Sofa Proxy

This document is intended to help the Sofa service access the Apache ShenYu gateway. The Apache ShenYu gateway uses the Sofa plugin to handle sofa service.

Before the connection, start shenyu-admin correctly, start Sofa plugin, and add related dependencies on the gateway and Sofa application client. Refer to the previous Quick start with Sofa .

For details about client access configuration, see Application Client Access Config .

For details about data synchronization configurations, see Data Synchronization Config .

Add sofa plugin in gateway

• Add the following dependencies in the gateway's pom.xml file：

• Replace the sofa version with yours, and replace the jar package in the registry with yours, The following is a reference。

  
         <dependency>           <groupId>com.alipay.sofa</groupId>           <artifactId>sofa-rpc-all</artifactId>           <version>5.7.6</version>           <exclusions>               <exclusion>                   <groupId>net.jcip</groupId>                   <artifactId>jcip-annotations</artifactId>               </exclusion>           </exclusions>       </dependency>       <dependency>           <groupId>org.apache.curator</groupId>           <artifactId>curator-client</artifactId>           <version>4.0.1</version>       </dependency>       <dependency>           <groupId>org.apache.curator</groupId>           <artifactId>curator-framework</artifactId>           <version>4.0.1</version>       </dependency>       <dependency>           <groupId>org.apache.curator</groupId>           <artifactId>curator-recipes</artifactId>           <version>4.0.1</version>       </dependency>       <dependency>           <groupId>org.apache.shenyu</groupId>           <artifactId>shenyu-spring-boot-starter-plugin-sofa</artifactId>           <version>${project.version}</version>       </dependency>

* Restart the gateway service.
## Sofa service access gateway
you can refer to：[shenyu-examples-sofa](https://github.com/apache/incubator-shenyu/tree/v2.4.0/shenyu-examples/shenyu-examples-sofa)
* SpringBoot
Add the following dependencies:
 ```xml        <dependency>            <groupId>org.apache.shenyu</groupId>            <artifactId>shenyu-spring-boot-starter-client-sofa</artifactId>            <version>${shenyu.version}</version>        </dependency>

• Spring

Add the following dependencies:

        <dependency>            <groupId>org.apache.shenyu</groupId>            <artifactId>shenyu-client-sofa</artifactId>            <version>${shenyu.version}</version>        </dependency>

Add the following in the xml file of your bean definition:

        <bean id ="sofaServiceBeanPostProcessor" class ="org.apache.shenyu.client.sofa.SofaServiceBeanPostProcessor">             <constructor-arg  ref="shenyuRegisterCenterConfig"/>        </bean>
     <bean id="shenyuRegisterCenterConfig" class="org.apache.shenyu.register.common.config.ShenyuRegisterCenterConfig">       <property name="registerType" value="http"/>       <property name="serverList" value="http://localhost:9095"/>       <property name="props">            <map>                 <entry key="contextPath" value="/your contextPath"/>                 <entry key="appName" value="your name"/>                 <entry key="isFull" value="false"/>            </map>       </property>    </bean>

Plugin Settings

• First in the shenyu-admin plugin management, set the sofa plugin to open.

• Secondly, configure your registered address in the sofa plugin, or the address of other registry.

{"protocol":"zookeeper","register":"127.0.0.1:2181"}

Interface registered to the gateway

• For your sofa service implementation class, add @ShenyuSofaClient annotation to the method，Indicates that the interface method is registered to the gateway.

• Start the sofa service provider, after successful registration, enter the pluginList -> rpc proxy -> sofa in the background management system, you will see the automatic registration of selectors and rules information.

User request and parameter description

ShenYu gateway needs to have a routing prefix, this routing prefix is for you to access the project for configuration contextPath .

For example, if you have an order service, it has an interface and its registration path /order/test/save

Now it's to request the gateway via post：http://localhost:9195/order/test/save

Where localhost:9195 is the IP port of the gateway, default port is 9195, /order is the contextPath of your sofa access gateway configuration

• Parameter passing：

  • Access the gateway through http post，and pass through body and json.
  • For more parameter type transfer, please refer to the interface definition in shenyu-examples-sofa and the parameter transfer method.

• Single java bean parameter type (default)

• Customize multi-parameter support:

• In the gateway project you built, add a new class MySofaParamResolveService, implements org.apache.shenyu.plugin.api.sofa.SofaParamResolveService .

     public interface SofaParamResolveService {
         /**        * Build parameter pair.        * this is Resolve http body to get sofa param.        *        * @param body           the body        * @param parameterTypes the parameter types        * @return the pair        */       Pair<String[], Object[]> buildParameter(String body, String parameterTypes);   }

• body is the json string passed by body in http.

• parameterTypes: list of matched method parameter types, If there are multiple, use , to separate.

• In Pair，left is the parameter type，and right is the parameter value. This is the standard for sofa generalization calls.

• Register your class as a String bean and override the default implementation.

  @Beanpublic SofaParamResolveService mySofaParamResolveService() {   return new MySofaParamResolveService();}