content/references/java-chassis/en_US/build-consumer/3rd-party-service-invoke/index.html - servicecomb-website - Git at Google


 <!doctype html>
 <html lang="en" class="no-js">
   <head>

       <meta charset="utf-8">
       <meta name="viewport" content="width=device-width,initial-scale=1">


         <link rel="prev" href="../fault-injection/">


         <link rel="next" href="../../transports/rest-over-servlet/">


       <link rel="icon" href="../../assets/images/favicon.png">
       <meta name="generator" content="mkdocs-1.6.0, mkdocs-material-9.5.19">


         <title>Invoke 3rd-party REST services - ServiceComb Java Chassis Developers Guide</title>


       <link rel="stylesheet" href="../../assets/stylesheets/main.66ac8b77.min.css">


         <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
         <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:300,300i,400,400i,700,700i%7CRoboto+Mono:400,400i,700,700i&display=fallback">
         <style>:root{--md-text-font:"Roboto";--md-code-font:"Roboto Mono"}</style>


     <script>__md_scope=new URL("../..",location),__md_hash=e=>[...e].reduce((e,_)=>(e<<5)-e+_.charCodeAt(0),0),__md_get=(e,_=localStorage,t=__md_scope)=>JSON.parse(_.getItem(t.pathname+"."+e)),__md_set=(e,_,t=localStorage,a=__md_scope)=>{try{t.setItem(a.pathname+"."+e,JSON.stringify(_))}catch(e){}}</script>


   </head>


     <body dir="ltr">


     <input class="md-toggle" data-md-toggle="drawer" type="checkbox" id="__drawer" autocomplete="off">
     <input class="md-toggle" data-md-toggle="search" type="checkbox" id="__search" autocomplete="off">
     <label class="md-overlay" for="__drawer"></label>
     <div data-md-component="skip">


         <a href="#invoking-3rd-party-rest-service" class="md-skip">
           Skip to content
         </a>

     </div>
     <div data-md-component="announce">

     </div>


 <header class="md-header md-header--shadow" data-md-component="header">
   <nav class="md-header__inner md-grid" aria-label="Header">
     <a href="../.." title="ServiceComb Java Chassis Developers Guide" class="md-header__button md-logo" aria-label="ServiceComb Java Chassis Developers Guide" data-md-component="logo">


   <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M12 8a3 3 0 0 0 3-3 3 3 0 0 0-3-3 3 3 0 0 0-3 3 3 3 0 0 0 3 3m0 3.54C9.64 9.35 6.5 8 3 8v11c3.5 0 6.64 1.35 9 3.54 2.36-2.19 5.5-3.54 9-3.54V8c-3.5 0-6.64 1.35-9 3.54Z"/></svg>

     </a>
     <label class="md-header__button md-icon" for="__drawer">

       <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M3 6h18v2H3V6m0 5h18v2H3v-2m0 5h18v2H3v-2Z"/></svg>
     </label>
     <div class="md-header__title" data-md-component="header-title">
       <div class="md-header__ellipsis">
         <div class="md-header__topic">
           <span class="md-ellipsis">
             ServiceComb Java Chassis Developers Guide
           </span>
         </div>
         <div class="md-header__topic" data-md-component="header-topic">
           <span class="md-ellipsis">

               Invoke 3rd-party REST services

           </span>
         </div>
       </div>
     </div>


       <script>var media,input,key,value,palette=__md_get("__palette");if(palette&&palette.color){"(prefers-color-scheme)"===palette.color.media&&(media=matchMedia("(prefers-color-scheme: light)"),input=document.querySelector(media.matches?"[data-md-color-media='(prefers-color-scheme: light)']":"[data-md-color-media='(prefers-color-scheme: dark)']"),palette.color.media=input.getAttribute("data-md-color-media"),palette.color.scheme=input.getAttribute("data-md-color-scheme"),palette.color.primary=input.getAttribute("data-md-color-primary"),palette.color.accent=input.getAttribute("data-md-color-accent"));for([key,value]of Object.entries(palette.color))document.body.setAttribute("data-md-color-"+key,value)}</script>


       <label class="md-header__button md-icon" for="__search">

         <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M9.5 3A6.5 6.5 0 0 1 16 9.5c0 1.61-.59 3.09-1.56 4.23l.27.27h.79l5 5-1.5 1.5-5-5v-.79l-.27-.27A6.516 6.516 0 0 1 9.5 16 6.5 6.5 0 0 1 3 9.5 6.5 6.5 0 0 1 9.5 3m0 2C7 5 5 7 5 9.5S7 14 9.5 14 14 12 14 9.5 12 5 9.5 5Z"/></svg>
       </label>
       <div class="md-search" data-md-component="search" role="dialog">
   <label class="md-search__overlay" for="__search"></label>
   <div class="md-search__inner" role="search">
     <form class="md-search__form" name="search">
       <input type="text" class="md-search__input" name="query" aria-label="Search" placeholder="Search" autocapitalize="off" autocorrect="off" autocomplete="off" spellcheck="false" data-md-component="search-query" required>
       <label class="md-search__icon md-icon" for="__search">

         <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M9.5 3A6.5 6.5 0 0 1 16 9.5c0 1.61-.59 3.09-1.56 4.23l.27.27h.79l5 5-1.5 1.5-5-5v-.79l-.27-.27A6.516 6.516 0 0 1 9.5 16 6.5 6.5 0 0 1 3 9.5 6.5 6.5 0 0 1 9.5 3m0 2C7 5 5 7 5 9.5S7 14 9.5 14 14 12 14 9.5 12 5 9.5 5Z"/></svg>

         <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 11v2H8l5.5 5.5-1.42 1.42L4.16 12l7.92-7.92L13.5 5.5 8 11h12Z"/></svg>
       </label>
       <nav class="md-search__options" aria-label="Search">

         <button type="reset" class="md-search__icon md-icon" title="Clear" aria-label="Clear" tabindex="-1">

           <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M19 6.41 17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12 19 6.41Z"/></svg>
         </button>
       </nav>

     </form>
     <div class="md-search__output">
       <div class="md-search__scrollwrap" data-md-scrollfix>
         <div class="md-search-result" data-md-component="search-result">
           <div class="md-search-result__meta">
             Initializing search
           </div>
           <ol class="md-search-result__list" role="presentation"></ol>
         </div>
       </div>
     </div>
   </div>
 </div>


   </nav>

 </header>

     <div class="md-container" data-md-component="container">


       <main class="md-main" data-md-component="main">
         <div class="md-main__inner md-grid">


               <div class="md-sidebar md-sidebar--primary" data-md-component="sidebar" data-md-type="navigation" >
                 <div class="md-sidebar__scrollwrap">
                   <div class="md-sidebar__inner">


 <nav class="md-nav md-nav--primary" aria-label="Navigation" data-md-level="0">
   <label class="md-nav__title" for="__drawer">
     <a href="../.." title="ServiceComb Java Chassis Developers Guide" class="md-nav__button md-logo" aria-label="ServiceComb Java Chassis Developers Guide" data-md-component="logo">


   <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M12 8a3 3 0 0 0 3-3 3 3 0 0 0-3-3 3 3 0 0 0-3 3 3 3 0 0 0 3 3m0 3.54C9.64 9.35 6.5 8 3 8v11c3.5 0 6.64 1.35 9 3.54 2.36-2.19 5.5-3.54 9-3.54V8c-3.5 0-6.64 1.35-9 3.54Z"/></svg>

     </a>
     ServiceComb Java Chassis Developers Guide
   </label>

   <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../.." class="md-nav__link">


   <span class="md-ellipsis">
     Introduction
   </span>


       </a>
     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_2" >


           <label class="md-nav__link" for="__nav_2" id="__nav_2_label" tabindex="0">


   <span class="md-ellipsis">
     Getting Started
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_2_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_2">
             <span class="md-nav__icon md-icon"></span>
             Getting Started
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../../start/terminology/" class="md-nav__link">


   <span class="md-ellipsis">
     Glossary
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../start/architecture/" class="md-nav__link">


   <span class="md-ellipsis">
     Architecture
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../start/development-environment/" class="md-nav__link">


   <span class="md-ellipsis">
     Development environment
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../start/first-sample/" class="md-nav__link">


   <span class="md-ellipsis">
     Develop the first microservice
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_3" >


           <label class="md-nav__link" for="__nav_3" id="__nav_3_label" tabindex="0">


   <span class="md-ellipsis">
     Development Service Provider
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_3_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_3">
             <span class="md-nav__icon md-icon"></span>
             Development Service Provider
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../../build-provider/definition/service-definition/" class="md-nav__link">


   <span class="md-ellipsis">
     Service definition
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/define-contract/" class="md-nav__link">


   <span class="md-ellipsis">
     Service contract definition
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/code-first/" class="md-nav__link">


   <span class="md-ellipsis">
     Implicit API definition
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/swagger-annotation/" class="md-nav__link">


   <span class="md-ellipsis">
     Use Swagger annotations
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/springmvc/" class="md-nav__link">


   <span class="md-ellipsis">
     Develop with SpringMVC
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/jaxrs/" class="md-nav__link">


   <span class="md-ellipsis">
     Develop with JAX-RS
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/transparent-rpc/" class="md-nav__link">


   <span class="md-ellipsis">
     Develop with Transparent RPC
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/interface-constraints/" class="md-nav__link">


   <span class="md-ellipsis">
     Interface definition and data type
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/listen-address-and-publish-address/" class="md-nav__link">


   <span class="md-ellipsis">
     Service listening address and publishing address
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/thread-pool/" class="md-nav__link">


   <span class="md-ellipsis">
     Thread pool
   </span>


       </a>
     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_3_11" >


           <label class="md-nav__link" for="__nav_3_11" id="__nav_3_11_label" tabindex="0">


   <span class="md-ellipsis">
     Service Configuration
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="2" aria-labelledby="__nav_3_11_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_3_11">
             <span class="md-nav__icon md-icon"></span>
             Service Configuration
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../../build-provider/configuration/ratelimite-strategy/" class="md-nav__link">


   <span class="md-ellipsis">
     Rate Limiting Policy
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/configuration/parameter-validator/" class="md-nav__link">


   <span class="md-ellipsis">
     Parameter Validator
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/bootup/" class="md-nav__link">


   <span class="md-ellipsis">
     Boot-up Process
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../build-provider/access-log-configuration/" class="md-nav__link">


   <span class="md-ellipsis">
     Access Log Configuration
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


     <li class="md-nav__item md-nav__item--active md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_4" checked>


           <label class="md-nav__link" for="__nav_4" id="__nav_4_label" tabindex="0">


   <span class="md-ellipsis">
     Writing Service Consumer
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_4_label" aria-expanded="true">
           <label class="md-nav__title" for="__nav_4">
             <span class="md-nav__icon md-icon"></span>
             Writing Service Consumer
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../common-configuration/" class="md-nav__link">


   <span class="md-ellipsis">
     Consumer common configuration
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../using-resttemplate/" class="md-nav__link">


   <span class="md-ellipsis">
     Using Rest Template
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../using-AsyncRestTemplate/" class="md-nav__link">


   <span class="md-ellipsis">
     Using AsyncRestTemplate
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../develop-consumer-using-rpc/" class="md-nav__link">


   <span class="md-ellipsis">
     Using with RPC
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../with-contract/" class="md-nav__link">


   <span class="md-ellipsis">
     Contract
   </span>


       </a>
     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_4_6" >


           <label class="md-nav__link" for="__nav_4_6" id="__nav_4_6_label" tabindex="0">


   <span class="md-ellipsis">
     Invoke control
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="2" aria-labelledby="__nav_4_6_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_4_6">
             <span class="md-nav__icon md-icon"></span>
             Invoke control
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../flow-control/" class="md-nav__link">


   <span class="md-ellipsis">
     Flow Control
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../fault-injection/" class="md-nav__link">


   <span class="md-ellipsis">
     Fault Injection
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


     <li class="md-nav__item md-nav__item--active">

       <input class="md-nav__toggle md-toggle" type="checkbox" id="__toc">


         <label class="md-nav__link md-nav__link--active" for="__toc">


   <span class="md-ellipsis">
     Invoke 3rd-party REST services
   </span>


           <span class="md-nav__icon md-icon"></span>
         </label>

       <a href="./" class="md-nav__link md-nav__link--active">


   <span class="md-ellipsis">
     Invoke 3rd-party REST services
   </span>


       </a>


 <nav class="md-nav md-nav--secondary" aria-label="Table of contents">


     <label class="md-nav__title" for="__toc">
       <span class="md-nav__icon md-icon"></span>
       Table of contents
     </label>
     <ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>

         <li class="md-nav__item">
   <a href="#concept-description" class="md-nav__link">
     <span class="md-ellipsis">
       Concept Description
     </span>
   </a>

 </li>

         <li class="md-nav__item">
   <a href="#sample-code" class="md-nav__link">
     <span class="md-ellipsis">
       Sample Code
     </span>
   </a>

 </li>

     </ul>

 </nav>

     </li>


           </ul>
         </nav>

     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_5" >


           <label class="md-nav__link" for="__nav_5" id="__nav_5_label" tabindex="0">


   <span class="md-ellipsis">
     Transports
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_5_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_5">
             <span class="md-nav__icon md-icon"></span>
             Transports
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../../transports/rest-over-servlet/" class="md-nav__link">


   <span class="md-ellipsis">
     REST over Servlet
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../transports/rest-over-vertx/" class="md-nav__link">


   <span class="md-ellipsis">
     REST over Vertx
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../transports/highway-rpc/" class="md-nav__link">


   <span class="md-ellipsis">
     Highway
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../transports/http2/" class="md-nav__link">


   <span class="md-ellipsis">
     HTTP2
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_6" >


           <label class="md-nav__link" for="__nav_6" id="__nav_6_label" tabindex="0">


   <span class="md-ellipsis">
     General Development
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_6_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_6">
             <span class="md-nav__icon md-icon"></span>
             General Development
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../../general-development/visit-sc/" class="md-nav__link">


   <span class="md-ellipsis">
     Access Service Center
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/metrics/" class="md-nav__link">


   <span class="md-ellipsis">
     Metrics
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/microservice-invocation-chain/" class="md-nav__link">


   <span class="md-ellipsis">
     Microservice invocation chain
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/customized-tracing/" class="md-nav__link">


   <span class="md-ellipsis">
     Customized-Tracing
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/local-develop-test/" class="md-nav__link">


   <span class="md-ellipsis">
     Local development and testing
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/http-filter/" class="md-nav__link">


   <span class="md-ellipsis">
     Http Filter
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/file-upload/" class="md-nav__link">


   <span class="md-ellipsis">
     File Uploading
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/file-download/" class="md-nav__link">


   <span class="md-ellipsis">
     File Downloading
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/reactive/" class="md-nav__link">


   <span class="md-ellipsis">
     Reactive Programing
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/dnsconfig/" class="md-nav__link">


   <span class="md-ellipsis">
     DNS Custom Configuration
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/dai-li-she-zhi/" class="md-nav__link">


   <span class="md-ellipsis">
     Proxy Settings
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/report-framework-version/" class="md-nav__link">


   <span class="md-ellipsis">
     Report framework version
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/cross-app-invocation/" class="md-nav__link">


   <span class="md-ellipsis">
     Cross-application invocation
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/secret-field/" class="md-nav__link">


   <span class="md-ellipsis">
     Customized serialization and deserialization
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/context/" class="md-nav__link">


   <span class="md-ellipsis">
     Using Context to pass control messages
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/produceprocess/" class="md-nav__link">


   <span class="md-ellipsis">
     Return value serialization extension
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/CORS/" class="md-nav__link">


   <span class="md-ellipsis">
     CORS mechanism
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/AlarmEvent/" class="md-nav__link">


   <span class="md-ellipsis">
     Get fuse and instance isolation alarm event information
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/shutdown/" class="md-nav__link">


   <span class="md-ellipsis">
     Shutdown gracefully
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/error-handling/" class="md-nav__link">


   <span class="md-ellipsis">
     Handling exceptions
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/multienvironment/" class="md-nav__link">


   <span class="md-ellipsis">
     Multi-environment isolation between microservice instances
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../general-development/thread-model/" class="md-nav__link">


   <span class="md-ellipsis">
     Thread Model
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_7" >


           <label class="md-nav__link" for="__nav_7" id="__nav_7_label" tabindex="0">


   <span class="md-ellipsis">
     Configuration
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_7_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_7">
             <span class="md-nav__icon md-icon"></span>
             Configuration
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../../config/general-config/" class="md-nav__link">


   <span class="md-ellipsis">
     General config
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../config/inject-config/" class="md-nav__link">


   <span class="md-ellipsis">
     Configuration injection
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_8" >


           <label class="md-nav__link" for="__nav_8" id="__nav_8_label" tabindex="0">


   <span class="md-ellipsis">
     Service Capability Open
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_8_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_8">
             <span class="md-nav__icon md-icon"></span>
             Service Capability Open
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../../edge/open-service/" class="md-nav__link">


   <span class="md-ellipsis">
     Intruductions
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../edge/by-servicecomb-sdk/" class="md-nav__link">


   <span class="md-ellipsis">
     Using Edge Service
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../edge/nginx/" class="md-nav__link">


   <span class="md-ellipsis">
     Using confd and Nginx as edge services
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../edge/zuul/" class="md-nav__link">


   <span class="md-ellipsis">
     Use zuul as edge services
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_9" >


           <label class="md-nav__link" for="__nav_9" id="__nav_9_label" tabindex="0">


   <span class="md-ellipsis">
     Service Packing and Running
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_9_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_9">
             <span class="md-nav__icon md-icon"></span>
             Service Packing and Running
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../../packaging/standalone/" class="md-nav__link">


   <span class="md-ellipsis">
     Standalone mode
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../packaging/web-container/" class="md-nav__link">


   <span class="md-ellipsis">
     WEB container mode
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_10" >


           <label class="md-nav__link" for="__nav_10" id="__nav_10_label" tabindex="0">


   <span class="md-ellipsis">
     Micro Service Security
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_10_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_10">
             <span class="md-nav__icon md-icon"></span>
             Micro Service Security
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../../security/tls/" class="md-nav__link">


   <span class="md-ellipsis">
     Using TLS
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../security/rsa/" class="md-nav__link">


   <span class="md-ellipsis">
     Using RSA certification
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_11" >


           <label class="md-nav__link" for="__nav_11" id="__nav_11_label" tabindex="0">


   <span class="md-ellipsis">
     Using java chassis in Spring Boot
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_11_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_11">
             <span class="md-nav__icon md-icon"></span>
             Using java chassis in Spring Boot
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../../using-java-chassis-in-spring-boot/using-java-chassis-in-spring-boot/" class="md-nav__link">


   <span class="md-ellipsis">
     Intruductions
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../using-java-chassis-in-spring-boot/components-for-spring-boot/" class="md-nav__link">


   <span class="md-ellipsis">
     spring boot starter for java-chassis
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../using-java-chassis-in-spring-boot/java-application/" class="md-nav__link">


   <span class="md-ellipsis">
     JAVA application development
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../using-java-chassis-in-spring-boot/web-application/" class="md-nav__link">


   <span class="md-ellipsis">
     Web development method development
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../using-java-chassis-in-spring-boot/diff-between-java-web/" class="md-nav__link">


   <span class="md-ellipsis">
     The difference between JAVA application method and Web development method
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../using-java-chassis-in-spring-boot/diff-spring-mvc/" class="md-nav__link">


   <span class="md-ellipsis">
     The difference in Spring MVC mode
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_12" >


           <label class="md-nav__link" for="__nav_12" id="__nav_12_label" tabindex="0">


   <span class="md-ellipsis">
     Handlers reference
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_12_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_12">
             <span class="md-nav__icon md-icon"></span>
             Handlers reference
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../../references-handlers/intruduction/" class="md-nav__link">


   <span class="md-ellipsis">
     Intruductions
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../references-handlers/loadbalance/" class="md-nav__link">


   <span class="md-ellipsis">
     Load Balancing
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../references-handlers/publickey/" class="md-nav__link">


   <span class="md-ellipsis">
     Public key authentication
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


     <li class="md-nav__item md-nav__item--nested">


         <input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_13" >


           <label class="md-nav__link" for="__nav_13" id="__nav_13_label" tabindex="0">


   <span class="md-ellipsis">
     FAQ
   </span>


             <span class="md-nav__icon md-icon"></span>
           </label>

         <nav class="md-nav" data-md-level="1" aria-labelledby="__nav_13_label" aria-expanded="false">
           <label class="md-nav__title" for="__nav_13">
             <span class="md-nav__icon md-icon"></span>
             FAQ
           </label>
           <ul class="md-nav__list" data-md-scrollfix>


     <li class="md-nav__item">
       <a href="../../question-and-answer/question_answer/" class="md-nav__link">


   <span class="md-ellipsis">
     Q & A
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../question-and-answer/faq/" class="md-nav__link">


   <span class="md-ellipsis">
     FAQ
   </span>


       </a>
     </li>


     <li class="md-nav__item">
       <a href="../../question-and-answer/interface-compatibility/" class="md-nav__link">


   <span class="md-ellipsis">
     Micro Service Interface Compatibility FAQ
   </span>


       </a>
     </li>


           </ul>
         </nav>

     </li>


   </ul>
 </nav>
                   </div>
                 </div>
               </div>


               <div class="md-sidebar md-sidebar--secondary" data-md-component="sidebar" data-md-type="toc" >
                 <div class="md-sidebar__scrollwrap">
                   <div class="md-sidebar__inner">


 <nav class="md-nav md-nav--secondary" aria-label="Table of contents">


     <label class="md-nav__title" for="__toc">
       <span class="md-nav__icon md-icon"></span>
       Table of contents
     </label>
     <ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>

         <li class="md-nav__item">
   <a href="#concept-description" class="md-nav__link">
     <span class="md-ellipsis">
       Concept Description
     </span>
   </a>

 </li>

         <li class="md-nav__item">
   <a href="#sample-code" class="md-nav__link">
     <span class="md-ellipsis">
       Sample Code
     </span>
   </a>

 </li>

     </ul>

 </nav>
                   </div>
                 </div>
               </div>


             <div class="md-content" data-md-component="content">
               <article class="md-content__inner md-typeset">


 <h1 id="invoking-3rd-party-rest-service">Invoking 3rd party REST service</h1>
 <h2 id="concept-description">Concept Description</h2>
 <p>ServiceComb allows users to register the information of 3rd party REST service, including endpoint and swagger, so that users can invoke 3rd party services like invoking ServiceComb provider services.
 Using this feature, all the requests sent to 3rd party service will be processed by consumer handler chain and HttpClientFilters, which means this feature allows service governance function on invoking 3rd party service, and other ServiceComb custom extension mechanism is also supported.</p>
 <h2 id="sample-code">Sample Code</h2>
 <ol>
 <li>Assume that there is a REST 3rd party service, whose listen port is 8080, and rest interface contract is like below:
   ```yaml</li>
 </ol>
 <hr />
 <p>swagger: "2.0"
   info:
     version: "0.0.1"
     title: "3rd party REST service for example"
   basePath: "/rest"
   consumes:
   - "application/json"
   produces:
   - "text/plain"
   paths:
     /{pathVar}:
       get:
         operationId: "testPathVar"
         parameters:
         - name: "pathVar"
           in: "path"
           required: true
           type: "string"
         responses:
           200:
             description: "response of 200, return \"Received, OK. [${pathVar}]\""
             schema:
               type: "string"
   ```</p>
 <ol>
 <li>
 <p>To invoke this service, a java interface class should be written according to the rest contract and annotated by rest annotations.
   The way to write java interface class is similar to writing SpringMVC or JAX-RS style
   ServiceComb provider service. Interface code is like below:
   <code>java
   @Path("/rest")
   @Api(produces = MediaType.TEXT_PLAIN)
   public interface VertxServerIntf {
     @Path("/{pathVar}")
     @GET
     String testPathVar(@PathParam("pathVar") String pathVar);
   }</code></p>
 </li>
 <li>
 <p>Register the information of 3rd party rest service on consumer side:
   <code>java
   String endpoint = "rest://127.0.0.1:8080";
   RegistryUtils.getServiceRegistry().registerMicroserviceMappingByEndpoints(
       // 3rd party rest service name, you can specify the name on your need as long as you obey the microservice naming rule
       "thirdPartyService",
       // service version
       "0.0.1",
       // list of endpoints
       Collections.singletonList(endpoint),
       // java interface class to generate swagger schema
       ThirdPartyRestServiceInterface.class
   );</code></p>
 </li>
 <li>
 <p>Invoke 3rd party rest service in the way similar to invoking ServiceComb provider service.
   Here is a RPC style invoking example:
   ```java
   // declare rpc reference to 3rd party rest service, schemaId is the same as microservice name
   @RpcReference(microserviceName = "thirdPartyService", schemaId = "thirdPartyService")
   ThirdPartyRestServiceInterface thirdPartyRestService;</p>
 </li>
 </ol>
 <p>@RequestMapping(path = "/{pathVar}", method = RequestMethod.GET)
   public String testInvoke(@PathVariable(name = "pathVar") String pathVar) {
     LOGGER.info("testInvoke() is called, pathVar = [{}]", pathVar);
     // invoke 3rd party rest service
     String response = thirdPartyRestService.testPathVar(pathVar);
     LOGGER.info("testInvoke() response = [{}]", response);
     return response;
   }
   ```</p>
 <ol>
 <li>Service governance on invoking 3rd party REST service</li>
 </ol>
 <p>The service governance configuration on invoking 3rd party REST service is similar to the scenario that ServiceComb consumer invokes ServiceComb provider. Take the rate limiting policy for example, the configuration of consumer side microservice.yaml is like below:
   <code>yaml
     servicecomb:
       flowcontrol:
         Consumer:
           qps:
             enabled: true
             limit:
               thirdPartyService: 1</code>
   As the config above, the rate to send request to the service named as "thirdPartyService", which is the 3rd party rest service, is limited to 1QPS.
   When request rate is above 1QPS, consumer will get an <code>InvocationException</code> indicating <code>429 Too Many Requests</code> error.</p>
 <blockquote>
 <p><strong><em>Cautions:</em></strong>
 - endpoint is prefixed with <code>rest</code>, instead of <code>http</code>. You can refer the endpoints registered to service center to write it.
 - One 3rd party REST service can hold multiple endpoints. Consumer side load balance function is supported.
 - Currently the information of a 3rd party service can only be initialized for once. i.e. adding, deleting and modifying is not supported.</p>
 </blockquote>


               </article>
             </div>


 <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script>
         </div>

       </main>

         <footer class="md-footer">

   <div class="md-footer-meta md-typeset">
     <div class="md-footer-meta__inner md-grid">
       <div class="md-copyright">


     Made with
     <a href="https://squidfunk.github.io/mkdocs-material/" target="_blank" rel="noopener">
       Material for MkDocs
     </a>

 </div>

     </div>
   </div>
 </footer>

     </div>
     <div class="md-dialog" data-md-component="dialog">
       <div class="md-dialog__inner md-typeset"></div>
     </div>


     <script id="__config" type="application/json">{"base": "../..", "features": [], "search": "../../assets/javascripts/workers/search.b8dbb3d2.min.js", "translations": {"clipboard.copied": "Copied to clipboard", "clipboard.copy": "Copy to clipboard", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.placeholder": "Type to start searching", "search.result.term.missing": "Missing", "select.version": "Select version"}}</script>


       <script src="../../assets/javascripts/bundle.dd8806f2.min.js"></script>


   </body>
 </html>