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menu__caret"></button></div><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-2 menu__list-item menu__list-item--collapsed"><div class=menu__list-item-collapsible><a class="categoryLink_byQd menu__link menu__link--sublist" tabindex=0 href=/docs/guide/scala/><span title=Scala class=categoryLinkLabel_W154>Scala</span></a><button aria-label="Expand sidebar category 'Scala'" aria-expanded=false type=button class="clean-btn menu__caret"></button></div><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-2 menu__list-item menu__list-item--collapsed"><div class=menu__list-item-collapsible><a class="categoryLink_byQd menu__link menu__link--sublist" tabindex=0 href=/docs/guide/kotlin/><span title=Kotlin class=categoryLinkLabel_W154>Kotlin</span></a><button aria-label="Expand sidebar category 'Kotlin'" aria-expanded=false type=button class="clean-btn menu__caret"></button></div><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-2 menu__list-item menu__list-item--collapsed"><div class=menu__list-item-collapsible><a class="categoryLink_byQd menu__link menu__link--sublist" tabindex=0 href=/docs/guide/xlang/><span title="Cross Language" class=categoryLinkLabel_W154>Cross Language</span></a><button aria-label="Expand sidebar category 'Cross Language'" aria-expanded=false type=button class="clean-btn menu__caret"></button></div></ul></ul></nav></div></div></aside><main class=docMainContainer_TBSr><div class="container padding-top--md padding-bottom--lg"><div class=row><div class="col docItemCol_VOVn"><div class=docItemContainer_Djhp><article><nav class="theme-doc-breadcrumbs breadcrumbsContainer_Z_bl" aria-label=Breadcrumbs><ul class=breadcrumbs><li class=breadcrumbs__item><a aria-label="Home page" class=breadcrumbs__link href=/><svg viewBox="0 0 24 24" class=breadcrumbHomeIcon_YNFT><path d="M10 19v-5h4v5c0 .55.45 1 1 1h3c.55 0 1-.45 1-1v-7h1.7c.46 0 .68-.57.33-.87L12.67 3.6c-.38-.34-.96-.34-1.34 0l-8.36 7.53c-.34.3-.13.87.33.87H5v7c0 .55.45 1 1 1h3c.55 0 1-.45 1-1z" fill=currentColor /></svg></a><li class=breadcrumbs__item><span class=breadcrumbs__link>Guide</span><li class=breadcrumbs__item><a class=breadcrumbs__link href=/docs/guide/go/><span>Go</span></a><li class="breadcrumbs__item breadcrumbs__item--active"><span class=breadcrumbs__link>gRPC Support</span></ul></nav><span class="theme-doc-version-badge badge badge--secondary">Version: 1.3.0</span><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type=button class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><header><h1>gRPC Support</h1></header><p>Fory can generate Go gRPC service companions for schemas that define services. |
| The generated code uses grpc-go for transport and a Fory-backed <code>CodecV2</code> for |
| request and response payloads.</p> |
| <p>Use this mode when every RPC peer is generated from the same Fory IDL, protobuf |
| IDL, or FlatBuffers IDL and you want gRPC transport semantics with Fory payload |
| encoding. Use standard protobuf gRPC code generation when clients or tools must |
| consume protobuf message bytes directly.</p> |
| <h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=add-dependencies>Add Dependencies<a href=#add-dependencies class=hash-link aria-label="Direct link to Add Dependencies" title="Direct link to Add Dependencies" translate=no></a></h2> |
| <p>Add grpc-go to your module. Fory Go packages do not add gRPC as a hard |
| dependency.</p> |
| <div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-bash codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token plain">go get google.golang.org/grpc</span><br/></div></code></pre></div></div> |
| <p>Your generated code also imports the Fory Go module:</p> |
| <div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-bash codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token plain">go get github.com/apache/fory/go/fory</span><br/></div></code></pre></div></div> |
| <h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=define-a-service>Define a Service<a href=#define-a-service class=hash-link aria-label="Direct link to Define a Service" title="Direct link to Define a Service" translate=no></a></h2> |
| <p>Service definitions can come from Fory IDL, protobuf IDL, or FlatBuffers |
| <code>rpc_service</code> definitions. A Fory IDL service looks like this:</p> |
| <div class="language-protobuf codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-protobuf codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token keyword" style=color:#00009f>package</span><span class="token plain"> demo</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">greeter</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>message</span><span class="token plain"> </span><span class="token class-name">HelloRequest</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token builtin">string</span><span class="token plain"> name </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token number" style=color:#36acaa>1</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>message</span><span class="token plain"> </span><span class="token class-name">HelloReply</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token builtin">string</span><span class="token plain"> reply </span><span class="token operator" style=color:#393A34>=</span><span class="token plain"> </span><span class="token number" style=color:#36acaa>1</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>service</span><span class="token plain"> </span><span class="token class-name">Greeter</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>rpc</span><span class="token plain"> </span><span class="token function" style=color:#d73a49>SayHello</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>(</span><span class="token class-name">HelloRequest</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>returns</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>(</span><span class="token class-name">HelloReply</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><br/></div></code></pre></div></div> |
| <p>Generate Go model and gRPC companion code with <code>--grpc</code>:</p> |
| <div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-bash codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token plain">foryc service.fdl </span><span class="token parameter variable" style=color:#36acaa>--go_out</span><span class="token operator" style=color:#393A34>=</span><span class="token plain">./generated/go </span><span class="token parameter variable" style=color:#36acaa>--grpc</span><br/></div></code></pre></div></div> |
| <p>For this schema, the Go generator emits:</p> |
| <table><thead><tr><th>File<th>Purpose<tbody><tr><td><code>greeter/demo_greeter.go</code><td>Fory model types and registration helpers<tr><td><code>greeter/demo_greeter_grpc.go</code><td>grpc-go client, server interfaces, and codec</table> |
| <p>Generated Go methods use exported PascalCase names such as <code>SayHello</code>. The |
| underlying gRPC method path keeps the exact schema method name, so names such as |
| <code>sayHello</code> or <code>say_hello</code> continue to route by their schema spelling.</p> |
| <h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=implement-a-server>Implement a Server<a href=#implement-a-server class=hash-link aria-label="Direct link to Implement a Server" title="Direct link to Implement a Server" translate=no></a></h2> |
| <p>Implement the generated <code>GreeterServer</code> interface, create a grpc-go server with |
| the generated Fory codec, and register the service.</p> |
| <div class="language-go codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-go codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token keyword" style=color:#00009f>package</span><span class="token plain"> main</span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>import</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token string" style=color:#e3116c>"context"</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token string" style=color:#e3116c>"log"</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token string" style=color:#e3116c>"net"</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token string" style=color:#e3116c>"google.golang.org/grpc"</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token string" style=color:#e3116c>"example.com/app/generated/go/greeter"</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>type</span><span class="token plain"> greeterService </span><span class="token keyword" style=color:#00009f>struct</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> greeter</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">UnimplementedGreeterServer</span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>func</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">greeterService</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token function" style=color:#d73a49>SayHello</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> ctx context</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">Context</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> request </span><span class="token operator" style=color:#393A34>*</span><span class="token plain">greeter</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">HelloRequest</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>(</span><span class="token operator" style=color:#393A34>*</span><span class="token plain">greeter</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">HelloReply</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> </span><span class="token builtin">error</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>return</span><span class="token plain"> </span><span class="token operator" style=color:#393A34>&</span><span class="token plain">greeter</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">HelloReply</span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain">Reply</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Hello, "</span><span class="token plain"> </span><span class="token operator" style=color:#393A34>+</span><span class="token plain"> request</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">Name</span><span class="token punctuation" style=color:#393A34>}</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> </span><span class="token boolean" style=color:#36acaa>nil</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>func</span><span class="token plain"> </span><span class="token function" style=color:#d73a49>main</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> listener</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> err </span><span class="token operator" style=color:#393A34>:=</span><span class="token plain"> net</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>Listen</span><span class="token punctuation" style=color:#393A34>(</span><span class="token string" style=color:#e3116c>"tcp"</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>":50051"</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>if</span><span class="token plain"> err </span><span class="token operator" style=color:#393A34>!=</span><span class="token plain"> </span><span class="token boolean" style=color:#36acaa>nil</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> log</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>Fatal</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">err</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> server </span><span class="token operator" style=color:#393A34>:=</span><span class="token plain"> grpc</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>NewServer</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> grpc</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>ForceServerCodecV2</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">greeter</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">CodecV2</span><span class="token punctuation" style=color:#393A34>{</span><span class="token punctuation" style=color:#393A34>}</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> greeter</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>RegisterGreeterServer</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">server</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> greeterService</span><span class="token punctuation" style=color:#393A34>{</span><span class="token punctuation" style=color:#393A34>}</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>if</span><span class="token plain"> err </span><span class="token operator" style=color:#393A34>:=</span><span class="token plain"> server</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>Serve</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">listener</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"> err </span><span class="token operator" style=color:#393A34>!=</span><span class="token plain"> </span><span class="token boolean" style=color:#36acaa>nil</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> log</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>Fatal</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">err</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><br/></div></code></pre></div></div> |
| <p><code>grpc.ForceServerCodecV2(...)</code> is required so the server decodes incoming frames |
| with the generated Fory codec instead of the default protobuf codec.</p> |
| <p>Use the zero-value generated <code>CodecV2{}</code> for the service schema. The generated |
| client methods force the same codec for outgoing calls.</p> |
| <h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=create-a-client>Create a Client<a href=#create-a-client class=hash-link aria-label="Direct link to Create a Client" title="Direct link to Create a Client" translate=no></a></h2> |
| <p>The generated client constructor accepts a grpc-go connection. Generated client |
| methods force the generated Fory codec for each call.</p> |
| <div class="language-go codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-go codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token keyword" style=color:#00009f>package</span><span class="token plain"> main</span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>import</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token string" style=color:#e3116c>"context"</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token string" style=color:#e3116c>"fmt"</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token string" style=color:#e3116c>"log"</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token string" style=color:#e3116c>"time"</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token string" style=color:#e3116c>"google.golang.org/grpc"</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token string" style=color:#e3116c>"google.golang.org/grpc/credentials/insecure"</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token string" style=color:#e3116c>"example.com/app/generated/go/greeter"</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token keyword" style=color:#00009f>func</span><span class="token plain"> </span><span class="token function" style=color:#d73a49>main</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> conn</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> err </span><span class="token operator" style=color:#393A34>:=</span><span class="token plain"> grpc</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>NewClient</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token string" style=color:#e3116c>"localhost:50051"</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> grpc</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>WithTransportCredentials</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">insecure</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>NewCredentials</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>if</span><span class="token plain"> err </span><span class="token operator" style=color:#393A34>!=</span><span class="token plain"> </span><span class="token boolean" style=color:#36acaa>nil</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> log</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>Fatal</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">err</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>defer</span><span class="token plain"> conn</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>Close</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> client </span><span class="token operator" style=color:#393A34>:=</span><span class="token plain"> greeter</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>NewGreeterClient</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">conn</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> ctx</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> cancel </span><span class="token operator" style=color:#393A34>:=</span><span class="token plain"> context</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>WithTimeout</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">context</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>Background</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> </span><span class="token number" style=color:#36acaa>5</span><span class="token operator" style=color:#393A34>*</span><span class="token plain">time</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">Second</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>defer</span><span class="token plain"> </span><span class="token function" style=color:#d73a49>cancel</span><span class="token punctuation" style=color:#393A34>(</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain" style=display:inline-block></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> reply</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> err </span><span class="token operator" style=color:#393A34>:=</span><span class="token plain"> client</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>SayHello</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">ctx</span><span class="token punctuation" style=color:#393A34>,</span><span class="token plain"> </span><span class="token operator" style=color:#393A34>&</span><span class="token plain">greeter</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">HelloRequest</span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain">Name</span><span class="token punctuation" style=color:#393A34>:</span><span class="token plain"> </span><span class="token string" style=color:#e3116c>"Fory"</span><span class="token punctuation" style=color:#393A34>}</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>if</span><span class="token plain"> err </span><span class="token operator" style=color:#393A34>!=</span><span class="token plain"> </span><span class="token boolean" style=color:#36acaa>nil</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> log</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>Fatal</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">err</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>}</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> fmt</span><span class="token punctuation" style=color:#393A34>.</span><span class="token function" style=color:#d73a49>Println</span><span class="token punctuation" style=color:#393A34>(</span><span class="token plain">reply</span><span class="token punctuation" style=color:#393A34>.</span><span class="token plain">Reply</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><br/></div></code></pre></div></div> |
| <h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=streaming-rpcs>Streaming RPCs<a href=#streaming-rpcs class=hash-link aria-label="Direct link to Streaming RPCs" title="Direct link to Streaming RPCs" translate=no></a></h2> |
| <p>Fory service definitions can use unary, server-streaming, client-streaming, and |
| bidirectional streaming RPC shapes:</p> |
| <div class="language-protobuf codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-protobuf codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token keyword" style=color:#00009f>service</span><span class="token plain"> </span><span class="token class-name">Greeter</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>{</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>rpc</span><span class="token plain"> </span><span class="token function" style=color:#d73a49>SayHello</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>(</span><span class="token class-name">HelloRequest</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>returns</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>(</span><span class="token class-name">HelloReply</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>rpc</span><span class="token plain"> </span><span class="token function" style=color:#d73a49>LotsOfReplies</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>(</span><span class="token class-name">HelloRequest</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>returns</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>(</span><span class="token keyword" style=color:#00009f>stream</span><span class="token plain"> </span><span class="token class-name">HelloReply</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>rpc</span><span class="token plain"> </span><span class="token function" style=color:#d73a49>LotsOfGreetings</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>(</span><span class="token keyword" style=color:#00009f>stream</span><span class="token plain"> </span><span class="token class-name">HelloRequest</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>returns</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>(</span><span class="token class-name">HelloReply</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"> </span><span class="token keyword" style=color:#00009f>rpc</span><span class="token plain"> </span><span class="token function" style=color:#d73a49>Chat</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>(</span><span class="token keyword" style=color:#00009f>stream</span><span class="token plain"> </span><span class="token class-name">HelloRequest</span><span class="token punctuation" style=color:#393A34>)</span><span class="token plain"> </span><span class="token keyword" style=color:#00009f>returns</span><span class="token plain"> </span><span class="token punctuation" style=color:#393A34>(</span><span class="token keyword" style=color:#00009f>stream</span><span class="token plain"> </span><span class="token class-name">HelloReply</span><span class="token punctuation" style=color:#393A34>)</span><span class="token punctuation" style=color:#393A34>;</span><span class="token plain"></span><br/></div><div class=token-line style=color:#393A34><span class="token plain"></span><span class="token punctuation" style=color:#393A34>}</span><br/></div></code></pre></div></div> |
| <p>Generated Go code follows grpc-go conventions:</p> |
| <ul> |
| <li class="">Unary methods take <code>context.Context</code>, a request pointer, and return a response |
| pointer plus <code>error</code>.</li> |
| <li class="">Server-streaming client methods return a generated stream client.</li> |
| <li class="">Client-streaming server methods receive a generated stream server.</li> |
| <li class="">Bidirectional streaming methods use generated stream client and server |
| interfaces.</li> |
| <li class="">The generated codec is used for every message frame, including streaming |
| frames.</li> |
| </ul> |
| <h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=grpc-runtime-behavior>gRPC Runtime Behavior<a href=#grpc-runtime-behavior class=hash-link aria-label="Direct link to gRPC Runtime Behavior" title="Direct link to gRPC Runtime Behavior" translate=no></a></h2> |
| <p>The generated service companion only supplies Fory serialization. Operational |
| behavior remains standard grpc-go behavior:</p> |
| <ul> |
| <li class="">Deadlines and cancellations</li> |
| <li class="">TLS and credentials</li> |
| <li class="">Unary and stream interceptors</li> |
| <li class="">Status codes and metadata</li> |
| <li class="">Name resolution and load balancing</li> |
| <li class="">Connection lifecycle and backoff</li> |
| </ul> |
| <h2 class="anchor anchorTargetStickyNavbar_Vzrq" id=troubleshooting>Troubleshooting<a href=#troubleshooting class=hash-link aria-label="Direct link to Troubleshooting" title="Direct link to Troubleshooting" translate=no></a></h2> |
| <h3 class="anchor anchorTargetStickyNavbar_Vzrq" id=missing-googlegolangorggrpc-packages>Missing <code>google.golang.org/grpc</code> Packages<a href=#missing-googlegolangorggrpc-packages class=hash-link aria-label="Direct link to missing-googlegolangorggrpc-packages" title="Direct link to missing-googlegolangorggrpc-packages" translate=no></a></h3> |
| <p>Add grpc-go to your module:</p> |
| <div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style=--prism-color:#393A34;--prism-background-color:#f6f8fa><div class=codeBlockContent_QJqH><pre tabindex=0 class="prism-code language-bash codeBlock_bY9V thin-scrollbar" style=color:#393A34;background-color:#f6f8fa><code class=codeBlockLines_e6Vv><div class=token-line style=color:#393A34><span class="token plain">go get google.golang.org/grpc</span><br/></div></code></pre></div></div> |
| <h3 class="anchor anchorTargetStickyNavbar_Vzrq" id=grpc-error-while-marshaling><code>grpc: error while marshaling</code><a href=#grpc-error-while-marshaling class=hash-link aria-label="Direct link to grpc-error-while-marshaling" title="Direct link to grpc-error-while-marshaling" translate=no></a></h3> |
| <p>Confirm that both the client and server use the generated <code>CodecV2{}</code> and that |
| the generated model file is compiled into the same package as the gRPC companion.</p> |
| <h3 class="anchor anchorTargetStickyNavbar_Vzrq" id=unimplemented><code>UNIMPLEMENTED</code><a href=#unimplemented class=hash-link aria-label="Direct link to unimplemented" title="Direct link to unimplemented" translate=no></a></h3> |
| <p>Confirm that the generated service was registered with |
| <code>RegisterGreeterServer(...)</code>, and that the client and server were generated from |
| the same package, service, and method names.</p> |
| <h3 class="anchor anchorTargetStickyNavbar_Vzrq" id=protobuf-clients-cannot-decode-the-service>Protobuf Clients Cannot Decode the Service<a href=#protobuf-clients-cannot-decode-the-service class=hash-link aria-label="Direct link to Protobuf Clients Cannot Decode the Service" title="Direct link to Protobuf Clients Cannot Decode the Service" translate=no></a></h3> |
| <p>Fory gRPC companions do not use protobuf wire encoding for messages. Use a |
| Fory-generated client for Fory-generated services, or provide a separate |
| protobuf service endpoint for generic protobuf clients.</div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="row margin-top--sm theme-doc-footer-edit-meta-row"><div class="col noPrint_WFHX"><a href=https://github.com/apache/fory-site/tree/main/docs/guide/go/grpc-support.md target=_blank rel="noopener noreferrer" class=theme-edit-this-page><svg fill=currentColor height=20 width=20 viewBox="0 0 40 40" class=iconEdit_Z9Sw aria-hidden=true><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"/></g></svg>Edit this page</a></div><div class="col lastUpdated_JAkA"></div></div></footer></article><nav class="docusaurus-mt-lg pagination-nav" aria-label="Docs pages"><a class="pagination-nav__link pagination-nav__link--prev" href=/docs/guide/go/thread_safety><div class=pagination-nav__sublabel>Previous</div><div class=pagination-nav__label>Thread Safety</div></a><a class="pagination-nav__link pagination-nav__link--next" href=/docs/guide/go/troubleshooting><div class=pagination-nav__sublabel>Next</div><div class=pagination-nav__label>Troubleshooting</div></a></nav></div></div><div class="col col--3"><div class="tableOfContents_bqdL thin-scrollbar theme-doc-toc-desktop"><ul class="table-of-contents table-of-contents__left-border"><li><a href=#add-dependencies class="table-of-contents__link toc-highlight">Add Dependencies</a><li><a href=#define-a-service class="table-of-contents__link toc-highlight">Define a Service</a><li><a href=#implement-a-server class="table-of-contents__link toc-highlight">Implement a Server</a><li><a href=#create-a-client class="table-of-contents__link toc-highlight">Create a Client</a><li><a href=#streaming-rpcs class="table-of-contents__link toc-highlight">Streaming RPCs</a><li><a href=#grpc-runtime-behavior class="table-of-contents__link toc-highlight">gRPC Runtime Behavior</a><li><a href=#troubleshooting class="table-of-contents__link toc-highlight">Troubleshooting</a><ul><li><a href=#missing-googlegolangorggrpc-packages class="table-of-contents__link toc-highlight">Missing <code>google.golang.org/grpc</code> Packages</a><li><a href=#grpc-error-while-marshaling class="table-of-contents__link toc-highlight"><code>grpc: error while marshaling</code></a><li><a href=#unimplemented class="table-of-contents__link toc-highlight"><code>UNIMPLEMENTED</code></a><li><a href=#protobuf-clients-cannot-decode-the-service class="table-of-contents__link toc-highlight">Protobuf Clients Cannot Decode the Service</a></ul></ul></div></div></div></div></main></div></div></div><footer class="theme-layout-footer footer footer--dark"><div class="container container-fluid"><div class="row footer__links"><div class="theme-layout-footer-column col footer__col"><div class=footer__title>Community</div><ul class="footer__items clean-list"><li class=footer__item><a 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| <p> |
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