网络编程 发布日期:2025/10/31 浏览次数:1
1.package.json中
"dependencies": {
   ...
  "vertx3-eventbus-client": "3.5.2",
 },
然后 npm install,或者:
npm install vertx3-eventbus-client@3.5.2
2.angular-cli.json中
 "scripts": [
     ...
    "../node_modules/vertx3-eventbus-client/vertx-eventbus.js"
   ],
3.创建一个eventbus.service.ts用来通信
导入eventbus:
import { EventBus } from 'vertx3-eventbus-client';
声明eventbus:
declare var EventBus: any;
4.创建eventbus实例,监听接口以及发送消息
//创建实例
var eb = new EventBus('http://localhost:8080/eventbus');
eb.onopen = function() {
 //注册监听器用来接受消息
 eb.registerHandler('some-address', function(error, message) {
  console.log('received a message: ' + JSON.stringify(message));
 });
 //发送消息
 eb.send('some-address', {name: 'tim', age: 587});
}
更多信息请参考这里 https://vertx.io/docs/vertx-web/java/
注:
对于需要发送消息来接受的消息,需要先监听,然后再发送消息。
对于一直推送的消息,不需要发送。
代码实例如下:
RegisterHandler(key, id, callback) {
    const address = '***.' + key + '.' + id;
    if (typeof (this.eventBus[key]) === 'undefined' || !this.eventBus[key]) {
      this.eventBus[key] = new EventBus(environment.eventbusUrl);
    }
    if (this.eventBus[key].state === EventBus.OPEN) {
      this.eventBus[key].registerHandler(address, callback);
    } else {
      const $this = this;
      this.eventBus[key].onopen = function () {
        $this.eventBus[key].registerHandler(address, callback)
      }
    }
  }
Send(key, id) {
    var data = '';
    const address = ***.' + key + '.' + id;
    if (typeof (this.eventBus[key]) === 'undefined' || !this.eventBus[key]) {
      this.eventBus[key] = new EventBus(environment.eventbusUrl);
    }
    if (this.eventBus[key].state === EventBus.OPEN) {
      this.eventBus[key].send(address, data)
    } else {
      const $this = this;
      this.eventBus[key].onopen = function () {
        $this.eventBus[key].send(address, data)
      }
    }
  }
closeEventBus(key) {
    if (typeof (this.eventBus[key]) !== 'undefined' && this.eventBus[key] && this.eventBus[key].state === EventBus.OPEN) {
      this.eventBus[key].close();
    }
    this.eventBus[key] = null;
}
在组件ngOnDestroy中调用closeEventBus关闭eventbus。
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。