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6.12 动态代理扩展
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6.14 消息派发扩展
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6.15 线程池扩展
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6.16 序列化扩展
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6.17 网络传输扩展
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6.18 信息交换扩展
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6.19 组网扩展
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6.20 Telnet命令扩展
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6.21 状态检查扩展
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6.22 容器扩展
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6.23 页面扩展
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<h5 id="1-&#x6269;&#x5C55;&#x8BF4;&#x660E;&#xFF1A;">1. &#x6269;&#x5C55;&#x8BF4;&#x660E;&#xFF1A;</h5>
<p>RPC&#x534F;&#x8BAE;&#x6269;&#x5C55;&#xFF0C;&#x5C01;&#x88C5;&#x8FDC;&#x7A0B;&#x8C03;&#x7528;&#x7EC6;&#x8282;&#x3002;</p>
<p>&#x5951;&#x7EA6;&#xFF1A;</p>
<ul>
<li>&#x5F53;&#x7528;&#x6237;&#x8C03;&#x7528; <code>refer()</code> &#x6240;&#x8FD4;&#x56DE;&#x7684; <code>Invoker</code> &#x5BF9;&#x8C61;&#x7684; <code>invoke()</code> &#x65B9;&#x6CD5;&#x65F6;&#xFF0C;&#x534F;&#x8BAE;&#x9700;&#x76F8;&#x5E94;&#x6267;&#x884C;&#x540C; URL &#x8FDC;&#x7AEF; <code>export()</code> &#x4F20;&#x5165;&#x7684; <code>Invoker</code> &#x5BF9;&#x8C61;&#x7684; <code>invoke()</code> &#x65B9;&#x6CD5;&#x3002;</li>
<li>&#x5176;&#x4E2D;&#xFF0C;<code>refer()</code> &#x8FD4;&#x56DE;&#x7684; <code>Invoker</code> &#x7531;&#x534F;&#x8BAE;&#x5B9E;&#x73B0;&#xFF0C;&#x534F;&#x8BAE;&#x901A;&#x5E38;&#x9700;&#x8981;&#x5728;&#x6B64; <code>Invoker</code> &#x4E2D;&#x53D1;&#x9001;&#x8FDC;&#x7A0B;&#x8BF7;&#x6C42;&#xFF0C;<code>export()</code> &#x4F20;&#x5165;&#x7684; <code>Invoker</code> &#x7531;&#x6846;&#x67B6;&#x5B9E;&#x73B0;&#x5E76;&#x4F20;&#x5165;&#xFF0C;&#x534F;&#x8BAE;&#x4E0D;&#x9700;&#x8981;&#x5173;&#x5FC3;&#x3002;</li>
</ul>
<p>&#x6CE8;&#x610F;&#xFF1A;</p>
<ul>
<li>&#x534F;&#x8BAE;&#x4E0D;&#x5173;&#x5FC3;&#x4E1A;&#x52A1;&#x63A5;&#x53E3;&#x7684;&#x900F;&#x660E;&#x4EE3;&#x7406;&#xFF0C;&#x4EE5; <code>Invoker</code> &#x4E3A;&#x4E2D;&#x5FC3;&#xFF0C;&#x7531;&#x5916;&#x5C42;&#x5C06; <code>Invoker</code> &#x8F6C;&#x6362;&#x4E3A;&#x4E1A;&#x52A1;&#x63A5;&#x53E3;&#x3002;</li>
<li>&#x534F;&#x8BAE;&#x4E0D;&#x4E00;&#x5B9A;&#x8981;&#x662F; TCP &#x7F51;&#x7EDC;&#x901A;&#x8BAF;&#xFF0C;&#x6BD4;&#x5982;&#x901A;&#x8FC7;&#x5171;&#x4EAB;&#x6587;&#x4EF6;&#xFF0C;IPC &#x8FDB;&#x7A0B;&#x95F4;&#x901A;&#x8BAF;&#x7B49;&#x3002;</li>
</ul>
<h5 id="2-&#x6269;&#x5C55;&#x63A5;&#x53E3;&#xFF1A;">2. &#x6269;&#x5C55;&#x63A5;&#x53E3;&#xFF1A;</h5>
<ul>
<li><code>com.alibaba.dubbo.rpc.Protocol</code></li>
<li><code>com.alibaba.dubbo.rpc.Exporter</code></li>
<li><code>com.alibaba.dubbo.rpc.Invoker</code></li>
</ul>
<pre><code class="lang-java"><span class="hljs-keyword">public</span> <span class="hljs-class"><span class="hljs-keyword">interface</span> <span class="hljs-title">Protocol</span> </span>{
<span class="hljs-comment">/**
* &#x66B4;&#x9732;&#x8FDC;&#x7A0B;&#x670D;&#x52A1;&#xFF1A;&lt;br&gt;
* 1. &#x534F;&#x8BAE;&#x5728;&#x63A5;&#x6536;&#x8BF7;&#x6C42;&#x65F6;&#xFF0C;&#x5E94;&#x8BB0;&#x5F55;&#x8BF7;&#x6C42;&#x6765;&#x6E90;&#x65B9;&#x5730;&#x5740;&#x4FE1;&#x606F;&#xFF1A;RpcContext.getContext().setRemoteAddress();&lt;br&gt;
* 2. export()&#x5FC5;&#x987B;&#x662F;&#x5E42;&#x7B49;&#x7684;&#xFF0C;&#x4E5F;&#x5C31;&#x662F;&#x66B4;&#x9732;&#x540C;&#x4E00;&#x4E2A;URL&#x7684;Invoker&#x4E24;&#x6B21;&#xFF0C;&#x548C;&#x66B4;&#x9732;&#x4E00;&#x6B21;&#x6CA1;&#x6709;&#x533A;&#x522B;&#x3002;&lt;br&gt;
* 3. export()&#x4F20;&#x5165;&#x7684;Invoker&#x7531;&#x6846;&#x67B6;&#x5B9E;&#x73B0;&#x5E76;&#x4F20;&#x5165;&#xFF0C;&#x534F;&#x8BAE;&#x4E0D;&#x9700;&#x8981;&#x5173;&#x5FC3;&#x3002;&lt;br&gt;
*
* <span class="hljs-doctag">@param</span> &lt;T&gt; &#x670D;&#x52A1;&#x7684;&#x7C7B;&#x578B;
* <span class="hljs-doctag">@param</span> invoker &#x670D;&#x52A1;&#x7684;&#x6267;&#x884C;&#x4F53;
* <span class="hljs-doctag">@return</span> exporter &#x66B4;&#x9732;&#x670D;&#x52A1;&#x7684;&#x5F15;&#x7528;&#xFF0C;&#x7528;&#x4E8E;&#x53D6;&#x6D88;&#x66B4;&#x9732;
* <span class="hljs-doctag">@throws</span> RpcException &#x5F53;&#x66B4;&#x9732;&#x670D;&#x52A1;&#x51FA;&#x9519;&#x65F6;&#x629B;&#x51FA;&#xFF0C;&#x6BD4;&#x5982;&#x7AEF;&#x53E3;&#x5DF2;&#x5360;&#x7528;
*/</span>
&lt;T&gt; <span class="hljs-function">Exporter&lt;T&gt; <span class="hljs-title">export</span><span class="hljs-params">(Invoker&lt;T&gt; invoker)</span> <span class="hljs-keyword">throws</span> RpcException</span>;
<span class="hljs-comment">/**
* &#x5F15;&#x7528;&#x8FDC;&#x7A0B;&#x670D;&#x52A1;&#xFF1A;&lt;br&gt;
* 1. &#x5F53;&#x7528;&#x6237;&#x8C03;&#x7528;refer()&#x6240;&#x8FD4;&#x56DE;&#x7684;Invoker&#x5BF9;&#x8C61;&#x7684;invoke()&#x65B9;&#x6CD5;&#x65F6;&#xFF0C;&#x534F;&#x8BAE;&#x9700;&#x76F8;&#x5E94;&#x6267;&#x884C;&#x540C;URL&#x8FDC;&#x7AEF;export()&#x4F20;&#x5165;&#x7684;Invoker&#x5BF9;&#x8C61;&#x7684;invoke()&#x65B9;&#x6CD5;&#x3002;&lt;br&gt;
* 2. refer()&#x8FD4;&#x56DE;&#x7684;Invoker&#x7531;&#x534F;&#x8BAE;&#x5B9E;&#x73B0;&#xFF0C;&#x534F;&#x8BAE;&#x901A;&#x5E38;&#x9700;&#x8981;&#x5728;&#x6B64;Invoker&#x4E2D;&#x53D1;&#x9001;&#x8FDC;&#x7A0B;&#x8BF7;&#x6C42;&#x3002;&lt;br&gt;
* 3. &#x5F53;url&#x4E2D;&#x6709;&#x8BBE;&#x7F6E;check=false&#x65F6;&#xFF0C;&#x8FDE;&#x63A5;&#x5931;&#x8D25;&#x4E0D;&#x80FD;&#x629B;&#x51FA;&#x5F02;&#x5E38;&#xFF0C;&#x9700;&#x5185;&#x90E8;&#x81EA;&#x52A8;&#x6062;&#x590D;&#x3002;&lt;br&gt;
*
* <span class="hljs-doctag">@param</span> &lt;T&gt; &#x670D;&#x52A1;&#x7684;&#x7C7B;&#x578B;
* <span class="hljs-doctag">@param</span> type &#x670D;&#x52A1;&#x7684;&#x7C7B;&#x578B;
* <span class="hljs-doctag">@param</span> url &#x8FDC;&#x7A0B;&#x670D;&#x52A1;&#x7684;URL&#x5730;&#x5740;
* <span class="hljs-doctag">@return</span> invoker &#x670D;&#x52A1;&#x7684;&#x672C;&#x5730;&#x4EE3;&#x7406;
* <span class="hljs-doctag">@throws</span> RpcException &#x5F53;&#x8FDE;&#x63A5;&#x670D;&#x52A1;&#x63D0;&#x4F9B;&#x65B9;&#x5931;&#x8D25;&#x65F6;&#x629B;&#x51FA;
*/</span>
&lt;T&gt; <span class="hljs-function">Invoker&lt;T&gt; <span class="hljs-title">refer</span><span class="hljs-params">(Class&lt;T&gt; type, URL url)</span> <span class="hljs-keyword">throws</span> RpcException</span>;
}
</code></pre>
<h5 id="3-&#x6269;&#x5C55;&#x914D;&#x7F6E;&#xFF1A;">3. &#x6269;&#x5C55;&#x914D;&#x7F6E;&#xFF1A;</h5>
<pre><code class="lang-xml"><span class="hljs-tag">&lt;<span class="hljs-name">dubbo:protocol</span> <span class="hljs-attr">id</span>=<span class="hljs-string">&quot;xxx1&quot;</span> <span class="hljs-attr">name</span>=<span class="hljs-string">&quot;xxx&quot;</span> /&gt;</span> <span class="hljs-comment">&lt;!-- &#x58F0;&#x660E;&#x534F;&#x8BAE;&#xFF0C;&#x5982;&#x679C;&#x6CA1;&#x6709;&#x914D;&#x7F6E;id&#xFF0C;&#x5C06;&#x4EE5;name&#x4E3A;id --&gt;</span>
<span class="hljs-tag">&lt;<span class="hljs-name">dubbo:service</span> <span class="hljs-attr">protocol</span>=<span class="hljs-string">&quot;xxx1&quot;</span> /&gt;</span> <span class="hljs-comment">&lt;!-- &#x5F15;&#x7528;&#x534F;&#x8BAE;&#xFF0C;&#x5982;&#x679C;&#x6CA1;&#x6709;&#x914D;&#x7F6E;protocol&#x5C5E;&#x6027;&#xFF0C;&#x5C06;&#x5728;ApplicationContext&#x4E2D;&#x81EA;&#x52A8;&#x626B;&#x63CF;protocol&#x914D;&#x7F6E; --&gt;</span>
<span class="hljs-tag">&lt;<span class="hljs-name">dubbo:provider</span> <span class="hljs-attr">protocol</span>=<span class="hljs-string">&quot;xxx1&quot;</span> /&gt;</span> <span class="hljs-comment">&lt;!-- &#x5F15;&#x7528;&#x534F;&#x8BAE;&#x7F3A;&#x7701;&#x503C;&#xFF0C;&#x5F53;&lt;dubbo:service&gt;&#x6CA1;&#x6709;&#x914D;&#x7F6E;prototol&#x5C5E;&#x6027;&#x65F6;&#xFF0C;&#x4F7F;&#x7528;&#x6B64;&#x914D;&#x7F6E; --&gt;</span>
</code></pre>
<h5 id="4-&#x5DF2;&#x77E5;&#x6269;&#x5C55;&#xFF1A;">4. &#x5DF2;&#x77E5;&#x6269;&#x5C55;&#xFF1A;</h5>
<ul>
<li><code>com.alibaba.dubbo.rpc.injvm.InjvmProtocol</code></li>
<li><code>com.alibaba.dubbo.rpc.dubbo.DubboProtocol</code></li>
<li><code>com.alibaba.dubbo.rpc.rmi.RmiProtocol</code></li>
<li><code>com.alibaba.dubbo.rpc.http.HttpProtocol</code></li>
<li><code>com.alibaba.dubbo.rpc.http.hessian.HessianProtocol</code></li>
</ul>
<h5 id="5-&#x6269;&#x5C55;&#x793A;&#x4F8B;&#xFF1A;">5. &#x6269;&#x5C55;&#x793A;&#x4F8B;&#xFF1A;</h5>
<p>Maven&#x9879;&#x76EE;&#x7ED3;&#x6784;</p>
<pre><code>
src
|-main
|-java
|-com
|-xxx
|-XxxProtocol.java (&#x5B9E;&#x73B0;Protocol&#x63A5;&#x53E3;)
|-XxxExporter.java (&#x5B9E;&#x73B0;Exporter&#x63A5;&#x53E3;)
|-XxxInvoker.java (&#x5B9E;&#x73B0;Invoker&#x63A5;&#x53E3;)
|-resources
|-META-INF
|-dubbo
|-com.alibaba.dubbo.rpc.Protocol (&#x7EAF;&#x6587;&#x672C;&#x6587;&#x4EF6;&#xFF0C;&#x5185;&#x5BB9;&#x4E3A;&#xFF1A;xxx=com.xxx.XxxProtocol)
</code></pre><p>XxxProtocol.java</p>
<pre><code class="lang-java"><span class="hljs-keyword">package</span> com.xxx;
<span class="hljs-keyword">import</span> com.alibaba.dubbo.rpc.Protocol;
<span class="hljs-keyword">public</span> <span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">XxxProtocol</span> <span class="hljs-keyword">implements</span> <span class="hljs-title">Protocol</span> </span>{
<span class="hljs-keyword">public</span> &lt;T&gt; <span class="hljs-function">Exporter&lt;T&gt; <span class="hljs-title">export</span><span class="hljs-params">(Invoker&lt;T&gt; invoker)</span> <span class="hljs-keyword">throws</span> RpcException </span>{
<span class="hljs-keyword">return</span> <span class="hljs-keyword">new</span> XxxExporter(invoker);
}
<span class="hljs-keyword">public</span> &lt;T&gt; <span class="hljs-function">Invoker&lt;T&gt; <span class="hljs-title">refer</span><span class="hljs-params">(Class&lt;T&gt; type, URL url)</span> <span class="hljs-keyword">throws</span> RpcException </span>{
<span class="hljs-keyword">return</span> <span class="hljs-keyword">new</span> XxxInvoker(type, url);
}
}
</code></pre>
<p>XxxExporter.java</p>
<pre><code class="lang-java"><span class="hljs-keyword">package</span> com.xxx;
<span class="hljs-keyword">import</span> com.alibaba.dubbo.rpc.support.AbstractExporter;
<span class="hljs-keyword">public</span> <span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">XxxExporter</span>&lt;<span class="hljs-title">T</span>&gt; <span class="hljs-keyword">extends</span> <span class="hljs-title">AbstractExporter</span>&lt;<span class="hljs-title">T</span>&gt; </span>{
<span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-title">XxxExporter</span><span class="hljs-params">(Invoker&lt;T&gt; invoker)</span> <span class="hljs-keyword">throws</span> RemotingException</span>{
<span class="hljs-keyword">super</span>(invoker);
<span class="hljs-comment">// ...</span>
}
<span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">unexport</span><span class="hljs-params">()</span> </span>{
<span class="hljs-keyword">super</span>.unexport();
<span class="hljs-comment">// ...</span>
}
}
</code></pre>
<p>XxxInvoker.java</p>
<pre><code class="lang-java"><span class="hljs-keyword">package</span> com.xxx;
<span class="hljs-keyword">import</span> com.alibaba.dubbo.rpc.support.AbstractInvoker;
<span class="hljs-keyword">public</span> <span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">XxxInvoker</span>&lt;<span class="hljs-title">T</span>&gt; <span class="hljs-keyword">extends</span> <span class="hljs-title">AbstractInvoker</span>&lt;<span class="hljs-title">T</span>&gt; </span>{
<span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-title">XxxInvoker</span><span class="hljs-params">(Class&lt;T&gt; type, URL url)</span> <span class="hljs-keyword">throws</span> RemotingException</span>{
<span class="hljs-keyword">super</span>(type, url);
}
<span class="hljs-function"><span class="hljs-keyword">protected</span> <span class="hljs-keyword">abstract</span> Object <span class="hljs-title">doInvoke</span><span class="hljs-params">(Invocation invocation)</span> <span class="hljs-keyword">throws</span> Throwable </span>{
<span class="hljs-comment">// ...</span>
}
}
</code></pre>
<p>META-INF/dubbo/com.alibaba.dubbo.rpc.Protocol</p>
<pre><code>xxx=com.xxx.XxxProtocol
</code></pre>
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