dubbo telnet使用

紧急情况下可能需要直接手动调用接口，而生产环境只有服务提供者，消费者暂时不方便操作时，可通过telnet进行触发。

举个例子：

	com.alibaba
	fastjson
	1.2.51

package com.alibaba.dubbo.samples.cache.entity;

import java.io.Serializable;
import java.util.List;


public class PersonInfo implements Serializable {


    private static final long serialVersionUID = -7159408033070746291L;

    private String sname;
    private Integer sage;
    private List parents;
    private List areas;

    public String getSname() {
        return sname;
    }

    public void setSname(String sname) {
        this.sname = sname;
    }

    public Integer getSage() {
        return sage;
    }

    public void setSage(Integer sage) {
        this.sage = sage;
    }

    public List getParents() {
        return parents;
    }

    public void setParents(List parents) {
        this.parents = parents;
    }

    public List getAreas() {
        return areas;
    }

    public void setAreas(List areas) {
        this.areas = areas;
    }
}

package com.alibaba.dubbo.samples.cache.api;


import com.alibaba.dubbo.samples.cache.entity.PersonInfo;

public interface StudentService {

    boolean save(PersonInfo personInfo,String operator);

    PersonInfo findByName(String name);
}

package com.alibaba.dubbo.samples.cache.impl;

import com.alibaba.dubbo.samples.cache.api.StudentService;
import com.alibaba.dubbo.samples.cache.entity.PersonInfo;
import com.alibaba.fastjson.JSON;
import com.google.common.collect.Lists;

import java.util.List;


public class StudentServiceImpl implements StudentService {
    @Override
    public boolean save(PersonInfo personInfo, String operator) {
        System.out.println(">>>>>>operator:" + operator);
        System.out.println(">>>>>>personInfo:" + JSON.toJSONString(personInfo));
        return true;
    }

    @Override
    public PersonInfo findByName(String name) {
        PersonInfo c = new PersonInfo();
        c.setSname(name);
        c.setSage(12);
        List parent = Lists.newArrayList();
        PersonInfo father = new PersonInfo();
        father.setSage(40);
        father.setSname(name + "#father");
        parent.add(father);
        c.setParents(parent);

        List areas = Lists.newArrayList("杭州", "上海");
        c.setAreas(areas);
        return c;
    }

//    public static void main(String[] args) { //用以生成json串，需要自行在string串中补充"class"一项
//        PersonInfo c = new PersonInfo();
//        c.setSname("testName123");
//        c.setSage(12);
//        List parent = Lists.newArrayList();
//        PersonInfo father = new PersonInfo();
//        father.setSage(40);
//        father.setSname("testName123#father");
//        PersonInfo mother = new PersonInfo();
//        mother.setSage(33);
//        mother.setSname("testName123#mother");
//        parent.add(father);
//        parent.add(mother);
//        c.setParents(parent);
//
//        List areas = Lists.newArrayList("杭州", "上海");
//        c.setAreas(areas);
//        System.out.println(JSON.toJSONString(c));
//    }
}

然后启动服务。

windows下执行cmd命令: telnet 127.0.0.1 20880

然后是invoke的使用。

像案例中的StudentService #findByName这种简单的。可直接执行 invoke StudentService.findByName("testSname")

如果是复杂对象，比如StudentService#save这种。则需要将入参转换成json串，然后在json串中补上“class”一项，用于InvokeTelnetHandler类进行转换。

本例中json串结果如下（注释处打开执行后补全“class”即可）：

{"class":"com.alibaba.dubbo.samples.cache.entity.PersonInfo","areas":["杭州","上海"],"parents":[{"class":"com.alibaba.dubbo.samples.cache.entity.PersonInfo","sage":40,"sname":"testName123#father"},{"class":"com.alibaba.dubbo.samples.cache.entity.PersonInfo","sage":33,"sname":"testName123#mother"}],"sage":12,"sname":"testName123"}

然后执行命令组装后如下：

invoke StudentService.save({"class":"com.alibaba.dubbo.samples.cache.entity.PersonInfo","areas":["杭州","上海"],"parents":[{"class":"com.alibaba.dubbo.samples.cache.entity.PersonInfo","sage":40,"sname":"testName123#father"},{"class":"com.alibaba.dubbo.samples.cache.entity.PersonInfo","sage":33,"sname":"testName123#mother"}],"sage":12,"sname":"testName123"},"admin")

执行效果如图：

 

官网telnet相关地址：

1、http://dubbo.apache.org/zh-cn/docs/user/references/telnet.html

2、http://dubbo.apache.org/zh-cn/docs/user/references/qos.html