本地存根

<dubbo:consumer interface="com.foo.BarService" stub="true" />

<dubbo:consumer interface="com.foo.BarService" stub="com.foo.BarServiceStub" />

package com.foo;
public class BarServiceStub implements BarService {
    private final BarService barService;
    
    // The constructor passes in the real remote proxy object
    public BarServiceStub(BarService barService){
        this. barService = barService;
    }
 
    public String sayHello(String name) {
        // This code is executed on the client side, you can do ThreadLocal local cache on the client side, or pre-verify whether the parameters are legal, etc.
        try {
            return barService.sayHello(name);
        } catch (Exception e) {
            // You are fault tolerant and can do any AOP interception
            return "fault tolerance data";
        }
    }
}