zh-cn/overview/mannual/golang-sdk/tutorial/develop/interflow/index.xml

<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Apache Dubbo – 异构体系互通</title><link>https://dubbo.apache.org/zh-cn/overview/mannual/golang-sdk/tutorial/develop/interflow/</link><description>Recent content in 异构体系互通 on Apache Dubbo</description><generator>Hugo -- gohugo.io</generator><language>zh-cn</language><atom:link href="https://dubbo.apache.org/zh-cn/overview/mannual/golang-sdk/tutorial/develop/interflow/index.xml" rel="self" type="application/rss+xml"/><item><title>Overview: 与 Java 应用跨语言互通</title><link>https://dubbo.apache.org/zh-cn/overview/mannual/golang-sdk/tutorial/develop/interflow/call_java/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/zh-cn/overview/mannual/golang-sdk/tutorial/develop/interflow/call_java/</guid><description>
&lt;h2 id="准备工作">准备工作&lt;/h2>
&lt;h3 id="环境">环境&lt;/h3>
&lt;p>JDK 8，Golang &amp;gt;= 1.15，Dubbo 3.0.2，zookeeper 启动，&lt;/p>
&lt;h3 id="go--java-互通前提">Go- Java 互通前提&lt;/h3>
&lt;ul>
&lt;li>
&lt;p>Go/Java 定义的传输结构一致&lt;/p>
&lt;ul>
&lt;li>PB 序列化&lt;/li>
&lt;/ul>
&lt;p>proto for Go&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-protobuf" data-lang="protobuf">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// The response message containing the greetings
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>&lt;span style="color:#268bd2">message&lt;/span> &lt;span style="color:#268bd2">User&lt;/span> {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#dc322f">string&lt;/span> name &lt;span style="color:#719e07">=&lt;/span> &lt;span style="color:#2aa198">1&lt;/span>;
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#dc322f">string&lt;/span> id &lt;span style="color:#719e07">=&lt;/span> &lt;span style="color:#2aa198">2&lt;/span>;
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#dc322f">int32&lt;/span> age &lt;span style="color:#719e07">=&lt;/span> &lt;span style="color:#2aa198">3&lt;/span>;
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>proto for Java&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-protobuf" data-lang="protobuf">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// The response message containing the greetings
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>&lt;span style="color:#268bd2">message&lt;/span> &lt;span style="color:#268bd2">User&lt;/span> {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#dc322f">string&lt;/span> name &lt;span style="color:#719e07">=&lt;/span> &lt;span style="color:#2aa198">1&lt;/span>;
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#dc322f">string&lt;/span> id &lt;span style="color:#719e07">=&lt;/span> &lt;span style="color:#2aa198">2&lt;/span>;
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#dc322f">int32&lt;/span> age &lt;span style="color:#719e07">=&lt;/span> &lt;span style="color:#2aa198">3&lt;/span>;
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
&lt;li>Hessian 序列化&lt;/li>
&lt;/ul>
&lt;p>POJO for Go，需参考 &lt;a href="https://www.yuque.com/docs/share/c698bd6e-e4d6-47db-bc1c-c757cc9b4f3e?">Dubbogo Hessian 序列化支持文档&lt;/a>&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-go" data-lang="go">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">type&lt;/span> User &lt;span style="color:#268bd2">struct&lt;/span> {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> ID &lt;span style="color:#dc322f">string&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> Name &lt;span style="color:#dc322f">string&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> Age &lt;span style="color:#dc322f">int32&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">func&lt;/span> (u &lt;span style="color:#719e07">*&lt;/span>User) &lt;span style="color:#268bd2">JavaClassName&lt;/span>() &lt;span style="color:#dc322f">string&lt;/span> {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">return&lt;/span> &lt;span style="color:#2aa198">&amp;#34;org.apache.dubbo.User&amp;#34;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">func&lt;/span> &lt;span style="color:#268bd2">init&lt;/span>(){
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> hessian.&lt;span style="color:#268bd2">RegisterPOJO&lt;/span>(&lt;span style="color:#719e07">&amp;amp;&lt;/span>User{})
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>POJO for Java&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-java" data-lang="java">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">package&lt;/span> org.apache.dubbo
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">public&lt;/span> &lt;span style="color:#268bd2">class&lt;/span> &lt;span style="color:#268bd2">User&lt;/span> &lt;span style="color:#719e07">{&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">private&lt;/span> String id&lt;span style="color:#719e07">;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">private&lt;/span> String name&lt;span style="color:#719e07">;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">private&lt;/span> &lt;span style="color:#dc322f">int&lt;/span> age&lt;span style="color:#719e07">;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">}&lt;/span>
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;/li>
&lt;li>
&lt;p>Java 需要互通的方法签名与 Go 一致&lt;/p>
&lt;p>例如：&lt;/p>
&lt;p>Java Interface&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-java" data-lang="java">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">public&lt;/span> &lt;span style="color:#268bd2">interface&lt;/span> &lt;span style="color:#268bd2">IGreeter&lt;/span> &lt;span style="color:#719e07">{&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75">/**
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75"> * &amp;lt;pre&amp;gt;
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75"> * Sends a greeting
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75"> * &amp;lt;/pre&amp;gt;
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75"> */&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> User &lt;span style="color:#268bd2">sayHello&lt;/span>&lt;span style="color:#719e07">(&lt;/span>HelloRequest request&lt;span style="color:#719e07">);&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">}&lt;/span>
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>Go client (由protoc-gen-go-triple 根据 proto 文件自动生成)&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-go" data-lang="go">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">type&lt;/span> GreeterClientImpl &lt;span style="color:#268bd2">struct&lt;/span> {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75">// Sends a greeting
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span> SayHello &lt;span style="color:#268bd2">func&lt;/span>(ctx context.Context, in &lt;span style="color:#719e07">*&lt;/span>HelloRequest) (&lt;span style="color:#719e07">*&lt;/span>User, &lt;span style="color:#dc322f">error&lt;/span>)
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>Go server (由开发者定义)&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-go" data-lang="go">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">type&lt;/span> GreeterProvider &lt;span style="color:#268bd2">struct&lt;/span> {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> api.GreeterProviderBase
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">func&lt;/span> (s &lt;span style="color:#719e07">*&lt;/span>GreeterProvider) &lt;span style="color:#268bd2">SayHello&lt;/span>(ctx context.Context, in &lt;span style="color:#719e07">*&lt;/span>api.HelloRequest) (&lt;span style="color:#719e07">*&lt;/span>api.User, &lt;span style="color:#dc322f">error&lt;/span>) {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> logger.&lt;span style="color:#268bd2">Infof&lt;/span>(&lt;span style="color:#2aa198">&amp;#34;Dubbo3 GreeterProvider get user name = %s\n&amp;#34;&lt;/span>, in.Name)
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">return&lt;/span> &lt;span style="color:#719e07">&amp;amp;&lt;/span>api.User{Name: &lt;span style="color:#2aa198">&amp;#34;Hello &amp;#34;&lt;/span> &lt;span style="color:#719e07">+&lt;/span> in.Name, Id: &lt;span style="color:#2aa198">&amp;#34;12345&amp;#34;&lt;/span>, Age: &lt;span style="color:#2aa198">21&lt;/span>}, &lt;span style="color:#cb4b16">nil&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>Go 方法需要遵守 &lt;a href="https://www.yuque.com/docs/share/eff9c51f-a7f4-47d6-87ff-11a2152bdffe?">Dubbogo 3.0 用户服务接口定义规范&lt;/a>&lt;/p>
&lt;/li>
&lt;li>
&lt;p>Java 的三元组与Go service/reference 配置的 interface 一致&lt;/p>
&lt;p>三元组，即为接口级别配置的：interface, group, version。&lt;strong>其中需要注意，group 和 version 的概念为 dubbo 接口的 group 和vesion，在启动 dubbo-java 服务时配置于 spring cloud 的 properties 文件中，并非pom.xml 中 mvn 依赖的version。&lt;/strong> group 和version 默认为空，在 dubbo-go 框架中，可以在service/reference 的对应位置指定 group 和 version。&lt;/p>
&lt;p>例如：&lt;/p>
&lt;p>Java 的接口全名：com.apache.dubbo.sample.basic.IGreeter，接口 version 为v1.0.1, group 为&lt;/p>
&lt;p>Go-client:&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-yaml" data-lang="yaml">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">references&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">GreeterClientImpl&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">protocol&lt;/span>: tri
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">interface&lt;/span>: com.apache.dubbo.sample.basic.IGreeter &lt;span style="color:#586e75"># must be compatible with grpc or dubbo-java&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">group&lt;/span>: dubbogo &lt;span style="color:#586e75"># 需要与服务端对应 默认为空&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">version&lt;/span>: v1.0.1 &lt;span style="color:#586e75"># 需要与服务端对应 默认为空&lt;/span>
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>Go-server:&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-yaml" data-lang="yaml">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">services&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">GreeterProvider&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">protocol-ids&lt;/span>: tripleProtocol
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">interface&lt;/span>: com.apache.dubbo.sample.basic.IGreeter &lt;span style="color:#586e75"># must be compatible with grpc or dubbo-java&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">group&lt;/span>: dubbogo &lt;span style="color:#586e75"># 需要与服务端对应 默认为空&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">version&lt;/span>: v1.0.1 &lt;span style="color:#586e75"># 需要与服务端对应 默认为空&lt;/span>
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;/li>
&lt;/ul>
&lt;h2 id="1-基于-triple-协议互通-pb序列化">1. 基于 Triple 协议互通 (PB序列化)&lt;/h2>
&lt;p>参考 &lt;a href="https://github.com/apache/dubbo-go-samples/tree/master/helloworld">dubbo-go-samples/helloworld&lt;/a>&lt;/p>
&lt;h3 id="11-go-client---java-server">1.1 Go-Client -&amp;gt; Java-Server&lt;/h3>
&lt;h4 id="java-server-启动">Java-Server 启动&lt;/h4>
&lt;ol>
&lt;li>定义 Java 的 PB 文件，可参考 &lt;a href="https://dubbo.apache.org/zh-cn/docs/quick-start/">Dubbo 快速开始&lt;/a>&lt;/li>
&lt;/ol>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-protobuf" data-lang="protobuf">&lt;span style="display:flex;">&lt;span>syntax &lt;span style="color:#719e07">=&lt;/span> &lt;span style="color:#2aa198">&amp;#34;proto3&amp;#34;&lt;/span>;
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">option&lt;/span> java_package &lt;span style="color:#719e07">=&lt;/span> &lt;span style="color:#2aa198">&amp;#34;org.apache.dubbo.sample.hello&amp;#34;&lt;/span>;
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">package&lt;/span> helloworld;
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// The request message containing the user&amp;#39;s name.
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>&lt;span style="color:#268bd2">message&lt;/span> &lt;span style="color:#268bd2">HelloRequest&lt;/span> {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#dc322f">string&lt;/span> name &lt;span style="color:#719e07">=&lt;/span> &lt;span style="color:#2aa198">1&lt;/span>;
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// The response message containing the greetings
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>&lt;span style="color:#268bd2">message&lt;/span> &lt;span style="color:#268bd2">User&lt;/span> {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#dc322f">string&lt;/span> name &lt;span style="color:#719e07">=&lt;/span> &lt;span style="color:#2aa198">1&lt;/span>;
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#dc322f">string&lt;/span> id &lt;span style="color:#719e07">=&lt;/span> &lt;span style="color:#2aa198">2&lt;/span>;
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#dc322f">int32&lt;/span> age &lt;span style="color:#719e07">=&lt;/span> &lt;span style="color:#2aa198">3&lt;/span>;
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>该接口描述文件定义了将会生成的 Java 类 org.apache.dubbo.sample.hello.Helloworld，以及类中包含的传输结构 HelloRequest 和 User 类。&lt;/p>
&lt;ol start="2">
&lt;li>
&lt;p>定义服务接口:&lt;/p>
&lt;p>com.apache.dubbo.sample.basic.IGreeter&lt;/p>
&lt;/li>
&lt;/ol>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-java" data-lang="java">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">package&lt;/span> com.apache.dubbo.sample.basic&lt;span style="color:#719e07">;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// 引入根据 PB 生成的类
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>&lt;span style="color:#719e07">import&lt;/span> org.apache.dubbo.sample.hello.Helloworld.User&lt;span style="color:#719e07">;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">import&lt;/span> org.apache.dubbo.sample.hello.Helloworld.HelloRequest&lt;span style="color:#719e07">;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">public&lt;/span> &lt;span style="color:#268bd2">interface&lt;/span> &lt;span style="color:#268bd2">IGreeter&lt;/span> &lt;span style="color:#719e07">{&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75">/**
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75"> * &amp;lt;pre&amp;gt;
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75"> * Sends a greeting
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75"> * &amp;lt;/pre&amp;gt;
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75"> */&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75">// 定义接口
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span> User &lt;span style="color:#268bd2">sayHello&lt;/span>&lt;span style="color:#719e07">(&lt;/span>HelloRequest request&lt;span style="color:#719e07">);&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">}&lt;/span>
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ol start="3">
&lt;li>
&lt;p>实现服务接口:&lt;/p>
&lt;p>IGreeter1Impl.java&lt;/p>
&lt;/li>
&lt;/ol>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-java" data-lang="java">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">package&lt;/span> com.apache.dubbo.sample.basic&lt;span style="color:#719e07">;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">import&lt;/span> org.apache.dubbo.sample.hello.Helloworld.User&lt;span style="color:#719e07">;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">import&lt;/span> org.apache.dubbo.sample.hello.Helloworld.HelloRequest&lt;span style="color:#719e07">;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">public&lt;/span> &lt;span style="color:#268bd2">class&lt;/span> &lt;span style="color:#268bd2">IGreeter1Impl&lt;/span> &lt;span style="color:#268bd2">implements&lt;/span> IGreeter &lt;span style="color:#719e07">{&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">@Override&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">public&lt;/span> User &lt;span style="color:#268bd2">sayHello&lt;/span>&lt;span style="color:#719e07">(&lt;/span>HelloRequest request&lt;span style="color:#719e07">)&lt;/span> &lt;span style="color:#719e07">{&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> System&lt;span style="color:#719e07">.&lt;/span>out&lt;span style="color:#719e07">.&lt;/span>println&lt;span style="color:#719e07">(&lt;/span>&lt;span style="color:#2aa198">&amp;#34;receiv: &amp;#34;&lt;/span> &lt;span style="color:#719e07">+&lt;/span> request&lt;span style="color:#719e07">);&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> User usr &lt;span style="color:#719e07">=&lt;/span> User&lt;span style="color:#719e07">.&lt;/span>newBuilder&lt;span style="color:#719e07">()&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">.&lt;/span>setName&lt;span style="color:#719e07">(&lt;/span>&lt;span style="color:#2aa198">&amp;#34;hello &amp;#34;&lt;/span> &lt;span style="color:#719e07">+&lt;/span> request&lt;span style="color:#719e07">.&lt;/span>getName&lt;span style="color:#719e07">())&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">.&lt;/span>setAge&lt;span style="color:#719e07">(&lt;/span>18&lt;span style="color:#719e07">)&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">.&lt;/span>setId&lt;span style="color:#719e07">(&lt;/span>&lt;span style="color:#2aa198">&amp;#34;12345&amp;#34;&lt;/span>&lt;span style="color:#719e07">).&lt;/span>build&lt;span style="color:#719e07">();&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">return&lt;/span> usr&lt;span style="color:#719e07">;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">}&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">}&lt;/span>
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ol start="4">
&lt;li>
&lt;p>使用 Dubbo3 框架启动服务&lt;/p>
&lt;p>ApiProvider.java&lt;/p>
&lt;/li>
&lt;/ol>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-java" data-lang="java">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">package&lt;/span> com.apache.dubbo.sample.basic&lt;span style="color:#719e07">;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">import&lt;/span> org.apache.dubbo.common.constants.CommonConstants&lt;span style="color:#719e07">;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">import&lt;/span> org.apache.dubbo.config.ApplicationConfig&lt;span style="color:#719e07">;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">import&lt;/span> org.apache.dubbo.config.ProtocolConfig&lt;span style="color:#719e07">;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">import&lt;/span> org.apache.dubbo.config.RegistryConfig&lt;span style="color:#719e07">;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">import&lt;/span> org.apache.dubbo.config.ServiceConfig&lt;span style="color:#719e07">;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">import&lt;/span> java.util.concurrent.CountDownLatch&lt;span style="color:#719e07">;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">public&lt;/span> &lt;span style="color:#268bd2">class&lt;/span> &lt;span style="color:#268bd2">ApiProvider&lt;/span> &lt;span style="color:#719e07">{&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">public&lt;/span> &lt;span style="color:#268bd2">static&lt;/span> &lt;span style="color:#dc322f">void&lt;/span> &lt;span style="color:#268bd2">main&lt;/span>&lt;span style="color:#719e07">(&lt;/span>String&lt;span style="color:#719e07">[]&lt;/span> args&lt;span style="color:#719e07">)&lt;/span> &lt;span style="color:#268bd2">throws&lt;/span> InterruptedException &lt;span style="color:#719e07">{&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> ServiceConfig&lt;span style="color:#719e07">&amp;lt;&lt;/span>IGreeter&lt;span style="color:#719e07">&amp;gt;&lt;/span> service &lt;span style="color:#719e07">=&lt;/span> &lt;span style="color:#719e07">new&lt;/span> ServiceConfig&lt;span style="color:#719e07">&amp;lt;&amp;gt;();&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> service&lt;span style="color:#719e07">.&lt;/span>setInterface&lt;span style="color:#719e07">(&lt;/span>IGreeter&lt;span style="color:#719e07">.&lt;/span>class&lt;span style="color:#719e07">);&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> service&lt;span style="color:#719e07">.&lt;/span>setRef&lt;span style="color:#719e07">(&lt;/span>&lt;span style="color:#719e07">new&lt;/span> IGreeter1Impl&lt;span style="color:#719e07">());&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75">// 使用 Triple 协议
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span> service&lt;span style="color:#719e07">.&lt;/span>setProtocol&lt;span style="color:#719e07">(&lt;/span>&lt;span style="color:#719e07">new&lt;/span> ProtocolConfig&lt;span style="color:#719e07">(&lt;/span>CommonConstants&lt;span style="color:#719e07">.&lt;/span>TRIPLE&lt;span style="color:#719e07">,&lt;/span> 50051&lt;span style="color:#719e07">));&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> service&lt;span style="color:#719e07">.&lt;/span>setApplication&lt;span style="color:#719e07">(&lt;/span>&lt;span style="color:#719e07">new&lt;/span> ApplicationConfig&lt;span style="color:#719e07">(&lt;/span>&lt;span style="color:#2aa198">&amp;#34;demo-provider&amp;#34;&lt;/span>&lt;span style="color:#719e07">));&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75">// 使用 ZK 作为注册中心
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span> service&lt;span style="color:#719e07">.&lt;/span>setRegistry&lt;span style="color:#719e07">(&lt;/span>&lt;span style="color:#719e07">new&lt;/span> RegistryConfig&lt;span style="color:#719e07">(&lt;/span>&lt;span style="color:#2aa198">&amp;#34;zookeeper://127.0.0.1:2181&amp;#34;&lt;/span>&lt;span style="color:#719e07">));&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> service&lt;span style="color:#719e07">.&lt;/span>export&lt;span style="color:#719e07">();&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> System&lt;span style="color:#719e07">.&lt;/span>out&lt;span style="color:#719e07">.&lt;/span>println&lt;span style="color:#719e07">(&lt;/span>&lt;span style="color:#2aa198">&amp;#34;dubbo service started&amp;#34;&lt;/span>&lt;span style="color:#719e07">);&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">new&lt;/span> CountDownLatch&lt;span style="color:#719e07">(&lt;/span>1&lt;span style="color:#719e07">).&lt;/span>await&lt;span style="color:#719e07">();&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">}&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">}&lt;/span>
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>启动服务，可看到输出如下日志，代表 Java Triple Server 启动成功&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-fallback" data-lang="fallback">&lt;span style="display:flex;">&lt;span>main INFO bootstrap.DubboBootstrap: [DUBBO] DubboBootstrap has started., dubbo version: 3.0.2, current host: 192.168.0.108
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>dubbo service started
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h4 id="go-client-启动">Go-Client 启动&lt;/h4>
&lt;p>对于已经启动的Dubbo服务，如需要开发与其对应的Go-client，需要进行如下步骤：&lt;/p>
&lt;ol>
&lt;li>
&lt;p>编写与 Java 适配的 proto文件&lt;/p>
&lt;p>samples_api.proto&lt;/p>
&lt;/li>
&lt;/ol>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-protobuf" data-lang="protobuf">&lt;span style="display:flex;">&lt;span>syntax &lt;span style="color:#719e07">=&lt;/span> &lt;span style="color:#2aa198">&amp;#34;proto3&amp;#34;&lt;/span>;
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">package&lt;/span> api; &lt;span style="color:#586e75">// pacakge 名随意指定
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// necessary
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>&lt;span style="color:#719e07">option&lt;/span> go_package &lt;span style="color:#719e07">=&lt;/span> &lt;span style="color:#2aa198">&amp;#34;./;api&amp;#34;&lt;/span>;
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// The greeting service definition.
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>&lt;span style="color:#268bd2">service&lt;/span> Greeter {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75">// Sends a greeting
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span> &lt;span style="color:#719e07">rpc&lt;/span> SayHello (HelloRequest) &lt;span style="color:#719e07">returns&lt;/span> (User) {}
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// The request message containing the user&amp;#39;s name.
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>&lt;span style="color:#268bd2">message&lt;/span> &lt;span style="color:#268bd2">HelloRequest&lt;/span> {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#dc322f">string&lt;/span> name &lt;span style="color:#719e07">=&lt;/span> &lt;span style="color:#2aa198">1&lt;/span>;
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// The response message containing the greetings
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>&lt;span style="color:#268bd2">message&lt;/span> &lt;span style="color:#268bd2">User&lt;/span> {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#dc322f">string&lt;/span> name &lt;span style="color:#719e07">=&lt;/span> &lt;span style="color:#2aa198">1&lt;/span>;
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#dc322f">string&lt;/span> id &lt;span style="color:#719e07">=&lt;/span> &lt;span style="color:#2aa198">2&lt;/span>;
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#dc322f">int32&lt;/span> age &lt;span style="color:#719e07">=&lt;/span> &lt;span style="color:#2aa198">3&lt;/span>;
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ol start="2">
&lt;li>使用 protoc-gen-triple 生成接口文件&lt;/li>
&lt;/ol>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-bash" data-lang="bash">&lt;span style="display:flex;">&lt;span>protoc -I . samples_api.proto --triple_out&lt;span style="color:#719e07">=&lt;/span>&lt;span style="color:#268bd2">plugins&lt;/span>&lt;span style="color:#719e07">=&lt;/span>triple:.
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ol start="3">
&lt;li>撰写配置文件: dubbogo.yml&lt;/li>
&lt;/ol>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-yaml" data-lang="yaml">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">dubbo&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">registries&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">demoZK&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">protocol&lt;/span>: zookeeper
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">address&lt;/span>: &lt;span style="color:#2aa198">127.0.0.1&lt;/span>:&lt;span style="color:#2aa198">2181&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">consumer&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">references&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">GreeterClientImpl&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">protocol&lt;/span>: tri
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">interface&lt;/span>: com.apache.dubbo.sample.basic.IGreeter &lt;span style="color:#586e75"># must be compatible with grpc or dubbo-java&lt;/span>
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ol start="4">
&lt;li>撰写 main.go 文件，发起调用&lt;/li>
&lt;/ol>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-go" data-lang="go">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// 引入生成的接口结构
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>&lt;span style="color:#268bd2">var&lt;/span> grpcGreeterImpl = &lt;span style="color:#b58900">new&lt;/span>(api.GreeterClientImpl)
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// export DUBBO_GO_CONFIG_PATH=dubbogo.yml
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>&lt;span style="color:#268bd2">func&lt;/span> &lt;span style="color:#268bd2">main&lt;/span>() {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> config.&lt;span style="color:#268bd2">SetConsumerService&lt;/span>(grpcGreeterImpl)
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">if&lt;/span> err &lt;span style="color:#719e07">:=&lt;/span> config.&lt;span style="color:#268bd2">Load&lt;/span>(); err &lt;span style="color:#719e07">!=&lt;/span> &lt;span style="color:#cb4b16">nil&lt;/span> {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#b58900">panic&lt;/span>(err)
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> }
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> time.&lt;span style="color:#268bd2">Sleep&lt;/span>(&lt;span style="color:#2aa198">3&lt;/span> &lt;span style="color:#719e07">*&lt;/span> time.Second)
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> logger.&lt;span style="color:#268bd2">Info&lt;/span>(&lt;span style="color:#2aa198">&amp;#34;start to test dubbo&amp;#34;&lt;/span>)
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> req &lt;span style="color:#719e07">:=&lt;/span> &lt;span style="color:#719e07">&amp;amp;&lt;/span>api.HelloRequest{
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> Name: &lt;span style="color:#2aa198">&amp;#34;laurence&amp;#34;&lt;/span>,
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> }
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> reply, err &lt;span style="color:#719e07">:=&lt;/span> grpcGreeterImpl.&lt;span style="color:#268bd2">SayHello&lt;/span>(context.&lt;span style="color:#268bd2">Background&lt;/span>(), req)
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">if&lt;/span> err &lt;span style="color:#719e07">!=&lt;/span> &lt;span style="color:#cb4b16">nil&lt;/span> {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> logger.&lt;span style="color:#268bd2">Error&lt;/span>(err)
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> }
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> logger.&lt;span style="color:#268bd2">Infof&lt;/span>(&lt;span style="color:#2aa198">&amp;#34;client response result: %v\n&amp;#34;&lt;/span>, reply)
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ol start="5">
&lt;li>可查看到调用成功的日志&lt;/li>
&lt;/ol>
&lt;ul>
&lt;li>go-client&lt;/li>
&lt;/ul>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-fallback" data-lang="fallback">&lt;span style="display:flex;">&lt;span>cmd/client.go:53 client response result: name:&amp;#34;hello laurence&amp;#34; id:&amp;#34;12345&amp;#34; age:18
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
&lt;li>java-server&lt;/li>
&lt;/ul>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-fallback" data-lang="fallback">&lt;span style="display:flex;">&lt;span>receiv: name: &amp;#34;laurence&amp;#34;
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h3 id="12-java-client---go-server">1.2 Java-Client -&amp;gt; Go-Server&lt;/h3>
&lt;h4 id="go-server-启动">Go-Server 启动&lt;/h4>
&lt;ol>
&lt;li>定义配置文件&lt;/li>
&lt;/ol>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-yaml" data-lang="yaml">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">dubbo&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">registries&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">demoZK&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">protocol&lt;/span>: zookeeper
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">address&lt;/span>: &lt;span style="color:#2aa198">127.0.0.1&lt;/span>:&lt;span style="color:#2aa198">2181&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">protocols&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">triple&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">name&lt;/span>: tri
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">port&lt;/span>: &lt;span style="color:#2aa198">20000&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">provider&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">services&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">GreeterProvider&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">interface&lt;/span>: com.apache.dubbo.sample.basic.IGreeter &lt;span style="color:#586e75"># must be compatible with grpc or dubbo-java&lt;/span>
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ol start="2">
&lt;li>引入传输结构，定义服务&lt;/li>
&lt;/ol>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-go" data-lang="go">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">type&lt;/span> GreeterProvider &lt;span style="color:#268bd2">struct&lt;/span> {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> api.GreeterProviderBase
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">func&lt;/span> (s &lt;span style="color:#719e07">*&lt;/span>GreeterProvider) &lt;span style="color:#268bd2">SayHello&lt;/span>(ctx context.Context, in &lt;span style="color:#719e07">*&lt;/span>api.HelloRequest) (&lt;span style="color:#719e07">*&lt;/span>api.User, &lt;span style="color:#dc322f">error&lt;/span>) {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> logger.&lt;span style="color:#268bd2">Infof&lt;/span>(&lt;span style="color:#2aa198">&amp;#34;Dubbo3 GreeterProvider get user name = %s\n&amp;#34;&lt;/span>, in.Name)
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">return&lt;/span> &lt;span style="color:#719e07">&amp;amp;&lt;/span>api.User{Name: &lt;span style="color:#2aa198">&amp;#34;Hello &amp;#34;&lt;/span> &lt;span style="color:#719e07">+&lt;/span> in.Name, Id: &lt;span style="color:#2aa198">&amp;#34;12345&amp;#34;&lt;/span>, Age: &lt;span style="color:#2aa198">21&lt;/span>}, &lt;span style="color:#cb4b16">nil&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ol start="3">
&lt;li>启动服务&lt;/li>
&lt;/ol>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-go" data-lang="go">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// export DUBBO_GO_CONFIG_PATH=dubbogo.yml
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>&lt;span style="color:#268bd2">func&lt;/span> &lt;span style="color:#268bd2">main&lt;/span>() {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> config.&lt;span style="color:#268bd2">SetProviderService&lt;/span>(&lt;span style="color:#719e07">&amp;amp;&lt;/span>GreeterProvider{})
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">if&lt;/span> err &lt;span style="color:#719e07">:=&lt;/span> config.&lt;span style="color:#268bd2">Load&lt;/span>(); err &lt;span style="color:#719e07">!=&lt;/span> &lt;span style="color:#cb4b16">nil&lt;/span> {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#b58900">panic&lt;/span>(err)
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> }
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">select&lt;/span> {}
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h4 id="java-client-启动">Java-Client 启动&lt;/h4>
&lt;ol>
&lt;li>
&lt;p>proto 文件编写和接口生成参考上述 java-server 介绍&lt;/p>
&lt;/li>
&lt;li>
&lt;p>启动Consumer&lt;/p>
&lt;p>ApiCnosumer.java&lt;/p>
&lt;/li>
&lt;/ol>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-java" data-lang="java">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">public&lt;/span> &lt;span style="color:#268bd2">class&lt;/span> &lt;span style="color:#268bd2">ApiConsumer&lt;/span> &lt;span style="color:#719e07">{&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">public&lt;/span> &lt;span style="color:#268bd2">static&lt;/span> &lt;span style="color:#dc322f">void&lt;/span> &lt;span style="color:#268bd2">main&lt;/span>&lt;span style="color:#719e07">(&lt;/span>String&lt;span style="color:#719e07">[]&lt;/span> args&lt;span style="color:#719e07">)&lt;/span> &lt;span style="color:#268bd2">throws&lt;/span> InterruptedException&lt;span style="color:#719e07">,&lt;/span> IOException &lt;span style="color:#719e07">{&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> ReferenceConfig&lt;span style="color:#719e07">&amp;lt;&lt;/span>IGreeter&lt;span style="color:#719e07">&amp;gt;&lt;/span> ref &lt;span style="color:#719e07">=&lt;/span> &lt;span style="color:#719e07">new&lt;/span> ReferenceConfig&lt;span style="color:#719e07">&amp;lt;&amp;gt;();&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> ref&lt;span style="color:#719e07">.&lt;/span>setInterface&lt;span style="color:#719e07">(&lt;/span>IGreeter&lt;span style="color:#719e07">.&lt;/span>class&lt;span style="color:#719e07">);&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> ref&lt;span style="color:#719e07">.&lt;/span>setCheck&lt;span style="color:#719e07">(&lt;/span>&lt;span style="color:#cb4b16">false&lt;/span>&lt;span style="color:#719e07">);&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> ref&lt;span style="color:#719e07">.&lt;/span>setProtocol&lt;span style="color:#719e07">(&lt;/span>CommonConstants&lt;span style="color:#719e07">.&lt;/span>TRIPLE&lt;span style="color:#719e07">);&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> ref&lt;span style="color:#719e07">.&lt;/span>setLazy&lt;span style="color:#719e07">(&lt;/span>&lt;span style="color:#cb4b16">true&lt;/span>&lt;span style="color:#719e07">);&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> ref&lt;span style="color:#719e07">.&lt;/span>setTimeout&lt;span style="color:#719e07">(&lt;/span>100000&lt;span style="color:#719e07">);&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> ref&lt;span style="color:#719e07">.&lt;/span>setApplication&lt;span style="color:#719e07">(&lt;/span>&lt;span style="color:#719e07">new&lt;/span> ApplicationConfig&lt;span style="color:#719e07">(&lt;/span>&lt;span style="color:#2aa198">&amp;#34;demo-consumer&amp;#34;&lt;/span>&lt;span style="color:#719e07">));&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> ref&lt;span style="color:#719e07">.&lt;/span>setRegistry&lt;span style="color:#719e07">(&lt;/span>&lt;span style="color:#719e07">new&lt;/span> RegistryConfig&lt;span style="color:#719e07">(&lt;/span>&lt;span style="color:#2aa198">&amp;#34;zookeeper://127.0.0.1:2181&amp;#34;&lt;/span>&lt;span style="color:#719e07">));&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">final&lt;/span> IGreeter iGreeter &lt;span style="color:#719e07">=&lt;/span> ref&lt;span style="color:#719e07">.&lt;/span>get&lt;span style="color:#719e07">();&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> System&lt;span style="color:#719e07">.&lt;/span>out&lt;span style="color:#719e07">.&lt;/span>println&lt;span style="color:#719e07">(&lt;/span>&lt;span style="color:#2aa198">&amp;#34;dubbo ref started&amp;#34;&lt;/span>&lt;span style="color:#719e07">);&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> Helloworld&lt;span style="color:#719e07">.&lt;/span>HelloRequest req &lt;span style="color:#719e07">=&lt;/span> Helloworld&lt;span style="color:#719e07">.&lt;/span>HelloRequest&lt;span style="color:#719e07">.&lt;/span>newBuilder&lt;span style="color:#719e07">().&lt;/span>setName&lt;span style="color:#719e07">(&lt;/span>&lt;span style="color:#2aa198">&amp;#34;laurence&amp;#34;&lt;/span>&lt;span style="color:#719e07">).&lt;/span>build&lt;span style="color:#719e07">();&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">try&lt;/span> &lt;span style="color:#719e07">{&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">final&lt;/span> Helloworld&lt;span style="color:#719e07">.&lt;/span>User reply &lt;span style="color:#719e07">=&lt;/span> iGreeter&lt;span style="color:#719e07">.&lt;/span>sayHello&lt;span style="color:#719e07">(&lt;/span>req&lt;span style="color:#719e07">);&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> TimeUnit&lt;span style="color:#719e07">.&lt;/span>SECONDS&lt;span style="color:#719e07">.&lt;/span>sleep&lt;span style="color:#719e07">(&lt;/span>1&lt;span style="color:#719e07">);&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> System&lt;span style="color:#719e07">.&lt;/span>out&lt;span style="color:#719e07">.&lt;/span>println&lt;span style="color:#719e07">(&lt;/span>&lt;span style="color:#2aa198">&amp;#34;Reply:&amp;#34;&lt;/span> &lt;span style="color:#719e07">+&lt;/span> reply&lt;span style="color:#719e07">);&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">}&lt;/span> &lt;span style="color:#719e07">catch&lt;/span> &lt;span style="color:#719e07">(&lt;/span>Throwable t&lt;span style="color:#719e07">)&lt;/span> &lt;span style="color:#719e07">{&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> t&lt;span style="color:#719e07">.&lt;/span>printStackTrace&lt;span style="color:#719e07">();&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">}&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> System&lt;span style="color:#719e07">.&lt;/span>in&lt;span style="color:#719e07">.&lt;/span>read&lt;span style="color:#719e07">();&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">}&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">}&lt;/span>
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="2-基于-dubbo-协议互通-hessian2序列化">2. 基于 Dubbo 协议互通 (Hessian2序列化)&lt;/h2>
&lt;p>参考 &lt;a href="https://github.com/apache/dubbo-go-samples/tree/master/rpc/dubbo">dubbo-go-samples/rpc/dubbo&lt;/a>&lt;/p>
&lt;h3 id="21-go-client---java-server">2.1 Go-Client -&amp;gt; Java-Server&lt;/h3>
&lt;h4 id="java-server-启动-1">Java-Server 启动&lt;/h4>
&lt;ol>
&lt;li>定义 Java 接口、参数和返回值，可参考 &lt;a href="https://dubbo.apache.org/zh-cn/docs/quick-start/">Dubbo 快速开始&lt;/a>&lt;/li>
&lt;/ol>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-java" data-lang="java">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">package&lt;/span> org.apache.dubbo&lt;span style="color:#719e07">;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// 需要暴露的服务接口
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>&lt;span style="color:#268bd2">public&lt;/span> &lt;span style="color:#268bd2">interface&lt;/span> &lt;span style="color:#268bd2">UserProvider&lt;/span> &lt;span style="color:#719e07">{&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> User &lt;span style="color:#268bd2">getUser&lt;/span>&lt;span style="color:#719e07">(&lt;/span>&lt;span style="color:#dc322f">int&lt;/span> usercode&lt;span style="color:#719e07">);&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">}&lt;/span>
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-java" data-lang="java">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">package&lt;/span> org.apache.dubbo&lt;span style="color:#719e07">;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">public&lt;/span> &lt;span style="color:#268bd2">class&lt;/span> &lt;span style="color:#268bd2">User&lt;/span> &lt;span style="color:#268bd2">implements&lt;/span> Serializable &lt;span style="color:#719e07">{&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">private&lt;/span> String id&lt;span style="color:#719e07">;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">private&lt;/span> String name&lt;span style="color:#719e07">;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">private&lt;/span> &lt;span style="color:#dc322f">int&lt;/span> age&lt;span style="color:#719e07">;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">private&lt;/span> Date time &lt;span style="color:#719e07">=&lt;/span> &lt;span style="color:#719e07">new&lt;/span> Date&lt;span style="color:#719e07">();&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75">/* ... */&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">}&lt;/span>
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ol start="2">
&lt;li>实现服务接口:&lt;/li>
&lt;/ol>
&lt;p>UserProviderImpl.java&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-java" data-lang="java">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">package&lt;/span> org.apache.dubbo&lt;span style="color:#719e07">;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">public&lt;/span> &lt;span style="color:#268bd2">class&lt;/span> &lt;span style="color:#268bd2">UserProviderImpl&lt;/span> &lt;span style="color:#268bd2">implements&lt;/span> UserProvider &lt;span style="color:#719e07">{&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">public&lt;/span> User &lt;span style="color:#268bd2">getUser&lt;/span>&lt;span style="color:#719e07">(&lt;/span>&lt;span style="color:#dc322f">int&lt;/span> userCode&lt;span style="color:#719e07">)&lt;/span> &lt;span style="color:#719e07">{&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">return&lt;/span> &lt;span style="color:#719e07">new&lt;/span> User&lt;span style="color:#719e07">(&lt;/span>String&lt;span style="color:#719e07">.&lt;/span>valueOf&lt;span style="color:#719e07">(&lt;/span>userCode&lt;span style="color:#719e07">),&lt;/span> &lt;span style="color:#2aa198">&amp;#34;userCode get&amp;#34;&lt;/span>&lt;span style="color:#719e07">,&lt;/span> 48&lt;span style="color:#719e07">);&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">}&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">}&lt;/span>
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ol start="3">
&lt;li>使用SpringBoot 启动&lt;/li>
&lt;/ol>
&lt;p>Provider.java&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-java" data-lang="java">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">package&lt;/span> org.apache.dubbo&lt;span style="color:#719e07">;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// use when config by API
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>&lt;span style="color:#586e75">/*
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">import java.util.concurrent.CountDownLatch;
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">import org.apache.dubbo.common.constants.CommonConstants;
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">import org.apache.dubbo.config.ApplicationConfig;
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">import org.apache.dubbo.config.ProtocolConfig;
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">import org.apache.dubbo.config.RegistryConfig;
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">import org.apache.dubbo.config.ServiceConfig;
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">*/&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">import&lt;/span> org.springframework.context.support.ClassPathXmlApplicationContext&lt;span style="color:#719e07">;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">public&lt;/span> &lt;span style="color:#268bd2">class&lt;/span> &lt;span style="color:#268bd2">Provider&lt;/span> &lt;span style="color:#719e07">{&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75">// main function, config from spring boot
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span> &lt;span style="color:#268bd2">public&lt;/span> &lt;span style="color:#268bd2">static&lt;/span> &lt;span style="color:#dc322f">void&lt;/span> &lt;span style="color:#268bd2">main&lt;/span>&lt;span style="color:#719e07">(&lt;/span>String&lt;span style="color:#719e07">[]&lt;/span> args&lt;span style="color:#719e07">)&lt;/span> &lt;span style="color:#268bd2">throws&lt;/span> Exception &lt;span style="color:#719e07">{&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> ClassPathXmlApplicationContext context &lt;span style="color:#719e07">=&lt;/span> &lt;span style="color:#719e07">new&lt;/span> ClassPathXmlApplicationContext&lt;span style="color:#719e07">(&lt;/span>&lt;span style="color:#719e07">new&lt;/span> String&lt;span style="color:#719e07">[]{&lt;/span>&lt;span style="color:#2aa198">&amp;#34;META-INF/spring/dubbo.provider.xml&amp;#34;&lt;/span>&lt;span style="color:#719e07">});&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> context&lt;span style="color:#719e07">.&lt;/span>start&lt;span style="color:#719e07">();&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> System&lt;span style="color:#719e07">.&lt;/span>in&lt;span style="color:#719e07">.&lt;/span>read&lt;span style="color:#719e07">();&lt;/span> &lt;span style="color:#586e75">// press any key to exit
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span> &lt;span style="color:#719e07">}&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// config by API
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// public static void startComplexService() throws InterruptedException {
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// ServiceConfig&amp;lt;ComplexProvider&amp;gt; service = new ServiceConfig&amp;lt;&amp;gt;();
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// service.setInterface(ComplexProvider.class);
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// service.setRef(new ComplexProviderImpl());
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// service.setProtocol(new ProtocolConfig(CommonConstants.DUBBO_PROTOCOL, 20001));
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// service.setApplication(new ApplicationConfig(&amp;#34;demo-provider&amp;#34;));
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// service.setRegistry(new RegistryConfig(&amp;#34;zookeeper://127.0.0.1:2181&amp;#34;));
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// service.export();
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// System.out.println(&amp;#34;dubbo service started&amp;#34;);
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// new CountDownLatch(1).await();
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// }
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>&lt;span style="color:#719e07">}&lt;/span>
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ol start="4">
&lt;li>
&lt;p>通过Spring 配置 Dubbo 参数&lt;/p>
&lt;p>Resources/META-INF.spring/dubbo.provider.xml&lt;/p>
&lt;/li>
&lt;/ol>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-xml" data-lang="xml">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">&amp;lt;?xml version=&amp;#34;1.0&amp;#34; encoding=&amp;#34;UTF-8&amp;#34;?&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&amp;lt;!--
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75"> Licensed under the Apache License, Version 2.0 (the &amp;#34;License&amp;#34;);
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75"> you may not use this file except in compliance with the License.
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75"> You may obtain a copy of the License at
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75"> http://www.apache.org/licenses/LICENSE-2.0
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75"> Unless required by applicable law or agreed to in writing, software
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75"> distributed under the License is distributed on an &amp;#34;AS IS&amp;#34; BASIS,
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75"> WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75"> See the License for the specific language governing permissions and
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75"> limitations under the License.
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">--&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">&amp;lt;beans&lt;/span> xmlns=&lt;span style="color:#2aa198">&amp;#34;http://www.springframework.org/schema/beans&amp;#34;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> xmlns:xsi=&lt;span style="color:#2aa198">&amp;#34;http://www.w3.org/2001/XMLSchema-instance&amp;#34;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> xmlns:dubbo=&lt;span style="color:#2aa198">&amp;#34;http://code.alibabatech.com/schema/dubbo&amp;#34;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> xsi:schemaLocation=&lt;span style="color:#2aa198">&amp;#34;http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#2aa198"> http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd&amp;#34;&lt;/span>&lt;span style="color:#268bd2">&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75">&amp;lt;!-- 应用名 --&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">&amp;lt;dubbo:application&lt;/span> name=&lt;span style="color:#2aa198">&amp;#34;user-info-server&amp;#34;&lt;/span>&lt;span style="color:#268bd2">/&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75">&amp;lt;!-- 连接到哪个本地注册中心 --&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">&amp;lt;dubbo:registry&lt;/span> id=&lt;span style="color:#2aa198">&amp;#34;dubbogo&amp;#34;&lt;/span> address=&lt;span style="color:#2aa198">&amp;#34;zookeeper://127.0.0.1:2181&amp;#34;&lt;/span> &lt;span style="color:#268bd2">/&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75">&amp;lt;!-- 用dubbo协议在20880端口暴露服务 --&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">&amp;lt;dubbo:protocol&lt;/span> id=&lt;span style="color:#2aa198">&amp;#34;dubbo&amp;#34;&lt;/span> name=&lt;span style="color:#2aa198">&amp;#34;dubbo&amp;#34;&lt;/span> host=&lt;span style="color:#2aa198">&amp;#34;127.0.0.1&amp;#34;&lt;/span> port=&lt;span style="color:#2aa198">&amp;#34;20010&amp;#34;&lt;/span> &lt;span style="color:#268bd2">/&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75">&amp;lt;!-- 声明需要暴露的服务接口 --&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">&amp;lt;dubbo:service&lt;/span> id=&lt;span style="color:#2aa198">&amp;#34;aaa&amp;#34;&lt;/span> registry=&lt;span style="color:#2aa198">&amp;#34;dubbogo&amp;#34;&lt;/span> timeout=&lt;span style="color:#2aa198">&amp;#34;3000&amp;#34;&lt;/span> interface=&lt;span style="color:#2aa198">&amp;#34;org.apache.dubbo.UserProvider&amp;#34;&lt;/span> ref=&lt;span style="color:#2aa198">&amp;#34;demoService&amp;#34;&lt;/span>&lt;span style="color:#268bd2">/&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">&amp;lt;dubbo:service&lt;/span> id=&lt;span style="color:#2aa198">&amp;#34;bbb&amp;#34;&lt;/span> registry=&lt;span style="color:#2aa198">&amp;#34;dubbogo&amp;#34;&lt;/span> timeout=&lt;span style="color:#2aa198">&amp;#34;3000&amp;#34;&lt;/span> interface=&lt;span style="color:#2aa198">&amp;#34;org.apache.dubbo.UserProvider&amp;#34;&lt;/span> ref=&lt;span style="color:#2aa198">&amp;#34;otherService&amp;#34;&lt;/span> version=&lt;span style="color:#2aa198">&amp;#34;2.0&amp;#34;&lt;/span>&lt;span style="color:#268bd2">/&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">&amp;lt;dubbo:service&lt;/span> id=&lt;span style="color:#2aa198">&amp;#34;ccc&amp;#34;&lt;/span> registry=&lt;span style="color:#2aa198">&amp;#34;dubbogo&amp;#34;&lt;/span> timeout=&lt;span style="color:#2aa198">&amp;#34;3000&amp;#34;&lt;/span> interface=&lt;span style="color:#2aa198">&amp;#34;org.apache.dubbo.UserProvider&amp;#34;&lt;/span> ref=&lt;span style="color:#2aa198">&amp;#34;otherService&amp;#34;&lt;/span> group=&lt;span style="color:#2aa198">&amp;#34;as&amp;#34;&lt;/span> version=&lt;span style="color:#2aa198">&amp;#34;2.0&amp;#34;&lt;/span>&lt;span style="color:#268bd2">/&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">&amp;lt;bean&lt;/span> id=&lt;span style="color:#2aa198">&amp;#34;demoService&amp;#34;&lt;/span> class=&lt;span style="color:#2aa198">&amp;#34;org.apache.dubbo.UserProviderImpl&amp;#34;&lt;/span> &lt;span style="color:#268bd2">/&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">&amp;lt;bean&lt;/span> id=&lt;span style="color:#2aa198">&amp;#34;otherService&amp;#34;&lt;/span> class=&lt;span style="color:#2aa198">&amp;#34;org.apache.dubbo.UserProviderAnotherImpl&amp;#34;&lt;/span>&lt;span style="color:#268bd2">/&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">&amp;lt;/beans&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>启动Provider类，可看到输出如下日志，代表 Dubbo Server 启动成功&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-fallback" data-lang="fallback">&lt;span style="display:flex;">&lt;span>[DUBBO] DubboBootstrap is ready., dubbo version: 2.7.7, current host: 127.0.0.1
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>[DUBBO] DubboBootstrap has started., dubbo version: 2.7.7, current host: 127.0.0.1
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h4 id="go-client-启动-1">Go-Client 启动&lt;/h4>
&lt;p>对于已经启动的Dubbo服务，如需要开发与其对应的Go-client，需要进行如下步骤：&lt;/p>
&lt;ol>
&lt;li>编写与 Java 适配的 POJO 类 User&lt;/li>
&lt;/ol>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-go" data-lang="go">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">import&lt;/span>(
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> hessian &lt;span style="color:#2aa198">&amp;#34;github.com/apache/dubbo-go-hessian2&amp;#34;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>)
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// 字段需要与 Java 侧对应，首字母大写
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>&lt;span style="color:#268bd2">type&lt;/span> User &lt;span style="color:#268bd2">struct&lt;/span> {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> ID &lt;span style="color:#dc322f">string&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> Name &lt;span style="color:#dc322f">string&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> Age &lt;span style="color:#dc322f">int32&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> Time time.Time
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">func&lt;/span> (u &lt;span style="color:#719e07">*&lt;/span>User) &lt;span style="color:#268bd2">JavaClassName&lt;/span>() &lt;span style="color:#dc322f">string&lt;/span> {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">return&lt;/span> &lt;span style="color:#2aa198">&amp;#34;org.apache.dubbo.User&amp;#34;&lt;/span> &lt;span style="color:#586e75">// 需要与 Java 侧 User 类名对应
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>}
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">func&lt;/span> &lt;span style="color:#268bd2">init&lt;/span>(){
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> hessian.&lt;span style="color:#268bd2">RegisterPOJO&lt;/span>(&lt;span style="color:#719e07">&amp;amp;&lt;/span>pkg.User{}) &lt;span style="color:#586e75">// 注册 POJO
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>}
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ol start="2">
&lt;li>
&lt;p>编写与 Java 侧一致的客户端存根类，其接口方法需要与Java侧对应&lt;/p>
&lt;p>规定第一个参数必须为 context.Context，最后一个返回值必须为 error&lt;/p>
&lt;/li>
&lt;/ol>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-go" data-lang="go">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">import&lt;/span>(
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#2aa198">&amp;#34;dubbo.apache.org/dubbo-go/v3/config&amp;#34;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>)
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">var&lt;/span> (
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> userProvider = &lt;span style="color:#719e07">&amp;amp;&lt;/span>pkg.UserProvider{}
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>)
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// UserProvider 客户端存根类
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>&lt;span style="color:#268bd2">type&lt;/span> UserProvider &lt;span style="color:#268bd2">struct&lt;/span> {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75">// dubbo标签，用于适配go侧客户端大写方法名 -&amp;gt; java侧小写方法名，只有 dubbo 协议客户端才需要使用
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span> GetUser &lt;span style="color:#268bd2">func&lt;/span>(ctx context.Context, req &lt;span style="color:#dc322f">int32&lt;/span>) (&lt;span style="color:#719e07">*&lt;/span>User, &lt;span style="color:#dc322f">error&lt;/span>) &lt;span style="color:#2aa198">`dubbo:&amp;#34;getUser&amp;#34;`&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">func&lt;/span> &lt;span style="color:#268bd2">init&lt;/span>(){
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75">// 注册客户端存根类到框架，实例化客户端接口指针 userProvider
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span> config.&lt;span style="color:#268bd2">SetConsumerService&lt;/span>(userProvider)
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ol start="3">
&lt;li>撰写配置文件: dubbogo.yml&lt;/li>
&lt;/ol>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-yaml" data-lang="yaml">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">dubbo&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">registries&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">demoZK&lt;/span>: &lt;span style="color:#586e75"># 定义注册中心ID&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">protocol&lt;/span>: zookeeper
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">timeout&lt;/span>: 3s
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">address&lt;/span>: &lt;span style="color:#2aa198">127.0.0.1&lt;/span>:&lt;span style="color:#2aa198">2181&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">consumer&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">references&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">UserProvider&lt;/span>: &lt;span style="color:#586e75"># 存根类名&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">protocol&lt;/span>: dubbo &lt;span style="color:#586e75"># dubbo 协议，默认 hessian2 序列化方式&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">interface&lt;/span>: org.apache.dubbo.UserProvider &lt;span style="color:#586e75"># 接口需要与Java侧对应&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">logger&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">zap-config&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">level&lt;/span>: info &lt;span style="color:#586e75"># 日志级别&lt;/span>
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>或者使用Triple + Hessian2 序列化请求Server。本例子如果跟Java Server互通则不能用Triple。&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-yaml" data-lang="yaml">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">dubbo&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">registries&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">demoZK&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">protocol&lt;/span>: zookeeper
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">timeout&lt;/span>: 3s
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">address&lt;/span>: &lt;span style="color:#2aa198">127.0.0.1&lt;/span>:&lt;span style="color:#2aa198">2181&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">consumer&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">references&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">UserProvider&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">protocol&lt;/span>: tri &lt;span style="color:#586e75"># triple 协议&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">serialization&lt;/span>: hessian2 &lt;span style="color:#586e75"># 序列化方式 hessian2，triple 协议默认为 pb 序列化，不配置会报错&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">interface&lt;/span>: org.apache.dubbo.UserProvider
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">logger&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">zap-config&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">level&lt;/span>: info
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ol start="4">
&lt;li>撰写 main.go 文件，发起调用&lt;/li>
&lt;/ol>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-go" data-lang="go">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">func&lt;/span> &lt;span style="color:#268bd2">main&lt;/span>(){
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> config.&lt;span style="color:#268bd2">Load&lt;/span>()
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">var&lt;/span> i &lt;span style="color:#dc322f">int32&lt;/span> = &lt;span style="color:#2aa198">1&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> user, err &lt;span style="color:#719e07">:=&lt;/span> userProvider.&lt;span style="color:#268bd2">GetUser2&lt;/span>(context.&lt;span style="color:#268bd2">TODO&lt;/span>(), i)
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">if&lt;/span> err &lt;span style="color:#719e07">!=&lt;/span> &lt;span style="color:#cb4b16">nil&lt;/span> {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#b58900">panic&lt;/span>(err)
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> }
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> logger.&lt;span style="color:#268bd2">Infof&lt;/span>(&lt;span style="color:#2aa198">&amp;#34;response result: %v&amp;#34;&lt;/span>, user)
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ol start="5">
&lt;li>可查看到调用成功的日志,符合预期&lt;/li>
&lt;/ol>
&lt;ul>
&lt;li>go-client&lt;/li>
&lt;/ul>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-bash" data-lang="bash">&lt;span style="display:flex;">&lt;span>response result: User&lt;span style="color:#719e07">{&lt;/span>ID:1, Name:userCode get, Age:48, Time:2021-10-21 20:25:26.009 +0800 CST&lt;span style="color:#719e07">}&lt;/span>
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h3 id="22-java-client---go-server">2.2 Java-Client -&amp;gt; Go-Server&lt;/h3>
&lt;h4 id="go-server-启动-1">Go-Server 启动&lt;/h4>
&lt;ol>
&lt;li>定义配置文件&lt;/li>
&lt;/ol>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-yaml" data-lang="yaml">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">dubbo&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">registries&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">demoZK&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">protocol&lt;/span>: zookeeper
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">address&lt;/span>: &lt;span style="color:#2aa198">127.0.0.1&lt;/span>:&lt;span style="color:#2aa198">2181&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">protocols&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">dubbo&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">name&lt;/span>: dubbo
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">port&lt;/span>: &lt;span style="color:#2aa198">20000&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">provider&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">services&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">UserProvider&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">interface&lt;/span>: org.apache.dubbo.UserProvider
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">logger&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">zap-config&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">level&lt;/span>: info
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ol start="2">
&lt;li>引入传输结构，定义服务以及方法名映射&lt;/li>
&lt;/ol>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-go" data-lang="go">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">type&lt;/span> UserProvider &lt;span style="color:#268bd2">struct&lt;/span> {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">func&lt;/span> (u &lt;span style="color:#719e07">*&lt;/span>UserProvider) &lt;span style="color:#268bd2">GetUser&lt;/span>(ctx context.Context, req &lt;span style="color:#dc322f">int32&lt;/span>) (&lt;span style="color:#719e07">*&lt;/span>User, &lt;span style="color:#dc322f">error&lt;/span>) {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">var&lt;/span> err &lt;span style="color:#dc322f">error&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> logger.&lt;span style="color:#268bd2">Infof&lt;/span>(&lt;span style="color:#2aa198">&amp;#34;req:%#v&amp;#34;&lt;/span>, req)
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> user &lt;span style="color:#719e07">:=&lt;/span> &lt;span style="color:#719e07">&amp;amp;&lt;/span>User{}
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> user.ID = strconv.&lt;span style="color:#268bd2">Itoa&lt;/span>(&lt;span style="color:#b58900">int&lt;/span>(req))
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">return&lt;/span> user, err
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// MethodMapper 定义方法名映射，从 Go 的方法名映射到 Java 小写方法名，只有 dubbo 协议服务接口才需要使用
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>&lt;span style="color:#268bd2">func&lt;/span> (s &lt;span style="color:#719e07">*&lt;/span>UserProvider) &lt;span style="color:#268bd2">MethodMapper&lt;/span>() &lt;span style="color:#268bd2">map&lt;/span>[&lt;span style="color:#dc322f">string&lt;/span>]&lt;span style="color:#dc322f">string&lt;/span> {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">return&lt;/span> &lt;span style="color:#268bd2">map&lt;/span>[&lt;span style="color:#dc322f">string&lt;/span>]&lt;span style="color:#dc322f">string&lt;/span>{
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#2aa198">&amp;#34;GetUser&amp;#34;&lt;/span>: &lt;span style="color:#2aa198">&amp;#34;getUser&amp;#34;&lt;/span>,
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> }
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">func&lt;/span> &lt;span style="color:#268bd2">init&lt;/span>(){
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> config.&lt;span style="color:#268bd2">SetProviderService&lt;/span>(&lt;span style="color:#719e07">&amp;amp;&lt;/span>pkg.UserProvider{})
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ol start="3">
&lt;li>启动服务&lt;/li>
&lt;/ol>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-go" data-lang="go">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// export DUBBO_GO_CONFIG_PATH=dubbogo.yml
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>&lt;span style="color:#268bd2">func&lt;/span> &lt;span style="color:#268bd2">main&lt;/span>() {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">if&lt;/span> err &lt;span style="color:#719e07">:=&lt;/span> config.&lt;span style="color:#268bd2">Load&lt;/span>(); err &lt;span style="color:#719e07">!=&lt;/span> &lt;span style="color:#cb4b16">nil&lt;/span> {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#b58900">panic&lt;/span>(err)
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> }
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">select&lt;/span> {}
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h4 id="java-client-启动-1">Java-Client 启动&lt;/h4>
&lt;ol>
&lt;li>
&lt;p>Java 客户端 Spring 配置&lt;/p>
&lt;p>resources/META-INF.spring/dubbo.consumer.xml&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-xml" data-lang="xml">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">&amp;lt;?xml version=&amp;#34;1.0&amp;#34; encoding=&amp;#34;UTF-8&amp;#34;?&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&amp;lt;!--
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75"> Licensed under the Apache License, Version 2.0 (the &amp;#34;License&amp;#34;);
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75"> you may not use this file except in compliance with the License.
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75"> You may obtain a copy of the License at
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75"> http://www.apache.org/licenses/LICENSE-2.0
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75"> Unless required by applicable law or agreed to in writing, software
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75"> distributed under the License is distributed on an &amp;#34;AS IS&amp;#34; BASIS,
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75"> WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75"> See the License for the specific language governing permissions and
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75"> limitations under the License.
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">--&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">&amp;lt;beans&lt;/span> xmlns=&lt;span style="color:#2aa198">&amp;#34;http://www.springframework.org/schema/beans&amp;#34;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> xmlns:xsi=&lt;span style="color:#2aa198">&amp;#34;http://www.w3.org/2001/XMLSchema-instance&amp;#34;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> xmlns:dubbo=&lt;span style="color:#2aa198">&amp;#34;http://code.alibabatech.com/schema/dubbo&amp;#34;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> xsi:schemaLocation=&lt;span style="color:#2aa198">&amp;#34;http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#2aa198"> http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd&amp;#34;&lt;/span>&lt;span style="color:#268bd2">&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75">&amp;lt;!-- 消费方应用名，用于计算依赖关系，不是匹配条件，不要与提供方一样 --&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">&amp;lt;dubbo:application&lt;/span> name=&lt;span style="color:#2aa198">&amp;#34;user-info-client&amp;#34;&lt;/span> &lt;span style="color:#268bd2">/&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75">&amp;lt;!-- 连接到哪个本地注册中心 --&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">&amp;lt;dubbo:registry&lt;/span> id=&lt;span style="color:#2aa198">&amp;#34;dubbogo&amp;#34;&lt;/span> address=&lt;span style="color:#2aa198">&amp;#34;zookeeper://127.0.0.1:2181&amp;#34;&lt;/span> &lt;span style="color:#268bd2">/&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75">&amp;lt;!-- dubbo.registry.address from dubbo.properties --&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75">&amp;lt;!-- dubbo:registry address=&amp;#34;${dubbo.registry.address}&amp;#34; / --&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75">&amp;lt;!-- 用dubbo协议在20880端口暴露服务 --&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">&amp;lt;dubbo:protocol&lt;/span> id=&lt;span style="color:#2aa198">&amp;#34;dubbo&amp;#34;&lt;/span> name=&lt;span style="color:#2aa198">&amp;#34;dubbo&amp;#34;&lt;/span> &lt;span style="color:#268bd2">/&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75">&amp;lt;!-- 声明需要使用的服务接口 --&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">&amp;lt;dubbo:reference&lt;/span> registry=&lt;span style="color:#2aa198">&amp;#34;dubbogo&amp;#34;&lt;/span> check=&lt;span style="color:#2aa198">&amp;#34;false&amp;#34;&lt;/span> id=&lt;span style="color:#2aa198">&amp;#34;userProvider&amp;#34;&lt;/span> protocol=&lt;span style="color:#2aa198">&amp;#34;dubbo&amp;#34;&lt;/span> interface=&lt;span style="color:#2aa198">&amp;#34;org.apache.dubbo.UserProvider&amp;#34;&lt;/span>&lt;span style="color:#268bd2">&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75">&amp;lt;!--&amp;lt;dubbo:parameter key=&amp;#34;heartbeat&amp;#34; value=&amp;#34;10000&amp;#34;/ --&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">&amp;lt;/dubbo:reference&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">&amp;lt;dubbo:reference&lt;/span> registry=&lt;span style="color:#2aa198">&amp;#34;dubbogo&amp;#34;&lt;/span> check=&lt;span style="color:#2aa198">&amp;#34;false&amp;#34;&lt;/span> id=&lt;span style="color:#2aa198">&amp;#34;userProvider1&amp;#34;&lt;/span> protocol=&lt;span style="color:#2aa198">&amp;#34;dubbo&amp;#34;&lt;/span> version=&lt;span style="color:#2aa198">&amp;#34;2.0&amp;#34;&lt;/span> interface=&lt;span style="color:#2aa198">&amp;#34;org.apache.dubbo.UserProvider&amp;#34;&lt;/span>&lt;span style="color:#268bd2">&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">&amp;lt;/dubbo:reference&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">&amp;lt;dubbo:reference&lt;/span> registry=&lt;span style="color:#2aa198">&amp;#34;dubbogo&amp;#34;&lt;/span> check=&lt;span style="color:#2aa198">&amp;#34;false&amp;#34;&lt;/span> id=&lt;span style="color:#2aa198">&amp;#34;userProvider2&amp;#34;&lt;/span> protocol=&lt;span style="color:#2aa198">&amp;#34;dubbo&amp;#34;&lt;/span> version=&lt;span style="color:#2aa198">&amp;#34;2.0&amp;#34;&lt;/span> group=&lt;span style="color:#2aa198">&amp;#34;as&amp;#34;&lt;/span> interface=&lt;span style="color:#2aa198">&amp;#34;org.apache.dubbo.UserProvider&amp;#34;&lt;/span>&lt;span style="color:#268bd2">&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">&amp;lt;/dubbo:reference&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">&amp;lt;/beans&amp;gt;&lt;/span>
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;/li>
&lt;li>
&lt;p>发起调用&lt;/p>
&lt;/li>
&lt;/ol>
&lt;div class="highlight">&lt;pre tabindex="0" style="color:#93a1a1;background-color:#002b36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-java" data-lang="java">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">public&lt;/span> &lt;span style="color:#268bd2">class&lt;/span> &lt;span style="color:#268bd2">Consumer&lt;/span> &lt;span style="color:#719e07">{&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75">// Define a private variable (Required in Spring)
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span> &lt;span style="color:#268bd2">private&lt;/span> &lt;span style="color:#268bd2">static&lt;/span> UserProvider userProvider&lt;span style="color:#719e07">;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">public&lt;/span> &lt;span style="color:#268bd2">static&lt;/span> &lt;span style="color:#dc322f">void&lt;/span> &lt;span style="color:#268bd2">main&lt;/span>&lt;span style="color:#719e07">(&lt;/span>String&lt;span style="color:#719e07">[]&lt;/span> args&lt;span style="color:#719e07">)&lt;/span> &lt;span style="color:#268bd2">throws&lt;/span> Exception &lt;span style="color:#719e07">{&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> ClassPathXmlApplicationContext context &lt;span style="color:#719e07">=&lt;/span> &lt;span style="color:#719e07">new&lt;/span> ClassPathXmlApplicationContext&lt;span style="color:#719e07">(&lt;/span>&lt;span style="color:#719e07">new&lt;/span> String&lt;span style="color:#719e07">[]{&lt;/span>&lt;span style="color:#2aa198">&amp;#34;META-INF/spring/dubbo.consumer.xml&amp;#34;&lt;/span>&lt;span style="color:#719e07">});&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> userProvider &lt;span style="color:#719e07">=&lt;/span> &lt;span style="color:#719e07">(&lt;/span>UserProvider&lt;span style="color:#719e07">)&lt;/span>context&lt;span style="color:#719e07">.&lt;/span>getBean&lt;span style="color:#719e07">(&lt;/span>&lt;span style="color:#2aa198">&amp;#34;userProvider&amp;#34;&lt;/span>&lt;span style="color:#719e07">);&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> testGetUser&lt;span style="color:#719e07">();&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">}&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">private&lt;/span> &lt;span style="color:#268bd2">static&lt;/span> &lt;span style="color:#dc322f">void&lt;/span> &lt;span style="color:#268bd2">testGetUser&lt;/span>&lt;span style="color:#719e07">()&lt;/span> &lt;span style="color:#268bd2">throws&lt;/span> Exception &lt;span style="color:#719e07">{&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> User user &lt;span style="color:#719e07">=&lt;/span> userProvider&lt;span style="color:#719e07">.&lt;/span>getUser&lt;span style="color:#719e07">(&lt;/span>1&lt;span style="color:#719e07">);&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> System&lt;span style="color:#719e07">.&lt;/span>out&lt;span style="color:#719e07">.&lt;/span>println&lt;span style="color:#719e07">(&lt;/span>user&lt;span style="color:#719e07">.&lt;/span>getId&lt;span style="color:#719e07">());&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#719e07">}&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">}&lt;/span>
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div></description></item><item><title>Overview: 与 gRPC 应用互通</title><link>https://dubbo.apache.org/zh-cn/overview/mannual/golang-sdk/tutorial/develop/interflow/call_grpc/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/zh-cn/overview/mannual/golang-sdk/tutorial/develop/interflow/call_grpc/</guid><description>
&lt;h2 id="1-准备工作">1. 准备工作&lt;/h2>
&lt;ul>
&lt;li>dubbo-go cli 工具和依赖工具已安装&lt;/li>
&lt;li>创建一个新的 demo 应用&lt;/li>
&lt;/ul>
&lt;h2 id="2-dubbo-go-应用与-grpc-应用互通">2. Dubbo-go 应用与 gRPC 应用互通&lt;/h2>
&lt;p>参考 &lt;a href="https://github.com/apache/dubbo-go-samples/tree/master/rpc/triple/pb/dubbogo-grpc">dubbo-go-samples/rpc/triple/pb/dubbogo-grpc&lt;/a>&lt;/p></description></item></channel></rss>