使用dubbo调取服务失败时，想用Mock="true"实现当服务异常时，使用本地实现类做补偿该如何配置？

Question

本人刚接触dubbo，想针对dubbo调取服务因网络等故障失败时这一异常做相应的补偿机制------用本地接口实现类代替远程接口实现类，在网上看到有用mock=“ture”的配置实现，尝试了一通，但是失败了，报如下错误：

java.lang.IllegalStateException: Failed to check the status of the service com.dcits.jk.TJCount. No provider available for the service com.dcits.jk.TJCount from the url zookeeper://192.168.1.130:2181/com.alibaba.dubbo.registry.RegistryService?application=consumer&dubbo=2.5.3&interface=com.dcits.jk.TJCount&methods=gettotal&mock=true&pid=10528&side=consumer&timestamp=1513235485333 to the consumer 192.168.1.116 use dubbo version 2.5.3
at com.alibaba.dubbo.config.ReferenceConfig.createProxy(ReferenceConfig.java:420) ~[dubbo-2.5.3.jar:2.5.3]
at com.alibaba.dubbo.config.ReferenceConfig.init(ReferenceConfig.java:300) ~[dubbo-2.5.3.jar:2.5.3]
at com.alibaba.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:138) ~[dubbo-2.5.3.jar:2.5.3]

我的服务接口如下：

public interface TJCount {
    public int gettotal() throws InterruptedException;
}
当服务调取失败时，本地接口实现类如下：
public class TJCountMock implements TJCount {
    public TJCountMock(){
    }
    public int gettotal() throws InterruptedException{
        return 10;
    }
}

消费者接口配置如下：

<dubbo:reference id="tjcount" interface="com.dcits.jk.TJCount" mock="true"/>

请各位赐教。。

Answer 1

试试 <dubbo:reference id="tjcount" interface="com.dcits.jk.TJCount" mock="com.foo.bar.TJCountMock"/>