="p">(</span><span class="n">MAX_KEEP_ALIVE_MINUTES</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">keepAliveDuration</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="kd">private</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">Logger</span><span class="w"> </span><span class="n">logger</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">LogManager</span><span class="p">.</span><span class="na">getLogger</span><span class="p">(</span><span class="n">Main</span><span class="p">.</span><span class="na">class</span><span class="p">);</span>
<span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kd">class</span> <span class="nc">SecuredHttpClientConfigCallback</span><span class="w"> </span><span class="kd">implements</span><span class="w"> </span><span class="n">RestClientBuilder</span><span class="p">.</span><span class="na">HttpClientConfigCallback</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="nd">@Nullable</span>
<span class="w"> </span><span class="kd">private</span><span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">CredentialsProvider</span><span class="w"> </span><span class="n">credentialsProvider</span><span class="p">;</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * The {@link SSLIOSessionStrategy} for all requests to enable SSL / TLS encryption.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="kd">private</span><span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">SSLIOSessionStrategy</span><span class="w"> </span><span class="n">sslStrategy</span><span class="p">;</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * Create a new {@link SecuredHttpClientConfigCallback}.</span>
<span class="cm"> *</span>
<span class="cm"> * @param credentialsProvider The credential provider, if a username/password have been supplied</span>
<span class="cm"> * @param sslStrategy The SSL strategy, if SSL / TLS have been supplied</span>
<span class="cm"> * @throws NullPointerException if {@code sslStrategy} is {@code null}</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="n">SecuredHttpClientConfigCallback</span><span class="p">(</span><span class="kd">final</span><span class="w"> </span><span class="n">SSLIOSessionStrategy</span><span class="w"> </span><span class="n">sslStrategy</span><span class="p">,</span>
<span class="w"> </span><span class="nd">@Nullable</span><span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">CredentialsProvider</span><span class="w"> </span><span class="n">credentialsProvider</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">this</span><span class="p">.</span><span class="na">sslStrategy</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">Objects</span><span class="p">.</span><span class="na">requireNonNull</span><span class="p">(</span><span class="n">sslStrategy</span><span class="p">);</span>
<span class="w"> </span><span class="k">this</span><span class="p">.</span><span class="na">credentialsProvider</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">credentialsProvider</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * Get the {@link CredentialsProvider} that will be added to the HTTP client.</span>
<span class="cm"> *</span>
<span class="cm"> * @return Can be {@code null}.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="nd">@Nullable</span>
<span class="w"> </span><span class="n">CredentialsProvider</span><span class="w"> </span><span class="nf">getCredentialsProvider</span><span class="p">()</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">credentialsProvider</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * Get the {@link SSLIOSessionStrategy} that will be added to the HTTP client.</span>
<span class="cm"> *</span>
<span class="cm"> * @return Never {@code null}.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="n">SSLIOSessionStrategy</span><span class="w"> </span><span class="nf">getSSLStrategy</span><span class="p">()</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">sslStrategy</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * Sets the {@linkplain HttpAsyncClientBuilder#setDefaultCredentialsProvider(CredentialsProvider) credential provider},</span>
<span class="cm"> *</span>
<span class="cm"> * @param httpClientBuilder The client to configure.</span>
<span class="cm"> * @return Always {@code httpClientBuilder}.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="nd">@Override</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="n">HttpAsyncClientBuilder</span><span class="w"> </span><span class="nf">customizeHttpClient</span><span class="p">(</span><span class="kd">final</span><span class="w"> </span><span class="n">HttpAsyncClientBuilder</span><span class="w"> </span><span class="n">httpClientBuilder</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="c1">// enable SSL / TLS</span>
<span class="w"> </span><span class="n">httpClientBuilder</span><span class="p">.</span><span class="na">setSSLStrategy</span><span class="p">(</span><span class="n">sslStrategy</span><span class="p">);</span>
<span class="w"> </span><span class="c1">// enable user authentication</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">credentialsProvider</span><span class="w"> </span><span class="o">!=</span><span class="w"> </span><span class="kc">null</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">httpClientBuilder</span><span class="p">.</span><span class="na">setDefaultCredentialsProvider</span><span class="p">(</span><span class="n">credentialsProvider</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">httpClientBuilder</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kd">class</span> <span class="nc">NullHostNameVerifier</span><span class="w"> </span><span class="kd">implements</span><span class="w"> </span><span class="n">HostnameVerifier</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="nd">@Override</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kt">boolean</span><span class="w"> </span><span class="nf">verify</span><span class="p">(</span><span class="n">String</span><span class="w"> </span><span class="n">arg0</span><span class="p">,</span><span class="w"> </span><span class="n">SSLSession</span><span class="w"> </span><span class="n">arg1</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="kc">true</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * The following is an example of the main function. Call the create function to create a Low Level REST Client and check whether the test index exists.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">main</span><span class="p">(</span><span class="n">String</span><span class="o">[]</span><span class="w"> </span><span class="n">args</span><span class="p">)</span><span class="w"> </span><span class="kd">throws</span><span class="w"> </span><span class="n">IOException</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">RestClient</span><span class="w"> </span><span class="n">lowLevelClient</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">create</span><span class="p">(</span><span class="n">Arrays</span><span class="p">.</span><span class="na">asList</span><span class="p">(</span><span class="s">&quot;xxx.xxx.xxx.xxx&quot;</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;xxx.xxx.xxx.xxx&quot;</span><span class="p">),</span><span class="w"> </span><span class="mi">9200</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;http&quot;</span><span class="p">,</span><span class="w"> </span><span class="mi">1000</span><span class="p">,</span><span class="w"> </span><span class="mi">1000</span><span class="p">,</span><span class="w"> </span><span class="mi">1000</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;username&quot;</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;password&quot;</span><span class="p">);</span>
<span class="w"> </span><span class="n">Request</span><span class="w"> </span><span class="n">request</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">Request</span><span class="p">(</span><span class="s">&quot;HEAD&quot;</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;/test&quot;</span><span class="p">);</span>
<span class="w"> </span><span class="n">Response</span><span class="w"> </span><span class="n">response</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">lowLevelClient</span><span class="p">.</span><span class="na">performRequest</span><span class="p">(</span><span class="n">request</span><span class="p">);</span>
<span class="w"> </span><span class="n">System</span><span class="p">.</span><span class="na">out</span><span class="p">.</span><span class="na">println</span><span class="p">(</span><span class="n">response</span><span class="p">.</span><span class="na">getStatusLine</span><span class="p">().</span><span class="na">getStatusCode</span><span class="p">());</span>
<span class="w"> </span><span class="n">lowLevelClient</span><span class="p">.</span><span class="na">close</span><span class="p">();</span>
<span class="w"> </span><span class="p">}</span>
<span class="p">}</span>
</pre></div></td></tr></table></div>
</div>
</li><li id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_li185435543252"><strong id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_b136918177616">Method 2: Create a high-level client and then call getLowLevelClient() to obtain a low-level client.</strong><div class="codecoloring" codetype="Java" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_screen1754313547252"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal"> 1</span>
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<span class="normal">196</span></pre></div></td><td class="code"><div><pre><span></span><span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.HttpHost</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.HttpResponse</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.auth.AuthScope</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.auth.UsernamePasswordCredentials</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.client.CredentialsProvider</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.impl.client.BasicCredentialsProvider</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.impl.client.DefaultConnectionKeepAliveStrategy</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.impl.nio.client.HttpAsyncClientBuilder</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.nio.conn.ssl.SSLIOSessionStrategy</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.protocol.HttpContext</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.logging.log4j.LogManager</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.logging.log4j.Logger</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.Request</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.Response</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.RestClient</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.RestClientBuilder</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.common.Nullable</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.io.IOException</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.security.KeyManagementException</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.security.NoSuchAlgorithmException</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.security.SecureRandom</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.security.cert.CertificateException</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.security.cert.X509Certificate</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.util.Arrays</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.util.List</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.util.Objects</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.util.concurrent.TimeUnit</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">javax.net.ssl.HostnameVerifier</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">javax.net.ssl.SSLContext</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">javax.net.ssl.SSLSession</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">javax.net.ssl.TrustManager</span><span class="p">;</span><span class="kn">import</span><span class="w"> </span><span class="nn">javax.net.ssl.X509TrustManager</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.RestHighLevelClient</span><span class="p">;</span>
<span class="kd">public</span><span class="w"> </span><span class="kd">class</span> <span class="nc">Main13</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * Create a class for the client. Define the create function.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="n">RestHighLevelClient</span><span class="w"> </span><span class="nf">create</span><span class="p">(</span><span class="n">List</span><span class="o">&lt;</span><span class="n">String</span><span class="o">&gt;</span><span class="w"> </span><span class="n">host</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">port</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">protocol</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">connectTimeout</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">connectionRequestTimeout</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">socketTimeout</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">username</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">password</span><span class="p">)</span><span class="w"> </span><span class="kd">throws</span><span class="w"> </span><span class="n">IOException</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">CredentialsProvider</span><span class="w"> </span><span class="n">credentialsProvider</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">BasicCredentialsProvider</span><span class="p">();</span>
<span class="w"> </span><span class="n">credentialsProvider</span><span class="p">.</span><span class="na">setCredentials</span><span class="p">(</span><span class="n">AuthScope</span><span class="p">.</span><span class="na">ANY</span><span class="p">,</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">UsernamePasswordCredentials</span><span class="p">(</span><span class="n">username</span><span class="p">,</span><span class="w"> </span><span class="n">password</span><span class="p">));</span>
<span class="w"> </span><span class="n">SSLContext</span><span class="w"> </span><span class="n">sc</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="kc">null</span><span class="p">;</span>
<span class="w"> </span><span class="k">try</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">sc</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">SSLContext</span><span class="p">.</span><span class="na">getInstance</span><span class="p">(</span><span class="s">&quot;SSL&quot;</span><span class="p">);</span>
<span class="w"> </span><span class="n">sc</span><span class="p">.</span><span class="na">init</span><span class="p">(</span><span class="kc">null</span><span class="p">,</span><span class="w"> </span><span class="n">trustAllCerts</span><span class="p">,</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">SecureRandom</span><span class="p">());</span>
<span class="w"> </span><span class="p">}</span><span class="w"> </span><span class="k">catch</span><span class="w"> </span><span class="p">(</span><span class="n">KeyManagementException</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">NoSuchAlgorithmException</span><span class="w"> </span><span class="n">e</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">e</span><span class="p">.</span><span class="na">printStackTrace</span><span class="p">();</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="n">SSLIOSessionStrategy</span><span class="w"> </span><span class="n">sessionStrategy</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">SSLIOSessionStrategy</span><span class="p">(</span><span class="n">sc</span><span class="p">,</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">NullHostNameVerifier</span><span class="p">());</span>
<span class="w"> </span><span class="n">SecuredHttpClientConfigCallback</span><span class="w"> </span><span class="n">httpClientConfigCallback</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">SecuredHttpClientConfigCallback</span><span class="p">(</span><span class="n">sessionStrategy</span><span class="p">,</span>
<span class="w"> </span><span class="n">credentialsProvider</span><span class="p">);</span>
<span class="w"> </span><span class="n">RestClientBuilder</span><span class="w"> </span><span class="n">builder</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">RestClient</span><span class="p">.</span><span class="na">builder</span><span class="p">(</span><span class="n">constructHttpHosts</span><span class="p">(</span><span class="n">host</span><span class="p">,</span><span class="w"> </span><span class="n">port</span><span class="p">,</span><span class="w"> </span><span class="n">protocol</span><span class="p">))</span>
<span class="w"> </span><span class="p">.</span><span class="na">setRequestConfigCallback</span><span class="p">(</span><span class="n">requestConfig</span><span class="w"> </span><span class="o">-&gt;</span><span class="w"> </span><span class="n">requestConfig</span><span class="p">.</span><span class="na">setConnectTimeout</span><span class="p">(</span><span class="n">connectTimeout</span><span class="p">)</span>
<span class="w"> </span><span class="p">.</span><span class="na">setConnectionRequestTimeout</span><span class="p">(</span><span class="n">connectionRequestTimeout</span><span class="p">)</span>
<span class="w"> </span><span class="p">.</span><span class="na">setSocketTimeout</span><span class="p">(</span><span class="n">socketTimeout</span><span class="p">))</span>
<span class="w"> </span><span class="p">.</span><span class="na">setHttpClientConfigCallback</span><span class="p">(</span><span class="n">httpClientConfigCallback</span><span class="p">);</span>
<span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">RestHighLevelClient</span><span class="w"> </span><span class="n">client</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">RestHighLevelClient</span><span class="p">(</span><span class="n">builder</span><span class="p">);</span>
<span class="w"> </span><span class="n">logger</span><span class="p">.</span><span class="na">info</span><span class="p">(</span><span class="s">&quot;es rest client build success {} &quot;</span><span class="p">,</span><span class="w"> </span><span class="n">client</span><span class="p">);</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">client</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * Use the constructHttpHosts function to convert the node IP address list of the host cluster.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="n">HttpHost</span><span class="o">[]</span><span class="w"> </span><span class="nf">constructHttpHosts</span><span class="p">(</span><span class="n">List</span><span class="o">&lt;</span><span class="n">String</span><span class="o">&gt;</span><span class="w"> </span><span class="n">host</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">port</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">protocol</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">host</span><span class="p">.</span><span class="na">stream</span><span class="p">().</span><span class="na">map</span><span class="p">(</span><span class="n">p</span><span class="w"> </span><span class="o">-&gt;</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">HttpHost</span><span class="p">(</span><span class="n">p</span><span class="p">,</span><span class="w"> </span><span class="n">port</span><span class="p">,</span><span class="w"> </span><span class="n">protocol</span><span class="p">)).</span><span class="na">toArray</span><span class="p">(</span><span class="n">HttpHost</span><span class="o">[]</span><span class="p">::</span><span class="k">new</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * Configure trustAllCerts to ignore the certificate configuration.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="n">TrustManager</span><span class="o">[]</span><span class="w"> </span><span class="n">trustAllCerts</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">TrustManager</span><span class="o">[]</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">X509TrustManager</span><span class="p">()</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="nd">@Override</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">checkClientTrusted</span><span class="p">(</span><span class="n">X509Certificate</span><span class="o">[]</span><span class="w"> </span><span class="n">chain</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">authType</span><span class="p">)</span><span class="w"> </span><span class="kd">throws</span><span class="w"> </span><span class="n">CertificateException</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="nd">@Override</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">checkServerTrusted</span><span class="p">(</span><span class="n">X509Certificate</span><span class="o">[]</span><span class="w"> </span><span class="n">chain</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">authType</span><span class="p">)</span><span class="w"> </span><span class="kd">throws</span><span class="w"> </span><span class="n">CertificateException</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="nd">@Override</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="n">X509Certificate</span><span class="o">[]</span><span class="w"> </span><span class="nf">getAcceptedIssuers</span><span class="p">()</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="kc">null</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="p">};</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm">* The CustomConnectionKeepAliveStrategy function is used to set the connection keepalive time when there are a large number of short connections or when the number of data requests is small.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kd">class</span> <span class="nc">CustomConnectionKeepAliveStrategy</span><span class="w"> </span><span class="kd">extends</span><span class="w"> </span><span class="n">DefaultConnectionKeepAliveStrategy</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">CustomConnectionKeepAliveStrategy</span><span class="w"> </span><span class="n">INSTANCE</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">CustomConnectionKeepAliveStrategy</span><span class="p">();</span>
<span class="w"> </span><span class="kd">private</span><span class="w"> </span><span class="nf">CustomConnectionKeepAliveStrategy</span><span class="p">()</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="kd">super</span><span class="p">();</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * Maximum keepalive time (in minutes)</span>
<span class="cm"> * The default value is 10 minutes. You can set it based on the number of TCP connections in TIME_WAIT state. If there are too many TCP connections, you can increase the value.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="kd">private</span><span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="kt">long</span><span class="w"> </span><span class="n">MAX_KEEP_ALIVE_MINUTES</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">10</span><span class="p">;</span>
<span class="w"> </span><span class="nd">@Override</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kt">long</span><span class="w"> </span><span class="nf">getKeepAliveDuration</span><span class="p">(</span><span class="n">HttpResponse</span><span class="w"> </span><span class="n">response</span><span class="p">,</span><span class="w"> </span><span class="n">HttpContext</span><span class="w"> </span><span class="n">context</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="kt">long</span><span class="w"> </span><span class="n">keepAliveDuration</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="kd">super</span><span class="p">.</span><span class="na">getKeepAliveDuration</span><span class="p">(</span><span class="n">response</span><span class="p">,</span><span class="w"> </span><span class="n">context</span><span class="p">);</span>
<span class="w"> </span><span class="c1">// &lt;0 indicates an unlimited keepalive period.</span>
<span class="w"> </span><span class="c1">// Change the period from unlimited to a default period.</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">keepAliveDuration</span><span class="w"> </span><span class="o">&lt;</span><span class="w"> </span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">TimeUnit</span><span class="p">.</span><span class="na">MINUTES</span><span class="p">.</span><span class="na">toMillis</span><span class="p">(</span><span class="n">MAX_KEEP_ALIVE_MINUTES</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">keepAliveDuration</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="kd">private</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">Logger</span><span class="w"> </span><span class="n">logger</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">LogManager</span><span class="p">.</span><span class="na">getLogger</span><span class="p">(</span><span class="n">Main</span><span class="p">.</span><span class="na">class</span><span class="p">);</span>
<span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kd">class</span> <span class="nc">SecuredHttpClientConfigCallback</span><span class="w"> </span><span class="kd">implements</span><span class="w"> </span><span class="n">RestClientBuilder</span><span class="p">.</span><span class="na">HttpClientConfigCallback</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="nd">@Nullable</span>
<span class="w"> </span><span class="kd">private</span><span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">CredentialsProvider</span><span class="w"> </span><span class="n">credentialsProvider</span><span class="p">;</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * The {@link SSLIOSessionStrategy} for all requests to enable SSL / TLS encryption.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="kd">private</span><span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">SSLIOSessionStrategy</span><span class="w"> </span><span class="n">sslStrategy</span><span class="p">;</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * Create a new {@link SecuredHttpClientConfigCallback}.</span>
<span class="cm"> *</span>
<span class="cm"> * @param credentialsProvider The credential provider, if a username/password have been supplied</span>
<span class="cm"> * @param sslStrategy The SSL strategy, if SSL / TLS have been supplied</span>
<span class="cm"> * @throws NullPointerException if {@code sslStrategy} is {@code null}</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="n">SecuredHttpClientConfigCallback</span><span class="p">(</span><span class="kd">final</span><span class="w"> </span><span class="n">SSLIOSessionStrategy</span><span class="w"> </span><span class="n">sslStrategy</span><span class="p">,</span>
<span class="w"> </span><span class="nd">@Nullable</span><span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">CredentialsProvider</span><span class="w"> </span><span class="n">credentialsProvider</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">this</span><span class="p">.</span><span class="na">sslStrategy</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">Objects</span><span class="p">.</span><span class="na">requireNonNull</span><span class="p">(</span><span class="n">sslStrategy</span><span class="p">);</span>
<span class="w"> </span><span class="k">this</span><span class="p">.</span><span class="na">credentialsProvider</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">credentialsProvider</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * Get the {@link CredentialsProvider} that will be added to the HTTP client.</span>
<span class="cm"> *</span>
<span class="cm"> * @return Can be {@code null}.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="nd">@Nullable</span>
<span class="w"> </span><span class="n">CredentialsProvider</span><span class="w"> </span><span class="nf">getCredentialsProvider</span><span class="p">()</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">credentialsProvider</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * Get the {@link SSLIOSessionStrategy} that will be added to the HTTP client.</span>
<span class="cm"> *</span>
<span class="cm"> * @return Never {@code null}.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="n">SSLIOSessionStrategy</span><span class="w"> </span><span class="nf">getSSLStrategy</span><span class="p">()</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">sslStrategy</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * Sets the {@linkplain HttpAsyncClientBuilder#setDefaultCredentialsProvider(CredentialsProvider) credential provider},</span>
<span class="cm"> *</span>
<span class="cm"> * @param httpClientBuilder The client to configure.</span>
<span class="cm"> * @return Always {@code httpClientBuilder}.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="nd">@Override</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="n">HttpAsyncClientBuilder</span><span class="w"> </span><span class="nf">customizeHttpClient</span><span class="p">(</span><span class="kd">final</span><span class="w"> </span><span class="n">HttpAsyncClientBuilder</span><span class="w"> </span><span class="n">httpClientBuilder</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="c1">// enable SSL / TLS</span>
<span class="w"> </span><span class="n">httpClientBuilder</span><span class="p">.</span><span class="na">setSSLStrategy</span><span class="p">(</span><span class="n">sslStrategy</span><span class="p">);</span>
<span class="w"> </span><span class="c1">// enable user authentication</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">credentialsProvider</span><span class="w"> </span><span class="o">!=</span><span class="w"> </span><span class="kc">null</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">httpClientBuilder</span><span class="p">.</span><span class="na">setDefaultCredentialsProvider</span><span class="p">(</span><span class="n">credentialsProvider</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">httpClientBuilder</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kd">class</span> <span class="nc">NullHostNameVerifier</span><span class="w"> </span><span class="kd">implements</span><span class="w"> </span><span class="n">HostnameVerifier</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="nd">@Override</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kt">boolean</span><span class="w"> </span><span class="nf">verify</span><span class="p">(</span><span class="n">String</span><span class="w"> </span><span class="n">arg0</span><span class="p">,</span><span class="w"> </span><span class="n">SSLSession</span><span class="w"> </span><span class="n">arg1</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="kc">true</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm">* The following is an example of the main function. Call the create function to create a high-level client, call the getLowLevelClient() function to obtain a low-level client, and check whether the test index exists.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">main</span><span class="p">(</span><span class="n">String</span><span class="o">[]</span><span class="w"> </span><span class="n">args</span><span class="p">)</span><span class="w"> </span><span class="kd">throws</span><span class="w"> </span><span class="n">IOException</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">RestHighLevelClient</span><span class="w"> </span><span class="n">client</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">create</span><span class="p">(</span><span class="n">Arrays</span><span class="p">.</span><span class="na">asList</span><span class="p">(</span><span class="s">&quot;xxx.xxx.xxx.xxx&quot;</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;xxx.xxx.xxx.xxx&quot;</span><span class="p">),</span><span class="w"> </span><span class="mi">9200</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;http&quot;</span><span class="p">,</span><span class="w"> </span><span class="mi">1000</span><span class="p">,</span><span class="w"> </span><span class="mi">1000</span><span class="p">,</span><span class="w"> </span><span class="mi">1000</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;username&quot;</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;password&quot;</span><span class="p">);</span>
<span class="w"> </span><span class="n">RestClient</span><span class="w"> </span><span class="n">lowLevelClient</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">client</span><span class="p">.</span><span class="na">getLowLevelClient</span><span class="p">();</span>
<span class="w"> </span><span class="n">Request</span><span class="w"> </span><span class="n">request</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">Request</span><span class="p">(</span><span class="s">&quot;HEAD&quot;</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;test&quot;</span><span class="p">);</span>
<span class="w"> </span><span class="n">Response</span><span class="w"> </span><span class="n">response</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">lowLevelClient</span><span class="p">.</span><span class="na">performRequest</span><span class="p">(</span><span class="n">request</span><span class="p">);</span>
<span class="w"> </span><span class="n">System</span><span class="p">.</span><span class="na">out</span><span class="p">.</span><span class="na">println</span><span class="p">(</span><span class="n">response</span><span class="p">.</span><span class="na">getStatusLine</span><span class="p">().</span><span class="na">getStatusCode</span><span class="p">());</span>
<span class="w"> </span><span class="n">lowLevelClient</span><span class="p">.</span><span class="na">close</span><span class="p">();</span>
<span class="w"> </span><span class="p">}</span>
<span class="p">}</span>
</pre></div></td></tr></table></div>
</div>
</li></ul>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_table139354125176" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Variables</caption><thead align="left"><tr id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_row15833437142513"><th align="left" class="cellrowborder" valign="top" width="50%" id="mcps1.3.7.3.2.3.1.1"><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p198331837112510">Parameter</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="50%" id="mcps1.3.7.3.2.3.1.2"><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p1783383762518">Description</p>
</th>
</tr>
</thead>
<tbody><tr id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_row383320375257"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.7.3.2.3.1.1 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p15833153752514">host</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.7.3.2.3.1.2 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p18833143722511">IP address for accessing the Elasticsearch cluster. If there are multiple IP addresses, separate them with commas (,).</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_row128330374257"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.7.3.2.3.1.1 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p783393711258">port</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.7.3.2.3.1.2 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p683383742515">Access port of the Elasticsearch cluster. The default value is <strong id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_b6744175817191">9200</strong>.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_row168338373258"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.7.3.2.3.1.1 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p20833103732519">protocol</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.7.3.2.3.1.2 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p3833173717256">Connection protocol, which can be <span class="parmvalue" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_parmvalue1396718581463"><b>http</b></span> or <span class="parmvalue" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_parmvalue20530414473"><b>https</b></span>.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_row1783383719259"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.7.3.2.3.1.1 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p1883393722511">connectTimeout</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.7.3.2.3.1.2 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p58331737132519">Socket connection timeout (in ms).</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_row383303742519"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.7.3.2.3.1.1 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p1983373711259">connectionRequestTimeout</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.7.3.2.3.1.2 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p1283415379254">Socket connection request timeout (in ms).</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_row14834037102517"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.7.3.2.3.1.1 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p138341371258">socketTimeout</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.7.3.2.3.1.2 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p4834153732515">Socket request timeout (in ms).</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_row148340375259"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.7.3.2.3.1.1 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p1834153762511">username</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.7.3.2.3.1.2 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p1183412376255">Username for accessing the cluster.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_row208346377257"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.7.3.2.3.1.1 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p12834183715254">password</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.7.3.2.3.1.2 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p1083473782518">Password of the user.</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="section" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_section1684712173252"><a name="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_section1684712173252"></a><a name="en-us_topic_0000001934179694_section1684712173252"></a><h4 class="sectiontitle">Connecting to a Security-Mode Cluster Through Low Level REST Client (With a Security Certificate)</h4><div class="caution" id="EN-US_TOPIC_0000001972416125__note181584211213"><span class="cautiontitle"><img src="public_sys-resources/caution_3.0-en-us.png"> </span><div class="cautionbody"><p id="EN-US_TOPIC_0000001972416125__p157684045312">For how to obtain and upload a security certificate, see <a href="#EN-US_TOPIC_0000001972416125__section16306122401412">Obtaining and Uploading a Security Certificate</a>.</p>
</div></div>
<ul id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_ul428204002615"><li id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_li728154012611"><strong id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_b03977591863">Method 1: Directly create a Low Level REST Client.</strong><div class="codecoloring" codetype="Java" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_screen528134082614"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal"> 1</span>
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<span class="normal">153</span></pre></div></td><td class="code"><div><pre><span></span><span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.HttpHost</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.auth.AuthScope</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.auth.UsernamePasswordCredentials</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.client.CredentialsProvider</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.conn.ssl.NoopHostnameVerifier</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.impl.client.BasicCredentialsProvider</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.impl.nio.client.HttpAsyncClientBuilder</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.nio.conn.ssl.SSLIOSessionStrategy</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.logging.log4j.LogManager</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.logging.log4j.Logger</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.Request</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.Response</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.RestClient</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.RestClientBuilder</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.common.Nullable</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.io.File</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.io.FileInputStream</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.io.IOException</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.io.InputStream</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.security.KeyStore</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.security.SecureRandom</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.security.cert.CertificateException</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.security.cert.X509Certificate</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.util.Arrays</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.util.List</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.util.Objects</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">javax.net.ssl.SSLContext</span><span class="p">;</span><span class="kn">import</span><span class="w"> </span><span class="nn">javax.net.ssl.TrustManager</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">javax.net.ssl.TrustManagerFactory</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">javax.net.ssl.X509TrustManager</span><span class="p">;</span>
<span class="kd">public</span><span class="w"> </span><span class="kd">class</span> <span class="nc">Main13</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="kd">private</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">Logger</span><span class="w"> </span><span class="n">logger</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">LogManager</span><span class="p">.</span><span class="na">getLogger</span><span class="p">(</span><span class="n">Main</span><span class="p">.</span><span class="na">class</span><span class="p">);</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * Create a class for the client. Define the create function.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="n">RestClient</span><span class="w"> </span><span class="nf">create</span><span class="p">(</span><span class="n">List</span><span class="o">&lt;</span><span class="n">String</span><span class="o">&gt;</span><span class="w"> </span><span class="n">host</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">port</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">protocol</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">connectTimeout</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">connectionRequestTimeout</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">socketTimeout</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">username</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">password</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">certFilePath</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">certPassword</span><span class="p">)</span><span class="w"> </span><span class="kd">throws</span><span class="w"> </span><span class="n">IOException</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">CredentialsProvider</span><span class="w"> </span><span class="n">credentialsProvider</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">BasicCredentialsProvider</span><span class="p">();</span>
<span class="w"> </span><span class="n">credentialsProvider</span><span class="p">.</span><span class="na">setCredentials</span><span class="p">(</span><span class="n">AuthScope</span><span class="p">.</span><span class="na">ANY</span><span class="p">,</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">UsernamePasswordCredentials</span><span class="p">(</span><span class="n">username</span><span class="p">,</span><span class="w"> </span><span class="n">password</span><span class="p">));</span>
<span class="w"> </span><span class="n">SSLContext</span><span class="w"> </span><span class="n">sc</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="kc">null</span><span class="p">;</span>
<span class="w"> </span><span class="k">try</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">TrustManager</span><span class="o">[]</span><span class="w"> </span><span class="n">tm</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">{</span><span class="k">new</span><span class="w"> </span><span class="n">MyX509TrustManager</span><span class="p">(</span><span class="n">certFilePath</span><span class="p">,</span><span class="w"> </span><span class="n">certPassword</span><span class="p">)};</span>
<span class="w"> </span><span class="n">sc</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">SSLContext</span><span class="p">.</span><span class="na">getInstance</span><span class="p">(</span><span class="s">&quot;SSL&quot;</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;SunJSSE&quot;</span><span class="p">);</span>
<span class="w"> </span><span class="c1">//You can also use SSLContext sslContext = SSLContext.getInstance(&quot;TLSv1.2&quot;);</span>
<span class="w"> </span><span class="n">sc</span><span class="p">.</span><span class="na">init</span><span class="p">(</span><span class="kc">null</span><span class="p">,</span><span class="w"> </span><span class="n">tm</span><span class="p">,</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">SecureRandom</span><span class="p">());</span>
<span class="w"> </span><span class="p">}</span><span class="w"> </span><span class="k">catch</span><span class="w"> </span><span class="p">(</span><span class="n">Exception</span><span class="w"> </span><span class="n">e</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">e</span><span class="p">.</span><span class="na">printStackTrace</span><span class="p">();</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="n">SSLIOSessionStrategy</span><span class="w"> </span><span class="n">sessionStrategy</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">SSLIOSessionStrategy</span><span class="p">(</span><span class="n">sc</span><span class="p">,</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">NoopHostnameVerifier</span><span class="p">());</span>
<span class="w"> </span><span class="n">SecuredHttpClientConfigCallback</span><span class="w"> </span><span class="n">httpClientConfigCallback</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">SecuredHttpClientConfigCallback</span><span class="p">(</span><span class="n">sessionStrategy</span><span class="p">,</span>
<span class="w"> </span><span class="n">credentialsProvider</span><span class="p">);</span>
<span class="w"> </span><span class="n">RestClientBuilder</span><span class="w"> </span><span class="n">builder</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">RestClient</span><span class="p">.</span><span class="na">builder</span><span class="p">(</span><span class="n">constructHttpHosts</span><span class="p">(</span><span class="n">host</span><span class="p">,</span><span class="w"> </span><span class="n">port</span><span class="p">,</span><span class="w"> </span><span class="n">protocol</span><span class="p">))</span>
<span class="w"> </span><span class="p">.</span><span class="na">setRequestConfigCallback</span><span class="p">(</span><span class="n">requestConfig</span><span class="w"> </span><span class="o">-&gt;</span><span class="w"> </span><span class="n">requestConfig</span><span class="p">.</span><span class="na">setConnectTimeout</span><span class="p">(</span><span class="n">connectTimeout</span><span class="p">)</span>
<span class="w"> </span><span class="p">.</span><span class="na">setConnectionRequestTimeout</span><span class="p">(</span><span class="n">connectionRequestTimeout</span><span class="p">)</span>
<span class="w"> </span><span class="p">.</span><span class="na">setSocketTimeout</span><span class="p">(</span><span class="n">socketTimeout</span><span class="p">))</span>
<span class="w"> </span><span class="p">.</span><span class="na">setHttpClientConfigCallback</span><span class="p">(</span><span class="n">httpClientConfigCallback</span><span class="p">);</span>
<span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">RestClient</span><span class="w"> </span><span class="n">client</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">builder</span><span class="p">.</span><span class="na">build</span><span class="p">();</span>
<span class="w"> </span><span class="n">logger</span><span class="p">.</span><span class="na">info</span><span class="p">(</span><span class="s">&quot;es rest client build success {} &quot;</span><span class="p">,</span><span class="w"> </span><span class="n">client</span><span class="p">);</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">client</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * Use the constructHttpHosts function to convert the node IP address list of the host cluster.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="n">HttpHost</span><span class="o">[]</span><span class="w"> </span><span class="nf">constructHttpHosts</span><span class="p">(</span><span class="n">List</span><span class="o">&lt;</span><span class="n">String</span><span class="o">&gt;</span><span class="w"> </span><span class="n">host</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">port</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">protocol</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">host</span><span class="p">.</span><span class="na">stream</span><span class="p">().</span><span class="na">map</span><span class="p">(</span><span class="n">p</span><span class="w"> </span><span class="o">-&gt;</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">HttpHost</span><span class="p">(</span><span class="n">p</span><span class="p">,</span><span class="w"> </span><span class="n">port</span><span class="p">,</span><span class="w"> </span><span class="n">protocol</span><span class="p">)).</span><span class="na">toArray</span><span class="p">(</span><span class="n">HttpHost</span><span class="o">[]</span><span class="p">::</span><span class="k">new</span><span class="p">);}</span>
<span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kd">class</span> <span class="nc">SecuredHttpClientConfigCallback</span><span class="w"> </span><span class="kd">implements</span><span class="w"> </span><span class="n">RestClientBuilder</span><span class="p">.</span><span class="na">HttpClientConfigCallback</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="nd">@Nullable</span>
<span class="w"> </span><span class="kd">private</span><span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">CredentialsProvider</span><span class="w"> </span><span class="n">credentialsProvider</span><span class="p">;</span>
<span class="w"> </span><span class="kd">private</span><span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">SSLIOSessionStrategy</span><span class="w"> </span><span class="n">sslStrategy</span><span class="p">;</span>
<span class="w"> </span><span class="n">SecuredHttpClientConfigCallback</span><span class="p">(</span><span class="kd">final</span><span class="w"> </span><span class="n">SSLIOSessionStrategy</span><span class="w"> </span><span class="n">sslStrategy</span><span class="p">,</span>
<span class="w"> </span><span class="nd">@Nullable</span><span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">CredentialsProvider</span><span class="w"> </span><span class="n">credentialsProvider</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">this</span><span class="p">.</span><span class="na">sslStrategy</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">Objects</span><span class="p">.</span><span class="na">requireNonNull</span><span class="p">(</span><span class="n">sslStrategy</span><span class="p">);</span>
<span class="w"> </span><span class="k">this</span><span class="p">.</span><span class="na">credentialsProvider</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">credentialsProvider</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="nd">@Nullable</span>
<span class="w"> </span><span class="n">CredentialsProvider</span><span class="w"> </span><span class="nf">getCredentialsProvider</span><span class="p">()</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">credentialsProvider</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="n">SSLIOSessionStrategy</span><span class="w"> </span><span class="nf">getSSLStrategy</span><span class="p">()</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">sslStrategy</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="nd">@Override</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="n">HttpAsyncClientBuilder</span><span class="w"> </span><span class="nf">customizeHttpClient</span><span class="p">(</span><span class="kd">final</span><span class="w"> </span><span class="n">HttpAsyncClientBuilder</span><span class="w"> </span><span class="n">httpClientBuilder</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">httpClientBuilder</span><span class="p">.</span><span class="na">setSSLStrategy</span><span class="p">(</span><span class="n">sslStrategy</span><span class="p">);</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">credentialsProvider</span><span class="w"> </span><span class="o">!=</span><span class="w"> </span><span class="kc">null</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">httpClientBuilder</span><span class="p">.</span><span class="na">setDefaultCredentialsProvider</span><span class="p">(</span><span class="n">credentialsProvider</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">httpClientBuilder</span><span class="p">;</span>
<span class="w"> </span><span class="p">}}</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kd">class</span> <span class="nc">MyX509TrustManager</span><span class="w"> </span><span class="kd">implements</span><span class="w"> </span><span class="n">X509TrustManager</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">X509TrustManager</span><span class="w"> </span><span class="n">sunJSSEX509TrustManager</span><span class="p">;</span>
<span class="w"> </span><span class="n">MyX509TrustManager</span><span class="p">(</span><span class="n">String</span><span class="w"> </span><span class="n">certFilePath</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">certPassword</span><span class="p">)</span><span class="w"> </span><span class="kd">throws</span><span class="w"> </span><span class="n">Exception</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">File</span><span class="w"> </span><span class="n">file</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">File</span><span class="p">(</span><span class="n">certFilePath</span><span class="p">);</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="o">!</span><span class="n">file</span><span class="p">.</span><span class="na">isFile</span><span class="p">())</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">throw</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">Exception</span><span class="p">(</span><span class="s">&quot;Wrong Certification Path&quot;</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="n">System</span><span class="p">.</span><span class="na">out</span><span class="p">.</span><span class="na">println</span><span class="p">(</span><span class="s">&quot;Loading KeyStore &quot;</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">file</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="s">&quot;...&quot;</span><span class="p">);</span>
<span class="w"> </span><span class="n">InputStream</span><span class="w"> </span><span class="n">in</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">FileInputStream</span><span class="p">(</span><span class="n">file</span><span class="p">);</span>
<span class="w"> </span><span class="n">KeyStore</span><span class="w"> </span><span class="n">ks</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">KeyStore</span><span class="p">.</span><span class="na">getInstance</span><span class="p">(</span><span class="s">&quot;JKS&quot;</span><span class="p">);</span>
<span class="w"> </span><span class="n">ks</span><span class="p">.</span><span class="na">load</span><span class="p">(</span><span class="n">in</span><span class="p">,</span><span class="w"> </span><span class="n">certPassword</span><span class="p">.</span><span class="na">toCharArray</span><span class="p">());</span>
<span class="w"> </span><span class="n">TrustManagerFactory</span><span class="w"> </span><span class="n">tmf</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">TrustManagerFactory</span><span class="p">.</span><span class="na">getInstance</span><span class="p">(</span><span class="s">&quot;SunX509&quot;</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;SunJSSE&quot;</span><span class="p">);</span>
<span class="w"> </span><span class="n">tmf</span><span class="p">.</span><span class="na">init</span><span class="p">(</span><span class="n">ks</span><span class="p">);</span>
<span class="w"> </span><span class="n">TrustManager</span><span class="o">[]</span><span class="w"> </span><span class="n">tms</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">tmf</span><span class="p">.</span><span class="na">getTrustManagers</span><span class="p">();</span>
<span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="p">(</span><span class="n">TrustManager</span><span class="w"> </span><span class="n">tm</span><span class="w"> </span><span class="p">:</span><span class="w"> </span><span class="n">tms</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">tm</span><span class="w"> </span><span class="k">instanceof</span><span class="w"> </span><span class="n">X509TrustManager</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">sunJSSEX509TrustManager</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="n">X509TrustManager</span><span class="p">)</span><span class="w"> </span><span class="n">tm</span><span class="p">;</span>
<span class="w"> </span><span class="k">return</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="k">throw</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">Exception</span><span class="p">(</span><span class="s">&quot;Couldn't initialize&quot;</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="nd">@Override</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">checkClientTrusted</span><span class="p">(</span><span class="n">X509Certificate</span><span class="o">[]</span><span class="w"> </span><span class="n">chain</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">authType</span><span class="p">)</span><span class="w"> </span><span class="kd">throws</span><span class="w"> </span><span class="n">CertificateException</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="nd">@Override</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">checkServerTrusted</span><span class="p">(</span><span class="n">X509Certificate</span><span class="o">[]</span><span class="w"> </span><span class="n">chain</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">authType</span><span class="p">)</span><span class="w"> </span><span class="kd">throws</span><span class="w"> </span><span class="n">CertificateException</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="nd">@Override</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="n">X509Certificate</span><span class="o">[]</span><span class="w"> </span><span class="nf">getAcceptedIssuers</span><span class="p">()</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">X509Certificate</span><span class="o">[</span><span class="mi">0</span><span class="o">]</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * The following is an example of the main function. Call the create function to create a Low Level REST Client and check whether the test index exists.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">main</span><span class="p">(</span><span class="n">String</span><span class="o">[]</span><span class="w"> </span><span class="n">args</span><span class="p">)</span><span class="w"> </span><span class="kd">throws</span><span class="w"> </span><span class="n">IOException</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">RestClient</span><span class="w"> </span><span class="n">lowLevelClient</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">create</span><span class="p">(</span><span class="n">Arrays</span><span class="p">.</span><span class="na">asList</span><span class="p">(</span><span class="s">&quot;xxx.xxx.xxx.xxx&quot;</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;xxx.xxx.xxx.xxx&quot;</span><span class="p">),</span><span class="w"> </span><span class="mi">9200</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;https&quot;</span><span class="p">,</span><span class="w"> </span><span class="mi">1000</span><span class="p">,</span><span class="w"> </span><span class="mi">1000</span><span class="p">,</span><span class="w"> </span><span class="mi">1000</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;username&quot;</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;password&quot;</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;certFilePath&quot;</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;certPassword&quot;</span><span class="p">);</span>
<span class="w"> </span><span class="n">Request</span><span class="w"> </span><span class="n">request</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">Request</span><span class="p">(</span><span class="s">&quot;HEAD&quot;</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;test&quot;</span><span class="p">);</span>
<span class="w"> </span><span class="n">Response</span><span class="w"> </span><span class="n">response</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">lowLevelClient</span><span class="p">.</span><span class="na">performRequest</span><span class="p">(</span><span class="n">request</span><span class="p">);</span>
<span class="w"> </span><span class="n">System</span><span class="p">.</span><span class="na">out</span><span class="p">.</span><span class="na">println</span><span class="p">(</span><span class="n">response</span><span class="p">.</span><span class="na">getStatusLine</span><span class="p">().</span><span class="na">getStatusCode</span><span class="p">());</span>
<span class="w"> </span><span class="n">lowLevelClient</span><span class="p">.</span><span class="na">close</span><span class="p">();</span>
<span class="w"> </span><span class="p">}</span>
<span class="p">}</span>
</pre></div></td></tr></table></div>
</div>
</li><li id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_li152819405269"><strong id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_b1269181610712">Method 2: Create a high-level client and then call getLowLevelClient() to obtain a low-level client.</strong><div class="codecoloring" codetype="Java" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_screen92844042615"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal"> 1</span>
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<span class="normal">162</span></pre></div></td><td class="code"><div><pre><span></span><span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.HttpHost</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.auth.AuthScope</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.auth.UsernamePasswordCredentials</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.client.CredentialsProvider</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.conn.ssl.NoopHostnameVerifier</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.impl.client.BasicCredentialsProvider</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.impl.nio.client.HttpAsyncClientBuilder</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.http.nio.conn.ssl.SSLIOSessionStrategy</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.logging.log4j.LogManager</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.apache.logging.log4j.Logger</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.action.admin.cluster.health.ClusterHealthRequest</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.action.admin.cluster.health.ClusterHealthResponse</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.Request</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.RequestOptions</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.Response</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.RestClient</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.RestClientBuilder</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.client.RestHighLevelClient</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">org.elasticsearch.common.Nullable</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.io.File</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.io.FileInputStream</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.io.IOException</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.io.InputStream</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.security.KeyStore</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.security.SecureRandom</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.security.cert.CertificateException</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.security.cert.X509Certificate</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.util.Arrays</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.util.List</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">java.util.Objects</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">javax.net.ssl.SSLContext</span><span class="p">;</span><span class="kn">import</span><span class="w"> </span><span class="nn">javax.net.ssl.TrustManager</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">javax.net.ssl.TrustManagerFactory</span><span class="p">;</span>
<span class="kn">import</span><span class="w"> </span><span class="nn">javax.net.ssl.X509TrustManager</span><span class="p">;</span>
<span class="kd">public</span><span class="w"> </span><span class="kd">class</span> <span class="nc">Main</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="kd">private</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">Logger</span><span class="w"> </span><span class="n">logger</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">LogManager</span><span class="p">.</span><span class="na">getLogger</span><span class="p">(</span><span class="n">Main</span><span class="p">.</span><span class="na">class</span><span class="p">);</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * Create a class for the client. Define the create function.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="n">RestHighLevelClient</span><span class="w"> </span><span class="nf">create</span><span class="p">(</span><span class="n">List</span><span class="o">&lt;</span><span class="n">String</span><span class="o">&gt;</span><span class="w"> </span><span class="n">host</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">port</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">protocol</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">connectTimeout</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">connectionRequestTimeout</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">socketTimeout</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">username</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">password</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">certFilePath</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">certPassword</span><span class="p">)</span><span class="w"> </span><span class="kd">throws</span><span class="w"> </span><span class="n">IOException</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">CredentialsProvider</span><span class="w"> </span><span class="n">credentialsProvider</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">BasicCredentialsProvider</span><span class="p">();</span>
<span class="w"> </span><span class="n">credentialsProvider</span><span class="p">.</span><span class="na">setCredentials</span><span class="p">(</span><span class="n">AuthScope</span><span class="p">.</span><span class="na">ANY</span><span class="p">,</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">UsernamePasswordCredentials</span><span class="p">(</span><span class="n">username</span><span class="p">,</span><span class="w"> </span><span class="n">password</span><span class="p">));</span>
<span class="w"> </span><span class="n">SSLContext</span><span class="w"> </span><span class="n">sc</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="kc">null</span><span class="p">;</span>
<span class="w"> </span><span class="k">try</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">TrustManager</span><span class="o">[]</span><span class="w"> </span><span class="n">tm</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">{</span><span class="k">new</span><span class="w"> </span><span class="n">MyX509TrustManager</span><span class="p">(</span><span class="n">certFilePath</span><span class="p">,</span><span class="w"> </span><span class="n">certPassword</span><span class="p">)};</span>
<span class="w"> </span><span class="n">sc</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">SSLContext</span><span class="p">.</span><span class="na">getInstance</span><span class="p">(</span><span class="s">&quot;SSL&quot;</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;SunJSSE&quot;</span><span class="p">);</span>
<span class="w"> </span><span class="c1">//You can also use SSLContext sslContext = SSLContext.getInstance(&quot;TLSv1.2&quot;);</span>
<span class="w"> </span><span class="n">sc</span><span class="p">.</span><span class="na">init</span><span class="p">(</span><span class="kc">null</span><span class="p">,</span><span class="w"> </span><span class="n">tm</span><span class="p">,</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">SecureRandom</span><span class="p">());</span>
<span class="w"> </span><span class="p">}</span><span class="w"> </span><span class="k">catch</span><span class="w"> </span><span class="p">(</span><span class="n">Exception</span><span class="w"> </span><span class="n">e</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">e</span><span class="p">.</span><span class="na">printStackTrace</span><span class="p">();</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="n">SSLIOSessionStrategy</span><span class="w"> </span><span class="n">sessionStrategy</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">SSLIOSessionStrategy</span><span class="p">(</span><span class="n">sc</span><span class="p">,</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">NoopHostnameVerifier</span><span class="p">());</span>
<span class="w"> </span><span class="n">SecuredHttpClientConfigCallback</span><span class="w"> </span><span class="n">httpClientConfigCallback</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">SecuredHttpClientConfigCallback</span><span class="p">(</span><span class="n">sessionStrategy</span><span class="p">,</span>
<span class="w"> </span><span class="n">credentialsProvider</span><span class="p">);</span>
<span class="w"> </span><span class="n">RestClientBuilder</span><span class="w"> </span><span class="n">builder</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">RestClient</span><span class="p">.</span><span class="na">builder</span><span class="p">(</span><span class="n">constructHttpHosts</span><span class="p">(</span><span class="n">host</span><span class="p">,</span><span class="w"> </span><span class="n">port</span><span class="p">,</span><span class="w"> </span><span class="n">protocol</span><span class="p">))</span>
<span class="w"> </span><span class="p">.</span><span class="na">setRequestConfigCallback</span><span class="p">(</span><span class="n">requestConfig</span><span class="w"> </span><span class="o">-&gt;</span><span class="w"> </span><span class="n">requestConfig</span><span class="p">.</span><span class="na">setConnectTimeout</span><span class="p">(</span><span class="n">connectTimeout</span><span class="p">)</span>
<span class="w"> </span><span class="p">.</span><span class="na">setConnectionRequestTimeout</span><span class="p">(</span><span class="n">connectionRequestTimeout</span><span class="p">)</span>
<span class="w"> </span><span class="p">.</span><span class="na">setSocketTimeout</span><span class="p">(</span><span class="n">socketTimeout</span><span class="p">))</span>
<span class="w"> </span><span class="p">.</span><span class="na">setHttpClientConfigCallback</span><span class="p">(</span><span class="n">httpClientConfigCallback</span><span class="p">);</span>
<span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">RestHighLevelClient</span><span class="w"> </span><span class="n">client</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">RestHighLevelClient</span><span class="p">(</span><span class="n">builder</span><span class="p">);</span>
<span class="w"> </span><span class="n">logger</span><span class="p">.</span><span class="na">info</span><span class="p">(</span><span class="s">&quot;es rest client build success {} &quot;</span><span class="p">,</span><span class="w"> </span><span class="n">client</span><span class="p">);</span>
<span class="w"> </span><span class="n">ClusterHealthRequest</span><span class="w"> </span><span class="n">request</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">ClusterHealthRequest</span><span class="p">();</span>
<span class="w"> </span><span class="n">ClusterHealthResponse</span><span class="w"> </span><span class="n">response</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">client</span><span class="p">.</span><span class="na">cluster</span><span class="p">().</span><span class="na">health</span><span class="p">(</span><span class="n">request</span><span class="p">,</span><span class="w"> </span><span class="n">RequestOptions</span><span class="p">.</span><span class="na">DEFAULT</span><span class="p">);</span>
<span class="w"> </span><span class="n">logger</span><span class="p">.</span><span class="na">info</span><span class="p">(</span><span class="s">&quot;es rest client health response {} &quot;</span><span class="p">,</span><span class="w"> </span><span class="n">response</span><span class="p">);</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">client</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm"> * Use the constructHttpHosts function to convert the node IP address list of the host cluster.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="n">HttpHost</span><span class="o">[]</span><span class="w"> </span><span class="nf">constructHttpHosts</span><span class="p">(</span><span class="n">List</span><span class="o">&lt;</span><span class="n">String</span><span class="o">&gt;</span><span class="w"> </span><span class="n">host</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">port</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">protocol</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">host</span><span class="p">.</span><span class="na">stream</span><span class="p">().</span><span class="na">map</span><span class="p">(</span><span class="n">p</span><span class="w"> </span><span class="o">-&gt;</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">HttpHost</span><span class="p">(</span><span class="n">p</span><span class="p">,</span><span class="w"> </span><span class="n">port</span><span class="p">,</span><span class="w"> </span><span class="n">protocol</span><span class="p">)).</span><span class="na">toArray</span><span class="p">(</span><span class="n">HttpHost</span><span class="o">[]</span><span class="p">::</span><span class="k">new</span><span class="p">);}</span>
<span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kd">class</span> <span class="nc">SecuredHttpClientConfigCallback</span><span class="w"> </span><span class="kd">implements</span><span class="w"> </span><span class="n">RestClientBuilder</span><span class="p">.</span><span class="na">HttpClientConfigCallback</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="nd">@Nullable</span>
<span class="w"> </span><span class="kd">private</span><span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">CredentialsProvider</span><span class="w"> </span><span class="n">credentialsProvider</span><span class="p">;</span>
<span class="w"> </span><span class="kd">private</span><span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">SSLIOSessionStrategy</span><span class="w"> </span><span class="n">sslStrategy</span><span class="p">;</span>
<span class="w"> </span><span class="n">SecuredHttpClientConfigCallback</span><span class="p">(</span><span class="kd">final</span><span class="w"> </span><span class="n">SSLIOSessionStrategy</span><span class="w"> </span><span class="n">sslStrategy</span><span class="p">,</span>
<span class="w"> </span><span class="nd">@Nullable</span><span class="w"> </span><span class="kd">final</span><span class="w"> </span><span class="n">CredentialsProvider</span><span class="w"> </span><span class="n">credentialsProvider</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">this</span><span class="p">.</span><span class="na">sslStrategy</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">Objects</span><span class="p">.</span><span class="na">requireNonNull</span><span class="p">(</span><span class="n">sslStrategy</span><span class="p">);</span>
<span class="w"> </span><span class="k">this</span><span class="p">.</span><span class="na">credentialsProvider</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">credentialsProvider</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="nd">@Nullable</span>
<span class="w"> </span><span class="n">CredentialsProvider</span><span class="w"> </span><span class="nf">getCredentialsProvider</span><span class="p">()</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">credentialsProvider</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="n">SSLIOSessionStrategy</span><span class="w"> </span><span class="nf">getSSLStrategy</span><span class="p">()</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">sslStrategy</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="nd">@Override</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="n">HttpAsyncClientBuilder</span><span class="w"> </span><span class="nf">customizeHttpClient</span><span class="p">(</span><span class="kd">final</span><span class="w"> </span><span class="n">HttpAsyncClientBuilder</span><span class="w"> </span><span class="n">httpClientBuilder</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">httpClientBuilder</span><span class="p">.</span><span class="na">setSSLStrategy</span><span class="p">(</span><span class="n">sslStrategy</span><span class="p">);</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">credentialsProvider</span><span class="w"> </span><span class="o">!=</span><span class="w"> </span><span class="kc">null</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">httpClientBuilder</span><span class="p">.</span><span class="na">setDefaultCredentialsProvider</span><span class="p">(</span><span class="n">credentialsProvider</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">httpClientBuilder</span><span class="p">;</span>
<span class="w"> </span><span class="p">}}</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kd">class</span> <span class="nc">MyX509TrustManager</span><span class="w"> </span><span class="kd">implements</span><span class="w"> </span><span class="n">X509TrustManager</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">X509TrustManager</span><span class="w"> </span><span class="n">sunJSSEX509TrustManager</span><span class="p">;</span>
<span class="w"> </span><span class="n">MyX509TrustManager</span><span class="p">(</span><span class="n">String</span><span class="w"> </span><span class="n">certFilePath</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">certPassword</span><span class="p">)</span><span class="w"> </span><span class="kd">throws</span><span class="w"> </span><span class="n">Exception</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">File</span><span class="w"> </span><span class="n">file</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">File</span><span class="p">(</span><span class="n">certFilePath</span><span class="p">);</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="o">!</span><span class="n">file</span><span class="p">.</span><span class="na">isFile</span><span class="p">())</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">throw</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">Exception</span><span class="p">(</span><span class="s">&quot;Wrong Certification Path&quot;</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="n">System</span><span class="p">.</span><span class="na">out</span><span class="p">.</span><span class="na">println</span><span class="p">(</span><span class="s">&quot;Loading KeyStore &quot;</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">file</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="s">&quot;...&quot;</span><span class="p">);</span>
<span class="w"> </span><span class="n">InputStream</span><span class="w"> </span><span class="n">in</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">FileInputStream</span><span class="p">(</span><span class="n">file</span><span class="p">);</span>
<span class="w"> </span><span class="n">KeyStore</span><span class="w"> </span><span class="n">ks</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">KeyStore</span><span class="p">.</span><span class="na">getInstance</span><span class="p">(</span><span class="s">&quot;JKS&quot;</span><span class="p">);</span>
<span class="w"> </span><span class="n">ks</span><span class="p">.</span><span class="na">load</span><span class="p">(</span><span class="n">in</span><span class="p">,</span><span class="w"> </span><span class="n">certPassword</span><span class="p">.</span><span class="na">toCharArray</span><span class="p">());</span>
<span class="w"> </span><span class="n">TrustManagerFactory</span><span class="w"> </span><span class="n">tmf</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">TrustManagerFactory</span><span class="p">.</span><span class="na">getInstance</span><span class="p">(</span><span class="s">&quot;SunX509&quot;</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;SunJSSE&quot;</span><span class="p">);</span>
<span class="w"> </span><span class="n">tmf</span><span class="p">.</span><span class="na">init</span><span class="p">(</span><span class="n">ks</span><span class="p">);</span>
<span class="w"> </span><span class="n">TrustManager</span><span class="o">[]</span><span class="w"> </span><span class="n">tms</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">tmf</span><span class="p">.</span><span class="na">getTrustManagers</span><span class="p">();</span>
<span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="p">(</span><span class="n">TrustManager</span><span class="w"> </span><span class="n">tm</span><span class="w"> </span><span class="p">:</span><span class="w"> </span><span class="n">tms</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">tm</span><span class="w"> </span><span class="k">instanceof</span><span class="w"> </span><span class="n">X509TrustManager</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">sunJSSEX509TrustManager</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="n">X509TrustManager</span><span class="p">)</span><span class="w"> </span><span class="n">tm</span><span class="p">;</span>
<span class="w"> </span><span class="k">return</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="k">throw</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">Exception</span><span class="p">(</span><span class="s">&quot;Couldn't initialize&quot;</span><span class="p">);</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="nd">@Override</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">checkClientTrusted</span><span class="p">(</span><span class="n">X509Certificate</span><span class="o">[]</span><span class="w"> </span><span class="n">chain</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">authType</span><span class="p">)</span><span class="w"> </span><span class="kd">throws</span><span class="w"> </span><span class="n">CertificateException</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="nd">@Override</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">checkServerTrusted</span><span class="p">(</span><span class="n">X509Certificate</span><span class="o">[]</span><span class="w"> </span><span class="n">chain</span><span class="p">,</span><span class="w"> </span><span class="n">String</span><span class="w"> </span><span class="n">authType</span><span class="p">)</span><span class="w"> </span><span class="kd">throws</span><span class="w"> </span><span class="n">CertificateException</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="nd">@Override</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="n">X509Certificate</span><span class="o">[]</span><span class="w"> </span><span class="nf">getAcceptedIssuers</span><span class="p">()</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">X509Certificate</span><span class="o">[</span><span class="mi">0</span><span class="o">]</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="cm">/**</span>
<span class="cm">* The following is an example of the main function. Call the create function to create a high-level client, call the getLowLevelClient() function to obtain a low-level client, and check whether the test index exists.</span>
<span class="cm"> */</span>
<span class="w"> </span><span class="kd">public</span><span class="w"> </span><span class="kd">static</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="nf">main</span><span class="p">(</span><span class="n">String</span><span class="o">[]</span><span class="w"> </span><span class="n">args</span><span class="p">)</span><span class="w"> </span><span class="kd">throws</span><span class="w"> </span><span class="n">IOException</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n">RestHighLevelClient</span><span class="w"> </span><span class="n">client</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">create</span><span class="p">(</span><span class="n">Arrays</span><span class="p">.</span><span class="na">asList</span><span class="p">(</span><span class="s">&quot;xxx.xxx.xxx.xxx&quot;</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;xxx.xxx.xxx.xxx&quot;</span><span class="p">),</span><span class="w"> </span><span class="mi">9200</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;https&quot;</span><span class="p">,</span><span class="w"> </span><span class="mi">1000</span><span class="p">,</span><span class="w"> </span><span class="mi">1000</span><span class="p">,</span><span class="w"> </span><span class="mi">1000</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;username&quot;</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;password&quot;</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;certFilePath&quot;</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;certPassword&quot;</span><span class="p">);</span>
<span class="w"> </span><span class="n">RestClient</span><span class="w"> </span><span class="n">lowLevelClient</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">client</span><span class="p">.</span><span class="na">getLowLevelClient</span><span class="p">();</span>
<span class="w"> </span><span class="n">Request</span><span class="w"> </span><span class="n">request</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">Request</span><span class="p">(</span><span class="s">&quot;HEAD&quot;</span><span class="p">,</span><span class="w"> </span><span class="s">&quot;test&quot;</span><span class="p">);</span>
<span class="w"> </span><span class="n">Response</span><span class="w"> </span><span class="n">response</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">lowLevelClient</span><span class="p">.</span><span class="na">performRequest</span><span class="p">(</span><span class="n">request</span><span class="p">);</span>
<span class="w"> </span><span class="n">System</span><span class="p">.</span><span class="na">out</span><span class="p">.</span><span class="na">println</span><span class="p">(</span><span class="n">response</span><span class="p">.</span><span class="na">getStatusLine</span><span class="p">().</span><span class="na">getStatusCode</span><span class="p">());</span>
<span class="w"> </span><span class="n">lowLevelClient</span><span class="p">.</span><span class="na">close</span><span class="p">();</span>
<span class="w"> </span><span class="p">}</span>
<span class="p">}</span>
</pre></div></td></tr></table></div>
</div>
</li></ul>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001934179694_table182813317245" frame="border" border="1" rules="all"><caption><b>Table 2 </b>Function parameters</caption><thead align="left"><tr id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_row206481815102611"><th align="left" class="cellrowborder" valign="top" width="50%" id="mcps1.3.8.4.2.3.1.1"><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p146481315122613">Parameter</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="50%" id="mcps1.3.8.4.2.3.1.2"><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p1664821532616">Description</p>
</th>
</tr>
</thead>
<tbody><tr id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_row164881519264"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.8.4.2.3.1.1 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p1264812159264">host</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.8.4.2.3.1.2 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p126440284363">IP address for accessing the Elasticsearch cluster. If there are multiple IP addresses, separate them with commas (,).</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_row86484154262"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.8.4.2.3.1.1 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p136481815152615">port</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.8.4.2.3.1.2 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p17648131512260">Access port of the Elasticsearch cluster. The default value is <strong id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_b7425131892015">9200</strong>.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_row17648715122619"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.8.4.2.3.1.1 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p18648171510262">protocol</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.8.4.2.3.1.2 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p164819158263">Connection protocol. Set this parameter to <strong id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_b47182013142">https</strong>.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_row13648201582613"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.8.4.2.3.1.1 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p1464818153264">connectTimeout</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.8.4.2.3.1.2 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p10648181514261">Socket connection timeout (in ms).</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_row10648151513262"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.8.4.2.3.1.1 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p1064891532615">connectionRequestTimeout</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.8.4.2.3.1.2 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p3648141592614">Socket connection request timeout (in ms).</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_row9648161522617"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.8.4.2.3.1.1 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p1164941582616">socketTimeout</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.8.4.2.3.1.2 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p1649191532615">Socket request timeout (in ms).</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_row1649141562617"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.8.4.2.3.1.1 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p764915150267">username</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.8.4.2.3.1.2 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p76491915122611">Username for accessing the cluster.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_row664911156262"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.8.4.2.3.1.1 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p464916154264">password</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.8.4.2.3.1.2 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p064951512267">Password of the user.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_row1864910158268"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.8.4.2.3.1.1 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p1964971512262">certFilePath</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.8.4.2.3.1.2 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p7649151514269">Certificate path.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_row264991542617"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.8.4.2.3.1.1 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p964921542615">certPassword</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.8.4.2.3.1.2 "><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_p1649151582619">Certificate password.</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="section" id="EN-US_TOPIC_0000001972416125__section16306122401412"><a name="EN-US_TOPIC_0000001972416125__section16306122401412"></a><a name="section16306122401412"></a><h4 class="sectiontitle">Obtaining and Uploading a Security Certificate</h4><p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_p14303249141014">To access a security-mode Elasticsearch cluster that uses HTTPS, a security certificate must be loaded. Perform the following steps to obtain the security certificate and upload it to the client:</p>
<ol id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_ol882703218108"><li id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_li1182773217101">Obtain the security certificate <strong id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_b53005936784837">CloudSearchService.cer</strong>.<ol type="a" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_ol0827133291012"><li id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000002338102386_en-us_topic_0000001933318570_li1798555810535"><span id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000002338102386_ph523831318386">Log in to the CSS management console.</span></li><li id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000002338102386_li164461631123811">In the navigation pane on the left, choose <span class="uicontrol" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000002338102386_uicontrol86487267685117"><b>Clusters &gt; Elasticsearch</b></span>.</li><li id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000002338102386_li184472316387">In the cluster list, click the name of the target cluster. The cluster information page is displayed.</li><li id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000002338102386_en-us_topic_0000001933318570_li146461036135810">Click the <span class="wintitle" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000002338102386_wintitle326154154412"><b>Overview</b></span> tab. In the <span class="wintitle" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000002338102386_wintitle1076156104413"><b>Configuration</b></span> area, click <strong id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000002338102386_b1317531104720">Download Certificate</strong> next to <span class="uicontrol" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000002338102386_uicontrol263216261449"><b>HTTPS Access</b></span>.<div class="fignone" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000002338102386_en-us_topic_0000001223914344_fig1877019549519"><span class="figcap"><b>Figure 1 </b>Downloading a security certificate</span><br><span><img id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000002338102386_en-us_topic_0000001223914344_image2793173420519" src="images/en-us_image_0000002412557593.png"></span></div>
</li></ol>
</li><li id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_li1182718329108">Convert the security certificate <strong id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_b69670521924">CloudSearchService.cer</strong>. Upload the downloaded security certificate to the client and use keytool to convert the <span class="filepath" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_filepath282793217101"><b>.cer</b></span> certificate into a <span class="filepath" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_filepath1582783210101"><b>.jks</b></span> certificate that can be read by Java.<ul id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_ul2082783281010"><li id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_li9827133218109">In Linux, run the following command to convert the certificate:<pre class="screen" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_screen182712328102">keytool -import -alias <i><span class="varname" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_varname2827153211109">newname</span></i> -keystore ./truststore.jks -file ./CloudSearchService.cer </pre>
</li><li id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_li16827432171014">In Windows, run the following command to convert the certificate:<pre class="screen" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_screen10827232131020">keytool -import -alias <i><span class="varname" id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_varname1282823281016">newname</span></i> -keystore .\truststore.jks -file .\CloudSearchService.cer</pre>
</li></ul>
<p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_p188281132101015">In the preceding command, <em id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_en-us_topic_0000001961178813_i2126133912318">newname</em> indicates the user-defined certificate name.</p>
<p id="EN-US_TOPIC_0000001972416125__en-us_topic_0000001972375889_p0828193281015">After this command is executed, you will be prompted to set the certificate password and confirm the password. Securely store the password. It will be used for accessing the cluster.</p>
</li></ol>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="css_01_0064.html">Accessing an Elasticsearch Cluster Using Java</a></div>
</div>
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