文档

合并结果扩展

扩展说明

合并返回结果,用于分组聚合。

扩展接口

org.apache.dubbo.rpc.cluster.Merger

扩展配置

<dubbo:method merger="xxx" />

已知扩展

  • org.apache.dubbo.rpc.cluster.merger.ArrayMerger
  • org.apache.dubbo.rpc.cluster.merger.ListMerger
  • org.apache.dubbo.rpc.cluster.merger.SetMerger
  • org.apache.dubbo.rpc.cluster.merger.MapMerger

扩展示例

Maven 项目结构:

src
 |-main
    |-java
        |-com
            |-xxx
                |-XxxMerger.java (实现Merger接口)
    |-resources
        |-META-INF
            |-dubbo
                |-org.apache.dubbo.rpc.cluster.Merger (纯文本文件,内容为:xxx=com.xxx.XxxMerger)

XxxMerger.java:

package com.xxx;
 
import org.apache.dubbo.rpc.cluster.Merger;
 
public class XxxMerger<T> implements Merger<T> {
    public T merge(T... results) {
        // ...
    }
}

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

xxx=com.xxx.XxxMerger