Dubbo事件通知

dubbo在调用之前，之后，出现异常时，会触发oninvoke,onreturn,onthrow三个事件，可配置当事件发生时，通知那个类的那个方法。
如以下实现：
服务提供者：

package com.yncp.dubbo.entity;

import java.io.Serializable;

public class Computer implements Serializable{

    private static final long serialVersionUID = 1L;
    private Integer id;
    private String name;
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }

}   

package com.yncp.dubbo.entity;

import java.io.Serializable;

public class User implements Serializable { 
    private static final long serialVersionUID = 1L;
    private Integer id;
    private String name;
    private Computer computer;
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public Computer getComputer() {
        return computer;
    }
    public void setComputer(Computer computer) {
        this.computer = computer;
    }

}

package com.yncp.dubbo.service;

import com.yncp.dubbo.entity.User;

public interface IDubboEvenService {

    public User methodInvoke(Integer id,String value);
}

package com.yncp.dubbo.service.impl;

import com.yncp.dubbo.entity.User;
import com.yncp.dubbo.service.IDubboEvenService;

public class DubboEvenServiceImpl implements IDubboEvenService {
    public User methodInvoke(Integer id,String name) { 
        User user=new User();
        user.setId(id);
        user.setName(name);
        System.out.println("抛出异常");
        if(id<0) throw new RuntimeException("用户参数不合法");
        return user;
    }

}

服务消费者：

package com.yncp.dubbo.entity;

import java.io.Serializable;

public class Computer implements Serializable{
    private static final long serialVersionUID = 1L;
    private Integer id;
    private String name;
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }

}   

package com.yncp.dubbo.entity;

import java.io.Serializable;

public class User implements Serializable {
    private static final long serialVersionUID = 1L;
    private Integer id;
    private String name;
    private Computer computer;
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public Computer getComputer() {
        return computer;
    }
    public void setComputer(Computer computer) {
        this.computer = computer;
    }

}

package com.yncp.dubbo.service;

import com.yncp.dubbo.entity.User;

public interface IDubboEvenService {

    public User methodInvoke(Integer id,String value);

}

package com.yncp.dubbo.service;

public interface INotify {
    public void onreturn(Object res,Object... args);
    public void onthrow(Throwable ex,Object... args);
}

package com.yncp.dubbo.service.impl;

import com.yncp.dubbo.service.INotify;

public class Notify implements INotify {

    public void onreturn(Object res, Object... args) {
        System.out.println("返回值："+res);
        for (Object object : args) {
            System.out.println("参数："+object);
        }
    }

    public void onthrow(Throwable ex, Object... args) {
        System.out.println("异常："+ex.getMessage());
        for (Object object : args) {
            System.out.println("异常参数："+object);
        }
    }


}

applicationcontext.xml配置：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
    xsi:schemaLocation="http://www.springframework.org/schema/beans        http://www.springframework.org/schema/beans/spring-beans.xsd        http://code.alibabatech.com/schema/dubbo        http://code.alibabatech.com/schema/dubbo/dubbo.xsd">

    <!-- 引入配置文件 -->
    <bean id="notify" class="com.yncp.dubbo.service.impl.Notify"></bean>
    <import resource="classpath:dubbo.xml"/>
 </beans>
```.
dubbo.xml配置





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这里写代码片
“`

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
    xsi:schemaLocation="http://www.springframework.org/schema/beans        
    http://www.springframework.org/schema/beans/spring-beans.xsd        
    http://code.alibabatech.com/schema/dubbo        
    http://code.alibabatech.com/schema/dubbo/dubbo.xsd">

    <!-- 指定web服务名字 -->
    <dubbo:application name="DubboEven_ref"/>
    <!-- 声明服务注册中心 -->
    <dubbo:registry protocol="zookeeper" address="127.0.0.1:2181"/>
    <dubbo:protocol name="dubbo" port="20881"/>
    <!-- 暴露你的服务地址 -->
    <dubbo:reference
        id="dubboEvenService" 
        interface="com.yncp.dubbo.service.IDubboEvenService"
        protocol="dubbo"
     >
        <dubbo:method name="methodInvoke" 
          onreturn="notify.onreturn"
          onthrow="notify.onthrow"
         />
     </dubbo:reference>

 </beans>
```.
测试：





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这里写代码片
“`

import java.io.IOException;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.yncp.dubbo.entity.User;
import com.yncp.dubbo.service.IDubboEvenService;


public class DubboStart {
    public static void main(String[] args) throws IOException {
        ApplicationContext ctx=new ClassPathXmlApplicationContext("applicationContext.xml");
        IDubboEvenService dubboEvenService=(IDubboEvenService) ctx.getBean("dubboEvenService");
        try {
            User user = dubboEvenService.methodInvoke(1, "jiangzz");
            System.out.println(user.getName()+"  "+user.getId());
        } catch (Exception e) { 
        }

    }
}