Router Extension

    Summary

    Pick one from service providers and fire the invocation.

    Extension Interface

    • org.apache.dubbo.rpc.cluster.RouterFactory
    • org.apache.dubbo.rpc.cluster.Router

    Existing Extension

    • org.apache.dubbo.rpc.cluster.router.ScriptRouterFactory
    • org.apache.dubbo.rpc.cluster.router.FileRouterFactory

    Extension Guide

    Directory layout:

    src
     |-main
        |-java
            |-com
                |-xxx
                    |-XxxRouterFactory.java (RouterFactory implementation)
        |-resources
            |-META-INF
                |-dubbo
                    |-org.apache.dubbo.rpc.cluster.RouterFactory (plain text file with the content: xxx=com.xxx.XxxRouterFactory)
    
    

    XxxRouterFactory.java:

    package com.xxx;
     
    import org.apache.dubbo.rpc.cluster.RouterFactory;
    import org.apache.dubbo.rpc.Invoker;
    import org.apache.dubbo.rpc.Invocation;
    import org.apache.dubbo.rpc.RpcException;
     
    public class XxxRouterFactory implements RouterFactory {
        public <T> List<Invoker<T>> select(List<Invoker<T>> invokers, Invocation invocation) throws RpcException {
            // ...
        }
    }
    

    META-INF/dubbo/org.apache.dubbo.rpc.cluster.RouterFactory:

    xxx=com.xxx.XxxRouterFactory