How to implement distributed task scheduling in the Workerman document

How to implement distributed task scheduling in the Workerman document requires specific code examples

In today's context of big data and cloud computing, the scale and complexity of applications The degree keeps increasing. In order to meet the requirements of high concurrency and high availability, distributed systems have become a trend. As one of the important components of distributed systems, task scheduling is crucial to the stability and performance of the system.

Workerman is a high-performance, asynchronous event-driven network framework developed based on PHP. It provides rich functions and scalability and is very suitable for task scheduling in distributed systems. This article will introduce how to use Workerman to implement distributed task scheduling and provide specific code examples.

1. Build a task scheduler node

In a distributed task scheduling system, there is a scheduler node responsible for allocating and managing tasks. First, we need to create a scheduler node.

<?php
require_once __DIR__ . '/vendor/autoload.php';

use WorkermanWorker;

$worker = new Worker();
$worker->onWorkerStart = function($worker) {
    // 这里进行任务的分发和管理逻辑
};
Worker::runAll();

In the above code, we use Workerman to create a Worker instance and write the task distribution and management logic in its onWorkerStart callback function. The specific logic can be determined according to the needs, such as obtaining tasks from the database or message queue, and then distributing the tasks to the worker nodes.

2. Create working nodes

In a distributed task scheduling system, there are multiple working nodes responsible for executing tasks. We need to create an independent Worker instance for each worker node.

<?php
require_once __DIR__ . '/vendor/autoload.php';

use WorkermanWorker;

$worker = new Worker();
$worker->onWorkerStart = function($worker) {
    // 这里进行任务执行逻辑
};
Worker::runAll();

In the onWorkerStart callback function of the worker node, we can write specific task execution logic. For example, you can call external command line tools to perform tasks, or call other PHP scripts.

3. Connect the task scheduler node and the worker node

Using the TcpConnection class provided by Workerman, we can easily implement communication between nodes. Next, we will connect the task scheduler node and worker nodes.

Scheduler node:

<?php
require_once __DIR__ . '/vendor/autoload.php';

use WorkermanWorker;
use WorkermanConnectionTcpConnection;

$worker = new Worker();
$worker->onWorkerStart = function($worker) {
    $connection = new TcpConnection('127.0.0.1', 9999);
    $connection->onMessage = function($connection, $data) use ($worker) {
        // 收到消息后，分配任务给工作节点
        // 示例：将任务发送给所有的工作节点
        foreach($worker->connections as $conn) {
            $conn->send($data);
        }
    };
};
Worker::runAll();

Worker node:

<?php
require_once __DIR__ . '/vendor/autoload.php';

use WorkermanWorker;
use WorkermanConnectionTcpConnection;

$worker = new Worker();
$worker->onWorkerStart = function($worker) {
    $connection = new TcpConnection('127.0.0.1', 9999);
    $connection->onMessage = function($connection, $data) {
        // 收到任务后，执行任务
        // 示例：执行一个示例任务
        $result = exec($data);
        // 处理任务结果
        // ...
    };
    $connection->send('I am a worker node');
};
Worker::runAll();

In the above code, we create a TcpConnection instance and specify the IP address and port of the connection. Then, we wrote the message processing logic of the scheduler node and worker node respectively in its onMessage callback function. After the scheduler node receives the task, it sends the task to all worker nodes; after the worker node receives the task, it executes the task and processes the task results.

4. Start the task scheduling system

After the code is written, we need to start the task scheduling system. Scheduler nodes and worker nodes can be started through the command line.

Scheduler node:

php dispatcher.php start

Worker node:

php worker.php start

So far, we have successfully implemented a simple distributed task scheduling system. When the scheduler node receives the task, it will distribute the task to all worker nodes for execution. After the worker node completes the task, it can send the task results to the scheduler node for further processing.

This article introduces the basic structure of the distributed task scheduling system based on Workerman. According to actual needs, we can modify and optimize the code accordingly. At the same time, Workerman also provides more functions and extensions, and can be flexibly customized and developed according to specific business and needs.

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