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法律研究Node.js - process.disconnect() 方法
當一個 Node.js 程序是透過 IPC 頻道衍生的，process.disconnect() 方法將關閉該 IPC 頻道到父程序，允許子程序正常退出或結束。一旦沒有其他連線使該程序保持活動狀態，該程序將退出。
語法
process.disconnect()
示例 1
建立兩個名為 "parent.js" 和 "child.js" 的檔案，並複製以下程式碼段。建立檔案後，使用命令 "node parent.js" 執行 parent.js。
parent.js
// process.channel Property Demo Example
// Importing the child_process modules
const fork = require('child_process').fork;
// Attaching the child process file
const child_file = 'child.js';
// Spawning/calling child process
const child = fork(child_file);child.js
console.log('In Child Process')
// Checking if channel is available
if (process.connected) {
// Check if its connected or not
if (process.connected == true) {
console.log("Child is connected.");
}
// Use process.disconnect() to disconnect with child
process.disconnect();
// Check if its connected or not
if (process.connected == false) {
console.log("Child is now disconnected.");
}
}輸出
C:\home
ode>> node parent.js In Child Process Child is connected. Child is now disconnected.
示例 2
我們再看一個示例。
parent.js
// process.channel Property Demo Example
// Importing the child_process modules
const fork = require('child_process').fork;
// Attaching the child process file
const child_file = 'child.js';
// Spawning/calling child process
const child = fork(child_file);child.js
console.log('In Child Process')
// Checking if channel is available
if (process.connected) {
// Send multiple messages
setTimeout((function () {
if (process.connected == true) {
console.log("Process Running for: 1 second.");
}
}), 1000);
// Disconnect from channel after 2 seconds
setTimeout((function () {
if (process.connected == true) {
console.log("Process Running for: 2 seconds.");
}
}), 2000);
// Disconnect from channel after 2.5 seconds
setTimeout((function () {
process.disconnect();
}), 2500);
// Disconnect from channel after 3 seconds
setTimeout((function () {
if (process.connected == true) {
console.log("Process Running for: 3 seconds.");
}
}), 3000);
}輸出
C:\home
ode>> node parent.js In Child Process Process Running for: 1 second. Process Running for: 2 seconds.
更新於: 17-Jan-2022
578 次瀏覽
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