调用拦截扩展

<!-- Consumer call process interception -->
<dubbo:reference filter="xxx,yyy" />
<!-- The default interceptor of the consumer call process, which will intercept all references -->
<dubbo:consumer filter="xxx,yyy"/>
<!-- provider call process interception -->
<dubbo:service filter="xxx,yyy" />
<!-- Provider call process default interceptor, will intercept all services -->
<dubbo:provider filter="xxx,yyy"/>

src
 |-main
    |-java
        |-com
            |-xxx
                |-XxxFilter.java (implement the Filter interface)
    |-resources
        |-META-INF
            |-dubbo
                |-org.apache.dubbo.rpc.Filter (plain text file, content: xxx=com.xxx.XxxFilter)

package com.xxx;
 
import org.apache.dubbo.rpc.Filter;
import org.apache.dubbo.rpc.Invoker;
import org.apache.dubbo.rpc.Invocation;
import org.apache.dubbo.rpc.Result;
import org.apache.dubbo.rpc.RpcException;
 
public class XxxFilter implements Filter {
    public Result invoke(Invoker<?> invoker, Invocation invocation) throws RpcException {
        // before filter...
        Result result = invoker.invoke(invocation);
        // after filter...
        return result;
    }
}

xxx=com.xxx.XxxFilter