angular2中 使用mqtt

import { Component,OnInit } from'@angular/core';

import { Paho }from 'ng2-mqtt';

@Component({

    selector: 'app-root',

    templateUrl: './app.component.html',

    styleUrls: ['./app.component.css']

})

export classAppComponent implementsOnInit {

    constructor() { }

    private _client:Paho.MQTT.Client;

    ngOnInit() {

        //创建客户端实例

        this._client =new Paho.MQTT.Client("114.215.30.117",8083, "xixi");

        //mqtt断开时触发

        this._client.onConnectionLost = (responseObject:Object) => {

            console.log('Connection lost.');

        };

        //mqtt收到消息时触发

        this._client.onMessageArrived = (message:Paho.MQTT.Message)=> {

            console.log(message.payloadString);

            console.log('Message arrived.');

        };

        //当连接成功调用

        this._client.connect({onSuccess: this.onConnected.bind(this) });

    }

    private onConnected():void {

        //订阅主题

        this._client.subscribe('/api/websocket/status', {qos: 1 });

        console.log('Connected to broker.');

    }

//向服务器发送消息

    send() {

        var message =new Paho.MQTT.Message("wangwenpeng");

        message.destinationName ="Hello2";

        this._client.send(message);

    }

}