How to use the Hyperf framework for graceful shutdown

How to use the Hyperf framework for graceful shutdown

When developing web applications, it is often necessary to perform graceful shutdown operations to ensure that ongoing processes are not affected during the shutdown process. Handled request. The Hyperf framework provides a graceful shutdown mechanism that allows us to shut down the server smoothly while ensuring that all requests being processed can be processed normally.

The Hyperf framework uses the Swoole extension as its server, and Swoole provides many graceful shutdown features. The following will introduce how to use the Hyperf framework for graceful shutdown, as well as some sample code to demonstrate.

1. Set signal handler

First, we need to set up a signal handler when the application starts so that we can handle it accordingly when we receive the shutdown signal. . In the entry file of the Hyperf framework, it is usually set in the hyperf.php file.

<?php
// 在 hyperf.php 中设置信号处理器
pcntl_signal(SIGTERM, function () {
    swoole_event_exit();
});

Here we set up a SIGTERM signal processor. When the signal is received, the swoole_event_exit() function is called to exit the Swoole event loop.

2. Enable coroutine timer

During the graceful shutdown process, we also need to enable the timer to regularly check whether all requests have been processed. If they have been processed, , you can exit normally. The Hyperf framework provides the go(function () {}) method to create a coroutine timer.

<?php
// 在 hyperf.php 中启用协程定时器
use SwooleCoroutine;

go(function () {
    while (true) {
        Coroutine::sleep(1);
        if (isAllRequestsHandled()) {
            break;
        }
    }
    swoole_event_exit();
});

The isAllRequestsHandled() function is used here to check whether all requests have been processed. If so, jump out of the loop and call the swoole_event_exit() function to exit Swoole event loop.

3. Start the server

Finally, we need to start the server in the application and listen to the specified port. In the Hyperf framework, server-related settings are mainly configured through the config/server.php file.

<?php
// 通过 config/server.php 配置服务器
return [
    'servers' => [
        [
            'name' => 'http',
            'type' => Server::SERVER_HTTP,
            'host' => '0.0.0.0',
            'port' => 9501,
        ],
    ],
];

In the above configuration file, we specified an HTTP server listening on the 9501 port of 0.0.0.0.

4. Run the application

Finally, we can run the Hyperf framework application through the command line.

php bin/hyperf.php start

The above command will start the Hyperf framework application and start listening on the specified port. When a shutdown signal is received, the application will perform a graceful shutdown operation.

Summary

Graceful shutdown is one of the very common requirements in web application development. A good shutdown mechanism can ensure the reliability and stability of the service. In the Hyperf framework, we can achieve graceful shutdown operations by setting signal processors, enabling coroutine timers, and configuring servers appropriately.

The above are the general steps and sample code for graceful shutdown using the Hyperf framework. I hope this article can help you understand how to achieve graceful shutdown in the Hyperf framework. thanks for reading!

The above is the detailed content of How to use the Hyperf framework for graceful shutdown. For more information, please follow other related articles on the PHP Chinese website!