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<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Apache Dubbo – 高级特性</title><link>https://dubbo.apache.org/zh-cn/overview/mannual/golang-sdk/tutorial/develop/features/</link><description>Recent content in 高级特性 on Apache Dubbo</description><generator>Hugo -- gohugo.io</generator><language>zh-cn</language><atom:link href="https://dubbo.apache.org/zh-cn/overview/mannual/golang-sdk/tutorial/develop/features/index.xml" rel="self" type="application/rss+xml"/><item><title>Overview: 使用配置 API 启动应用</title><link>https://dubbo.apache.org/zh-cn/overview/mannual/golang-sdk/tutorial/develop/features/config_api/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/zh-cn/overview/mannual/golang-sdk/tutorial/develop/features/config_api/</guid><description>
&lt;h2 id="1-准备工作">1. 准备工作&lt;/h2>
&lt;ul>
&lt;li>dubbo-go cli 工具和依赖工具已安装&lt;/li>
&lt;li>创建一个新的 demo 应用&lt;/li>
&lt;/ul>
&lt;h2 id="2-使用配置-api-启动应用">2. 使用配置 API 启动应用&lt;/h2>
&lt;p>用户无需使用配置文件，可直接在代码中以 API 的调用的形式写入配置&lt;/p>
&lt;h3 id="21-修改服务端代码">2.1 修改服务端代码：&lt;/h3>
&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">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>&lt;/span>&lt;span style="display:flex;">&lt;span> protocolConfig &lt;span style="color:#719e07">:=&lt;/span> config.&lt;span style="color:#268bd2">NewProtocolConfigBuilder&lt;/span>().
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">SetPort&lt;/span>(&lt;span style="color:#2aa198">&amp;#34;20000&amp;#34;&lt;/span>).
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">SetName&lt;/span>(&lt;span style="color:#2aa198">&amp;#34;tri&amp;#34;&lt;/span>).
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">Build&lt;/span>()
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> serviceConfig &lt;span style="color:#719e07">:=&lt;/span> config.&lt;span style="color:#268bd2">NewServiceConfigBuilder&lt;/span>().
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">SetInterface&lt;/span>(&lt;span style="color:#2aa198">&amp;#34;&amp;#34;&lt;/span>). &lt;span style="color:#586e75">// read interface from 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:#268bd2">Build&lt;/span>()
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> providerConfig &lt;span style="color:#719e07">:=&lt;/span> config.&lt;span style="color:#268bd2">NewProviderConfigBuilder&lt;/span>().
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">AddService&lt;/span>(&lt;span style="color:#2aa198">&amp;#34;GreeterProvider&amp;#34;&lt;/span>, serviceConfig).
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">Build&lt;/span>()
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> rootConfig &lt;span style="color:#719e07">:=&lt;/span> config.&lt;span style="color:#268bd2">NewRootConfigBuilder&lt;/span>().
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">AddProtocol&lt;/span>(&lt;span style="color:#2aa198">&amp;#34;triple-protocol-id&amp;#34;&lt;/span>, protocolConfig). &lt;span style="color:#586e75">// add protocol, key is custom
&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">SetProvider&lt;/span>(providerConfig).&lt;span style="color:#268bd2">Build&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">if&lt;/span> err &lt;span style="color:#719e07">:=&lt;/span> config.&lt;span style="color:#268bd2">Load&lt;/span>(config.&lt;span style="color:#268bd2">WithRootConfig&lt;/span>(rootConfig)); 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;p>配置 API 看上去写法较为复杂，但单个配置结构的构造过程都是一致的，参考 Java Builder 的设计，我们在配置 API 模块选用 &lt;code>New().SetA().SetB().Build()&lt;/code>的方式来逐层构造单个配置结构。&lt;/p>
&lt;p>完成后，可删除掉go-server/conf 文件夹。&lt;/p>
&lt;h3 id="22-修改客户端代码">2.2 修改客户端代码：&lt;/h3>
&lt;p>go-client/cmd/client.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-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">SetConsumerService&lt;/span>(grpcGreeterImpl)
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> referenceConfig &lt;span style="color:#719e07">:=&lt;/span> config.&lt;span style="color:#268bd2">NewReferenceConfigBuilder&lt;/span>().
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">SetProtocol&lt;/span>(&lt;span style="color:#2aa198">&amp;#34;tri&amp;#34;&lt;/span>).
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">SetURL&lt;/span>(&lt;span style="color:#2aa198">&amp;#34;tri://localhost:20000&amp;#34;&lt;/span>).
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">SetInterface&lt;/span>(&lt;span style="color:#2aa198">&amp;#34;&amp;#34;&lt;/span>). &lt;span style="color:#586e75">// read interface name from 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:#268bd2">Build&lt;/span>()
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> consumerConfig &lt;span style="color:#719e07">:=&lt;/span> config.&lt;span style="color:#268bd2">NewConsumerConfigBuilder&lt;/span>().
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">AddReference&lt;/span>(&lt;span style="color:#2aa198">&amp;#34;GreeterClientImpl&amp;#34;&lt;/span>, referenceConfig).
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">Build&lt;/span>()
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> rootConfig &lt;span style="color:#719e07">:=&lt;/span> config.&lt;span style="color:#268bd2">NewRootConfigBuilder&lt;/span>().
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">SetConsumer&lt;/span>(consumerConfig).&lt;span style="color:#268bd2">Build&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>(config.&lt;span style="color:#268bd2">WithRootConfig&lt;/span>(rootConfig)); 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>&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;p>完成后，可删除掉go-client/conf 文件夹。&lt;/p>
&lt;h3 id="23-验证-config-api">2.3 验证 Config API&lt;/h3>
&lt;p>分别启动 server 和 client ，查看调用信息。&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>INFO cmd/client.go:62 client response result: name:&amp;#34;Hello laurence&amp;#34; id:&amp;#34;12345&amp;#34; age:21
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div></description></item><item><title>Overview: 日志</title><link>https://dubbo.apache.org/zh-cn/overview/mannual/golang-sdk/tutorial/develop/features/custom-logger/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/zh-cn/overview/mannual/golang-sdk/tutorial/develop/features/custom-logger/</guid><description>
&lt;p>参考samples &lt;a href="https://github.com/apache/dubbo-go-samples/tree/master/logger">dubbo-go-samples/logger&lt;/a>&lt;/p>
&lt;h2 id="1-日志配置">1. 日志配置&lt;/h2>
&lt;p>dubbogo 3.0 默认采用 zap 日志库，在配置文件中不添加 logger 配置，日志将会打印到控制默认级别为debug。您也可在配置文件中配置日志级别、, 可参照如下方式来配置zap-config和lumberjack-config，从而定制化日志输出。&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">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>: debug &lt;span style="color:#586e75"># 日志级别&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">development&lt;/span>: &lt;span style="color:#cb4b16">false&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">disableCaller&lt;/span>: &lt;span style="color:#cb4b16">false&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">disableStacktrace&lt;/span>: &lt;span style="color:#cb4b16">false&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">encoding&lt;/span>: &lt;span style="color:#2aa198">&amp;#34;console&amp;#34;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75"># zap encoder 配置&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">encoderConfig&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">messageKey&lt;/span>: &lt;span style="color:#2aa198">&amp;#34;message&amp;#34;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">levelKey&lt;/span>: &lt;span style="color:#2aa198">&amp;#34;level&amp;#34;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">timeKey&lt;/span>: &lt;span style="color:#2aa198">&amp;#34;time&amp;#34;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">nameKey&lt;/span>: &lt;span style="color:#2aa198">&amp;#34;logger&amp;#34;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">callerKey&lt;/span>: &lt;span style="color:#2aa198">&amp;#34;caller&amp;#34;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">stacktraceKey&lt;/span>: &lt;span style="color:#2aa198">&amp;#34;stacktrace&amp;#34;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">lineEnding&lt;/span>: &lt;span style="color:#2aa198">&amp;#34;&amp;#34;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">levelEncoder&lt;/span>: &lt;span style="color:#2aa198">&amp;#34;capitalColor&amp;#34;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">timeEncoder&lt;/span>: &lt;span style="color:#2aa198">&amp;#34;iso8601&amp;#34;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">durationEncoder&lt;/span>: &lt;span style="color:#2aa198">&amp;#34;seconds&amp;#34;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">callerEncoder&lt;/span>: &lt;span style="color:#2aa198">&amp;#34;short&amp;#34;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">nameEncoder&lt;/span>: &lt;span style="color:#2aa198">&amp;#34;&amp;#34;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">outputPaths&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> - &lt;span style="color:#2aa198">&amp;#34;stderr&amp;#34;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">errorOutputPaths&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> - &lt;span style="color:#2aa198">&amp;#34;stderr&amp;#34;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">lumberjack-config&lt;/span>:
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75"># 写日志的文件名称&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">filename&lt;/span>: &lt;span style="color:#2aa198">&amp;#34;logs.log&amp;#34;&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75"># 每个日志文件长度的最大大小，单位是 MiB。默认 100MiB&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">maxSize&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:#586e75"># 日志保留的最大天数(只保留最近多少天的日志)&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">maxAge&lt;/span>: &lt;span style="color:#2aa198">3&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75"># 只保留最近多少个日志文件，用于控制程序总日志的大小&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">maxBackups&lt;/span>: &lt;span style="color:#2aa198">5&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75"># 是否使用本地时间，默认使用 UTC 时间&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">localTime&lt;/span>: &lt;span style="color:#cb4b16">true&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#586e75"># 是否压缩日志文件，压缩方法 gzip&lt;/span>
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">compress&lt;/span>: &lt;span style="color:#cb4b16">false&lt;/span>
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="2-日志api-和-自定义日志">2. 日志API 和 自定义日志&lt;/h2>
&lt;p>日志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-go" data-lang="go">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#268bd2">type&lt;/span> Logger &lt;span style="color:#268bd2">interface&lt;/span> {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">Info&lt;/span>(args &lt;span style="color:#719e07">...&lt;/span>&lt;span style="color:#268bd2">interface&lt;/span>{})
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">Warn&lt;/span>(args &lt;span style="color:#719e07">...&lt;/span>&lt;span style="color:#268bd2">interface&lt;/span>{})
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">Error&lt;/span>(args &lt;span style="color:#719e07">...&lt;/span>&lt;span style="color:#268bd2">interface&lt;/span>{})
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">Debug&lt;/span>(args &lt;span style="color:#719e07">...&lt;/span>&lt;span style="color:#268bd2">interface&lt;/span>{})
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">Fatal&lt;/span>(args &lt;span style="color:#719e07">...&lt;/span>&lt;span style="color:#268bd2">interface&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">Infof&lt;/span>(fmt &lt;span style="color:#dc322f">string&lt;/span>, args &lt;span style="color:#719e07">...&lt;/span>&lt;span style="color:#268bd2">interface&lt;/span>{})
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">Warnf&lt;/span>(fmt &lt;span style="color:#dc322f">string&lt;/span>, args &lt;span style="color:#719e07">...&lt;/span>&lt;span style="color:#268bd2">interface&lt;/span>{})
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">Errorf&lt;/span>(fmt &lt;span style="color:#dc322f">string&lt;/span>, args &lt;span style="color:#719e07">...&lt;/span>&lt;span style="color:#268bd2">interface&lt;/span>{})
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">Debugf&lt;/span>(fmt &lt;span style="color:#dc322f">string&lt;/span>, args &lt;span style="color:#719e07">...&lt;/span>&lt;span style="color:#268bd2">interface&lt;/span>{})
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">Fatalf&lt;/span>(fmt &lt;span style="color:#dc322f">string&lt;/span>, args &lt;span style="color:#719e07">...&lt;/span>&lt;span style="color:#268bd2">interface&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>日志API&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:#719e07">import&lt;/span> &lt;span style="color:#2aa198">&amp;#34;dubbo.apache.org/dubbo-go/v3/common/logger&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>logger.&lt;span style="color:#268bd2">SetLoggerLevel&lt;/span>(warn) &lt;span style="color:#586e75">// 在 main 函数中设置日志级别
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>logger.&lt;span style="color:#268bd2">SetLogger&lt;/span>(myLogger) &lt;span style="color:#586e75">// 在 main 函数中设置自定义logger
&lt;/span>&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;ul>
&lt;li>日志API不可以在Init 阶段使用，否则可能会发生意料之外的问题。&lt;/li>
&lt;/ul></description></item><item><title>Overview: 使用 ctx 传递上下文信息</title><link>https://dubbo.apache.org/zh-cn/overview/mannual/golang-sdk/tutorial/develop/features/context/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/zh-cn/overview/mannual/golang-sdk/tutorial/develop/features/context/</guid><description>
&lt;h2 id="1-准备工作">1. 准备工作&lt;/h2>
&lt;ul>
&lt;li>dubbo-go cli 工具和依赖工具已安装&lt;/li>
&lt;li>创建一个新的 demo 应用&lt;/li>
&lt;/ul>
&lt;h2 id="2-使用-context-传递附加信息">2. 使用 context 传递附加信息&lt;/h2>
&lt;p>参考 &lt;a href="https://github.com/apache/dubbo-go-samples/tree/master/context">dubbo-go-samples/context&lt;/a>&lt;/p></description></item><item><title>Overview: 泛化调用</title><link>https://dubbo.apache.org/zh-cn/overview/mannual/golang-sdk/tutorial/develop/features/generic/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/zh-cn/overview/mannual/golang-sdk/tutorial/develop/features/generic/</guid><description>
&lt;h2 id="1-dubbo-go-泛化调用-java-server">1. Dubbo-go 泛化调用 Java Server&lt;/h2>
&lt;p>使用 Triple 协议 + hessian2 序列化方案&lt;/p>
&lt;h3 id="11-java-server启动">1.1 Java-Server启动&lt;/h3>
&lt;ol>
&lt;li>传输结构定义&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>&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> java.io.Serializable;
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">import&lt;/span> java.util.Date;
&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>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">private&lt;/span> String id;
&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>&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>&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>&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>接口定义&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>&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> java.util.ArrayList;
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">import&lt;/span> java.util.List;
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">import&lt;/span> java.util.Map;
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">//import org.apache.dubbo.rpc.filter.GenericFilter;&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">UserProvider&lt;/span> {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> User &lt;span style="color:#268bd2">GetUser1&lt;/span>(String userId);
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h3 id="12-go-client-泛化调用">1.2 Go-Client 泛化调用&lt;/h3>
&lt;p>此处展示以 API 的形式构造泛化接口引用&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:#586e75">// 初始化 Reference 配置
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>refConf &lt;span style="color:#719e07">:=&lt;/span> config.&lt;span style="color:#268bd2">NewReferenceConfigBuilder&lt;/span>().
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">SetInterface&lt;/span>(&lt;span style="color:#2aa198">&amp;#34;org.apache.dubbo.UserProvider&amp;#34;&lt;/span>).
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">SetRegistryIDs&lt;/span>(&lt;span style="color:#2aa198">&amp;#34;zk&amp;#34;&lt;/span>).
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">SetProtocol&lt;/span>(tripleConst.TRIPLE).
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">SetGeneric&lt;/span>(&lt;span style="color:#cb4b16">true&lt;/span>).
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">SetSerialization&lt;/span>(&lt;span style="color:#2aa198">&amp;#34;hessian2&amp;#34;&lt;/span>).
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">Build&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">// 构造 Root 配置，引入注册中心模块
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>rootConfig &lt;span style="color:#719e07">:=&lt;/span> config.&lt;span style="color:#268bd2">NewRootConfigBuilder&lt;/span>().
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">AddRegistry&lt;/span>(&lt;span style="color:#2aa198">&amp;#34;zk&amp;#34;&lt;/span>, config.&lt;span style="color:#268bd2">NewRegistryConfigWithProtocolDefaultPort&lt;/span>(&lt;span style="color:#2aa198">&amp;#34;zookeeper&amp;#34;&lt;/span>)).
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">Build&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">// Reference 配置初始化，因为需要使用注册中心进行服务发现，需要传入经过配置的 rootConfig
&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">if&lt;/span> err &lt;span style="color:#719e07">:=&lt;/span> refConf.&lt;span style="color:#268bd2">Init&lt;/span>(rootConfig); 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>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// 泛化调用加载、服务发现
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>refConf.&lt;span style="color:#268bd2">GenericLoad&lt;/span>(appName)
&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>(time.Second)
&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">// 发起泛化调用
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>resp, err &lt;span style="color:#719e07">:=&lt;/span> refConf.&lt;span style="color:#268bd2">GetRPCService&lt;/span>().(&lt;span style="color:#719e07">*&lt;/span>generic.GenericService).&lt;span style="color:#268bd2">Invoke&lt;/span>(
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> context.&lt;span style="color:#268bd2">TODO&lt;/span>(),
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#2aa198">&amp;#34;getUser1&amp;#34;&lt;/span>,
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> []&lt;span style="color:#dc322f">string&lt;/span>{&lt;span style="color:#2aa198">&amp;#34;java.lang.String&amp;#34;&lt;/span>},
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> []hessian.Object{&lt;span style="color:#2aa198">&amp;#34;A003&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:#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;GetUser1(userId string) res: %+v&amp;#34;&lt;/span>, resp)
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>GenericService 的 Invoke 方法包括三个参数：context.Context, []string, []hessian.Object,&lt;/p>
&lt;p>其中第二个参数为对应参数的 Java 类名，例如java.lang.String、org.apache.dubbo.User，第三个参数为参数列表，hessian.Object 即为 interface。第二、第三个参数应与方法签名一致，按顺序对应。&lt;/p>
&lt;p>获得map结构的返回结果&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>INFO cmd/client.go:89 GetUser1(userId string) res: map[age:48 class:org.apache.dubbo.User id:A003 name:Joe sex:MAN time:2021-10-04 14:03:03.37 +0800 CST]
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div></description></item><item><title>Overview: 泛化调用</title><link>https://dubbo.apache.org/zh-cn/overview/mannual/golang-sdk/tutorial/develop/features/generic-2/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/zh-cn/overview/mannual/golang-sdk/tutorial/develop/features/generic-2/</guid><description>
&lt;h2 id="1-dubbogo-泛化调用-java-server">1. Dubbogo 泛化调用 Java Server&lt;/h2>
&lt;p>使用 Triple 协议 + hessian2 序列化方案&lt;/p>
&lt;p>可参考Dubbogo 3.0 &lt;a href="https://www.yuque.com/docs/share/f4e72670-74ab-45b9-bc0c-4b42249ed953?#">泛化调用文档&lt;/a>&lt;/p>
&lt;h3 id="11-java-server启动">1.1 Java-Server启动&lt;/h3>
&lt;ol>
&lt;li>传输结构定义&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>&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> java.io.Serializable;
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">import&lt;/span> java.util.Date;
&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>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">private&lt;/span> String id;
&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>&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>&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>&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>接口定义&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>&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> java.util.ArrayList;
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">import&lt;/span> java.util.List;
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#719e07">import&lt;/span> java.util.Map;
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">//import org.apache.dubbo.rpc.filter.GenericFilter;&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">UserProvider&lt;/span> {
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> User &lt;span style="color:#268bd2">GetUser1&lt;/span>(String userId);
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>}
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h3 id="12-go-client-泛化调用">1.2 Go-Client 泛化调用&lt;/h3>
&lt;p>此处展示以 API 的形式构造泛化接口引用&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:#586e75">// 初始化 Reference 配置
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>refConf &lt;span style="color:#719e07">:=&lt;/span> config.&lt;span style="color:#268bd2">NewReferenceConfigBuilder&lt;/span>().
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">SetInterface&lt;/span>(&lt;span style="color:#2aa198">&amp;#34;org.apache.dubbo.UserProvider&amp;#34;&lt;/span>).
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">SetRegistryIDs&lt;/span>(&lt;span style="color:#2aa198">&amp;#34;zk&amp;#34;&lt;/span>).
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">SetProtocol&lt;/span>(tripleConst.TRIPLE).
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">SetGeneric&lt;/span>(&lt;span style="color:#cb4b16">true&lt;/span>).
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">SetSerialization&lt;/span>(&lt;span style="color:#2aa198">&amp;#34;hessian2&amp;#34;&lt;/span>).
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">Build&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">// 构造 Root 配置，引入注册中心模块
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>rootConfig &lt;span style="color:#719e07">:=&lt;/span> config.&lt;span style="color:#268bd2">NewRootConfigBuilder&lt;/span>().
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">AddRegistry&lt;/span>(&lt;span style="color:#2aa198">&amp;#34;zk&amp;#34;&lt;/span>, config.&lt;span style="color:#268bd2">NewRegistryConfigWithProtocolDefaultPort&lt;/span>(&lt;span style="color:#2aa198">&amp;#34;zookeeper&amp;#34;&lt;/span>)).
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#268bd2">Build&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">// Reference 配置初始化，因为需要使用注册中心进行服务发现，需要传入经过配置的 rootConfig
&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">if&lt;/span> err &lt;span style="color:#719e07">:=&lt;/span> refConf.&lt;span style="color:#268bd2">Init&lt;/span>(rootConfig); 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>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">// 泛化调用加载、服务发现
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>refConf.&lt;span style="color:#268bd2">GenericLoad&lt;/span>(appName)
&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>(time.Second)
&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">// 发起泛化调用
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#586e75">&lt;/span>resp, err &lt;span style="color:#719e07">:=&lt;/span> refConf.&lt;span style="color:#268bd2">GetRPCService&lt;/span>().(&lt;span style="color:#719e07">*&lt;/span>generic.GenericService).&lt;span style="color:#268bd2">Invoke&lt;/span>(
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> context.&lt;span style="color:#268bd2">TODO&lt;/span>(),
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> &lt;span style="color:#2aa198">&amp;#34;getUser1&amp;#34;&lt;/span>,
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> []&lt;span style="color:#dc322f">string&lt;/span>{&lt;span style="color:#2aa198">&amp;#34;java.lang.String&amp;#34;&lt;/span>},
&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span> []hessian.Object{&lt;span style="color:#2aa198">&amp;#34;A003&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:#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;GetUser1(userId string) res: %+v&amp;#34;&lt;/span>, resp)
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>GenericService 的 Invoke 方法包括三个参数：context.Context, []string, []hessian.Object,&lt;/p>
&lt;p>其中第二个参数为对应参数的 Java 类名，例如java.lang.String、org.apache.dubbo.User，第三个参数为参数列表，hessian.Object 即为 interface。第二、第三个参数应与方法签名一致，按顺序对应。&lt;/p>
&lt;p>获得map结构的返回结果&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>INFO cmd/client.go:89 GetUser1(userId string) res: map[age:48 class:org.apache.dubbo.User id:A003 name:Joe sex:MAN time:2021-10-04 14:03:03.37 +0800 CST]
&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div></description></item></channel></rss>