Information Exchange Extension

Information Exchange Extension

Extension Description

Implement the Request-Response information exchange semantics based on the transport layer.

Extension Interfaces

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 value setting, when <dubbo:protocol> does not configure the exchanger attribute, this configuration is used -->
<dubbo:provider exchanger="xxx" />

Known Extension

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

Extension Example

Maven project structure:

src
 |-main
    |-java
        |-com
            |-xxx
                |-XxxExchanger.java (implements Exchanger interface)
                |-XxxExchangeServer.java (implements ExchangeServer interface)
                |-XxxExchangeClient.java (implements ExchangeClient interface)
    |-resources
        |-META-INF
            |-dubbo
                |-org.apache.dubbo.remoting.exchange.Exchanger (plain text file, 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

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Last modified September 30, 2024: Update & Translate Overview Docs (#3040) (d37ebceaea7)