Node.js MessageChannel.close()方法
原文:https://www . geesforgeks . org/node-js-messagechannel-close-method/
MessageChannel.close() 方法是 worker_threads 模块中 Worker 类的内置应用编程接口，用于禁用消息端口的对象以发送进一步的消息。
语法:
const MessageChannel.close()
参数:此方法不接受任何参数。
返回值:此方法不返回值。
示例 1: 文件名:index.js
java 描述语言
// Node.js program to demonstrate the
// MessageChannel.close() method
// Importing worker_thread module
const { MessageChannel, receiveMessageOnPort }
= require('worker_threads');
// Creating and initializing the MessageChannel
const { port1, port2} = new MessageChannel();
// Posting data in port1
port1.postMessage({ hello: 'world1' });
// Posting data in port2
port2.postMessage({ hello: 'world2' });
/// Display the result
console.log("received data in port1 : ");
console.log( receiveMessageOnPort(port1));
console.log("received data in port2 : ");
console.log( receiveMessageOnPort(port2));
// Closing the ports
port1.close();
port2.close();
使用以下命令运行 index.js 文件:
node index.js
输出:
received data in port1 :
{ message: { hello: 'world2' } }
received data in port2 :
{ message: { hello: 'world1' } }
示例 2: 文件名:index.js
java 描述语言
// Node.js program to demonstrate the
// MessageChannel.close() Method
// Importing worker_thread module
const { MessageChannel, receiveMessageOnPort }
= require('worker_threads');
// Creating and initializing the MessageChannel
const { port1, port2} = new MessageChannel();
// Catching the event message
port2.on('message', (message) => console.log(message));
// Catching the event close
port2.on('close', () => console.log('closed!'));
// Sending message to port2
port1.postMessage('GFG');
// Closing port by using close() method
port1.close();
使用以下命令运行 index.js 文件:
node index.js
输出:
GFG
closed!
版权属于：月萌API www.moonapi.com，转载请注明出处
