Exchanger Extension

    Summary

    Exchange message between request and response on network transport layer.

    Extension Interface

    • org.apache.dubbo.remoting.exchange.Exchanger
    • org.apache.dubbo.remoting.exchange.ExchangeServer
    • org.apache.dubbo.remoting.exchange.ExchangeClient

    Extension Configuration

    <dubbo:protocol exchanger="xxx" />
    <!-- default configuration, will take effect if exchanger attribute is not set in <dubbo:protocol> -->
    <dubbo:provider exchanger="xxx" />
    

    Existing Extension

    org.apache.dubbo.remoting.exchange.exchanger.HeaderExchanger

    Extension Guide

    Directory layout:

    src
     |-main
        |-java
            |-com
                |-xxx
                    |-XxxExchanger.java (Exchanger implementation)
                    |-XxxExchangeServer.java (ExchangeServer implementation)
                    |-XxxExchangeClient.java (ExchangeClient implementation)
        |-resources
            |-META-INF
                |-dubbo
                    |-org.apache.dubbo.remoting.exchange.Exchanger (plain text file with the content: xxx=com.xxx.XxxExchanger)
    

    XxxExchanger.java:

    package com.xxx;
     
    import org.apache.dubbo.remoting.exchange.Exchanger;
     
     
    public class XxxExchanger implements Exchanger {
        public ExchangeServer bind(URL url, ExchangeHandler handler) throws RemotingException {
            return new XxxExchangeServer(url, handler);
        }
        public ExchangeClient connect(URL url, ExchangeHandler handler) throws RemotingException {
            return new XxxExchangeClient(url, handler);
        }
    }
    

    XxxExchangeServer.java:

    
    package com.xxx;
     
    import org.apache.dubbo.remoting.exchange.ExchangeServer;
     
    public class XxxExchangeServer impelements ExchangeServer {
        // ...
    }
    

    XxxExchangeClient.java:

    package com.xxx;
     
    import org.apache.dubbo.remoting.exchange.ExchangeClient;
     
    public class XxxExchangeClient impelments ExchangeClient {
        // ...
    }
    

    META-INF/dubbo/org.apache.dubbo.remoting.exchange.Exchanger:

    xxx=com.xxx.XxxExchanger