en/docs3-v2/golang-sdk/tutorial/develop/interflow/index.xml

<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Apache Dubbo – Heterogeneous System Interoperability</title><link>https://dubbo.apache.org/en/docs3-v2/golang-sdk/tutorial/develop/interflow/</link><description>Recent content in Heterogeneous System Interoperability on Apache Dubbo</description><generator>Hugo -- gohugo.io</generator><language>en</language><atom:link href="https://dubbo.apache.org/en/docs3-v2/golang-sdk/tutorial/develop/interflow/index.xml" rel="self" type="application/rss+xml"/><item><title>Docs3-V2: Cross-language interoperability with Java applications</title><link>https://dubbo.apache.org/en/docs3-v2/golang-sdk/tutorial/develop/interflow/call_java/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/golang-sdk/tutorial/develop/interflow/call_java/</guid><description>
&lt;h2 id="preparation">Preparation&lt;/h2>
&lt;h3 id="environment">environment&lt;/h3>
&lt;p>JDK 8, Golang &amp;gt;= 1.15, Dubbo 3.0.2, zookeeper enabled,&lt;/p>
&lt;h3 id="go-java-interoperability-prerequisites">Go-Java Interoperability Prerequisites&lt;/h3>
&lt;ul>
&lt;li>
&lt;p>The transfer structure defined by Go/Java is consistent&lt;/p>
&lt;ul>
&lt;li>PB serialization&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 serialization&lt;/li>
&lt;/ul>
&lt;p>POJO for Go, please refer to &lt;a href="https://www.yuque.com/docs/share/c698bd6e-e4d6-47db-bc1c-c757cc9b4f3e?">Dubbogo Hessian serialization support document&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>POJOs 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 requires the same method signature as Go&lt;/p>
&lt;p>E.g:&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 (automatically generated by protoc-gen-go-triple based on proto files)&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 (defined by the developer)&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 methods need to comply with &lt;a href="https://www.yuque.com/docs/share/eff9c51f-a7f4-47d6-87ff-11a2152bdffe?">Dubbogo 3.0 User Service Interface Definition Specification&lt;/a>&lt;/p>
&lt;/li>
&lt;li>
&lt;p>Java&amp;rsquo;s triplet is consistent with the interface configured by Go service/reference&lt;/p>
&lt;p>The triplet is configured at the interface level: interface, group, version. **It should be noted that the concept of group and version is the group and vesion of the dubbo interface, which are configured in the properties file of spring cloud when starting the dubbo-java service, not the version that mvn depends on in pom.xml. ** group and version are empty by default, in the dubbo-go framework, you can specify group and version in the corresponding position of service/reference.&lt;/p>
&lt;p>E.g:&lt;/p>
&lt;p>Java interface full name: com.apache.dubbo.sample.basic.IGreeter, interface version is v1.0.1, group is&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"># need to correspond to the server, the default is empty&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"># needs to correspond to the server, the default is empty&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"># need to correspond to the server, the default is empty&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"># needs to correspond to the server, the default is empty&lt;/span>
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;/li>
&lt;/ul>
&lt;h2 id="1-intercommunication-based-on-triple-protocol-pb-serialization">1. Intercommunication based on Triple protocol (PB serialization)&lt;/h2>
&lt;p>Reference &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-start">Java-Server start&lt;/h4>
&lt;ol>
&lt;li>Define Java PB file, please refer to &lt;a href="https://dubbo.apache.org/zh-cn/docs/quick-start/">Dubbo Quick Start&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>The interface description file defines the generated Java class org.apache.dubbo.sample.hello.Helloworld, and the transmission structure HelloRequest and User class included in the class.&lt;/p>
&lt;ol start="2">
&lt;li>
&lt;p>Define the service interface:&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">// Import the class generated according to PB
&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">// define the interface
&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>Implement the service interface:&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> &lt;span style="color:#268bd2">newBuilder&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>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>Use the Dubbo3 framework to start the service&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">// Use the Triple protocol
&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">// Use ZK as the registration center
&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> &lt;span style="color:#268bd2">export&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;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>Start the service, you can see the following log output, which means that the Java Triple Server started successfully&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-start">Go-Client start&lt;/h4>
&lt;p>For the Dubbo service that has been started, if you need to develop its corresponding Go-client, you need to perform the following steps:&lt;/p>
&lt;ol>
&lt;li>
&lt;p>Write a proto file adapted to Java&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 name is optional
&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>Use protoc-gen-triple to generate interface files&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>Write configuration file: 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>Write the main.go file and initiate the call&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">// Import the generated interface structure
&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>You can view the log of the successful call&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;p>-java-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-fallback" data-lang="fallback">&lt;span style="display:flex;">&lt;span>receiver: 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-start">Go-Server start&lt;/h4>
&lt;ol>
&lt;li>Define the configuration file&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>Introduce the transport structure and define the service&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>Start the service&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-start">Java-Client start&lt;/h4>
&lt;ol>
&lt;li>
&lt;p>Proto file writing and interface generation refer to the introduction of the above java-server&lt;/p>
&lt;/li>
&lt;li>
&lt;p>Start 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> &lt;span style="color:#268bd2">setInterface&lt;/span>&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> &lt;span style="color:#268bd2">setCheck&lt;/span>&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> &lt;span style="color:#268bd2">setLazy&lt;/span>&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> &lt;span style="color:#268bd2">setTimeout&lt;/span>&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> &lt;span style="color:#268bd2">setApplication&lt;/span>&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> &lt;span style="color:#268bd2">get&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> 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> &lt;span style="color:#268bd2">sayHello&lt;/span>&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> &lt;span style="color:#268bd2">sleep&lt;/span>&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> &lt;span style="color:#268bd2">printStackTrace&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;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-intercommunication-based-on-dubbo-protocol-hessian2-serialization">2. Intercommunication based on Dubbo protocol (Hessian2 serialization)&lt;/h2>
&lt;p>Reference &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-start-1">Java-Server start&lt;/h4>
&lt;ol>
&lt;li>Define the Java interface, parameters and return values, please refer to &lt;a href="https://dubbo.apache.org/zh-cn/docs/quick-start/">Dubbo Quick Start&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">// The service interface that needs to be exposed
&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>Implement the service interface:&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> &lt;span style="color:#268bd2">valueOf&lt;/span>&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>Start with SpringBoot&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> &lt;span style="color:#268bd2">start&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 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>Configure Dubbo parameters through Spring&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;!-- application name --&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;!-- which local registry to connect to --&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;!-- Use dubbo protocol to expose services on port 20880 --&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;!-- Declare the service interface that needs to be exposed --&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>Start the Provider class, and you can see the following log output, which means that the Dubbo Server has started successfully&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] Dubbo Bootstrap 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] Dubbo Bootstrap 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-start-1">Go-Client start&lt;/h4>
&lt;p>For the Dubbo service that has been started, if you need to develop its corresponding Go-client, you need to perform the following steps:&lt;/p>
&lt;ol>
&lt;li>Write the POJO class User adapted to Java&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">// The field needs to correspond to the Java side, with the first letter capitalized
&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">// needs to correspond to the User class name on the Java side
&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">// register 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>Write a client stub class that is consistent with the Java side, and its interface method needs to correspond to the Java side&lt;/p>
&lt;p>It is stipulated that the first parameter must be context.Context, and the last return value must be 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 client stub class
&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">// The dubbo label is used to adapt the uppercase method name of the go side client -&amp;gt; the lowercase method name of the java side, only the dubbo protocol client needs to use it
&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">// Register the client stub class to the framework, and instantiate the client interface pointer 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>Write configuration file: 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"># Define the registration center 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"># stub class name&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 protocol, default hessian2 serialization method&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"># The interface needs to correspond to the Java side&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"># log level&lt;/span>
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>Or use Triple + Hessian2 to serialize the request Server. If this example communicates with Java Server, Triple cannot be used.&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 protocol&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"># serialization method hessian2, triple protocol defaults to pb serialization, if not configured, an error will be reported&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>Write the main.go file and initiate the call&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>You can view the log of the successful call, which meets expectations&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-start-1">Go-Server start&lt;/h4>
&lt;ol>
&lt;li>Define the configuration file&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>Introduce transport structure, define service and method name mapping&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 defines method name mapping, from Go method name to Java lowercase method name, only dubbo protocol service interface needs to use
&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>Start the service&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-start-1">Java-Client start&lt;/h4>
&lt;ol>
&lt;li>
&lt;p>Java client Spring configuration&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;!-- Consumer application name, used to calculate dependencies, not a matching condition, do not be the same as the provider --&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;!-- which local registry to connect to --&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;!-- Use dubbo protocol to expose services on port 20880 --&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;!-- Declare the service interface that needs to be used --&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>Initiate the call&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> &lt;span style="color:#268bd2">getBean&lt;/span>&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> &lt;span style="color:#268bd2">getUser&lt;/span>&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>Docs3-V2: Interoperate with gRPC applications</title><link>https://dubbo.apache.org/en/docs3-v2/golang-sdk/tutorial/develop/interflow/call_grpc/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/golang-sdk/tutorial/develop/interflow/call_grpc/</guid><description>
&lt;h2 id="1-preparations">1. Preparations&lt;/h2>
&lt;ul>
&lt;li>dubbo-go cli tools and dependent tools have been installed&lt;/li>
&lt;li>Create a new demo application&lt;/li>
&lt;/ul>
&lt;h2 id="2-interoperability-between-dubbo-go-application-and-grpc-application">2. Interoperability between Dubbo-go application and gRPC application&lt;/h2>
&lt;p>Reference &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>