Nodejs事件多次触发

Nodejs events firing multiple times

本文关键字：事件 Nodejs      更新时间：2023-09-26

如果server01收到消息，则会触发server01和server02的消息事件。我以为线路

Socket.prototype = new events.EventEmitter;

将导致完全分离的事件实例

谢谢你的帮助！

var events = require('events');
var uuid = require('uuid');
// Server class
function Socket (host) {
  var self = this;
  self.options = {
    "serverHost": host,
    "serverName": "server",
    "clientName": uuid.v4()
  };
  self.socket = new require('zmq').socket('router');
  self.socket.identity = self.options.clientName;
  self.socket.connect('tcp://' + self.options.serverHost);
  self.socket.on('message', function (sender, data) {
    console.log('Sender: %s', self.options.clientName);
    console.log('Data: %s', data.toString());
    self.emit('message', sender, data);
  });
  setInterval(function () {
    self.socket.send([self.options.serverName, uuid.v4()]);
  }, 5000);
  self.send = function (obj, callback) {
    var status = true;
    if(obj !== 'object') {
      status = false;
    } else {
      self.socket.send([self.options.serverName, obj]);
    }
    if(callback === 'function') {
  callback(status);
    } else {
      return status;
    };
  };
};
Socket.prototype = new events.EventEmitter;
// Userland
var server01 = new Socket('127.0.0.1:3000');
server01.on('message', function (sender, data) {
  console.log('Server01: %s', data.toString());
});
var server02 = new Socket('127.0.0.1:3000');
server02.on('message', function (sender, data) {
  console.log('Server02: %s', data.toString());
});

下面是这个脚本的输出示例

Sender: 14d36a66-a4e7-484a-9ce0-3f0d368a6986
Data: 03e6bb47-6af0-4700-9b95-7bbc310477f6
Server01: 03e6bb47-6af0-4700-9b95-7bbc310477f6
Server02: 03e6bb47-6af0-4700-9b95-7bbc310477f6
Sender: 59ec292e-abd2-4c9f-ac3e-2bf92c656fde
Data: d66cd320-c3f2-4842-b66b-1d89f656d32f
Server01: d66cd320-c3f2-4842-b66b-1d89f656d32f
Server02: d66cd320-c3f2-4842-b66b-1d89f656d32f

问题在于管理继承的方式。用于继承的正确JavaScript代码是：

Socket.prototype = Object.create(EventEmitter.prototype);
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