信息交换扩展

扩展说明

基于传输层之上，实现 Request-Response 信息交换语义。

扩展接口

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

扩展配置

  1. <dubbo:protocol exchanger="xxx" />
  2. <!-- 缺省值设置，当<dubbo:protocol>没有配置exchanger属性时，使用此配置 -->
  3. <dubbo:provider exchanger="xxx" />

已知扩展

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

扩展示例

Maven 项目结构：

  1. src
  2.  |-main
  3.     |-java
  4.         |-com
  5.             |-xxx
  6.                 |-XxxExchanger.java (实现Exchanger接口)
  7.                 |-XxxExchangeServer.java (实现ExchangeServer接口)
  8.                 |-XxxExchangeClient.java (实现ExchangeClient接口)
  9.     |-resources
  10.         |-META-INF
  11.             |-dubbo
  12.                 |-org.apache.dubbo.remoting.exchange.Exchanger (纯文本文件，内容为：xxx=com.xxx.XxxExchanger)

XxxExchanger.java：

  1. package com.xxx;
  3. import org.apache.dubbo.remoting.exchange.Exchanger;
  6. public class XxxExchanger implements Exchanger {
  7.     public ExchangeServer bind(URL url, ExchangeHandler handler) throws RemotingException {
  8.         return new XxxExchangeServer(url, handler);
  9.     }
  10.     public ExchangeClient connect(URL url, ExchangeHandler handler) throws RemotingException {
  11.         return new XxxExchangeClient(url, handler);
  12.     }
  13. }

XxxExchangeServer.java：

  2. package com.xxx;
  4. import org.apache.dubbo.remoting.exchange.ExchangeServer;
  6. public class XxxExchangeServer impelements ExchangeServer {
  7.     // ...
  8. }

XxxExchangeClient.java：

  1. package com.xxx;
  3. import org.apache.dubbo.remoting.exchange.ExchangeClient;
  5. public class XxxExchangeClient impelments ExchangeClient {
  6.     // ...
  7. }

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

  1. xxx=com.xxx.XxxExchanger

最后修改 September 21, 2021: Bug fix miss mialbox (#953) (57cf51b)