hyperf 自己定义进程实现原理。

所有的进程必须实现 \Hyperf\Contract\ProcessInterface 接口
Hyperf 提供了 \Hyperf\Process\AbstractProcess 抽象实现类

<?php

declare(strict_types=1);
/**
 * This file is part of Hyperf.
 *
 * @link     https://www.hyperf.io
 * @document https://hyperf.wiki
 * @contact  [email protected]
 * @license  https://github.com/hyperf/hyperf/blob/master/LICENSE
 */
namespace Hyperf\Contract;

use Swoole\Coroutine\Http\Server as CoHttpServer;
use Swoole\Coroutine\Server as CoServer;
use Swoole\Server;

interface ProcessInterface
{
    /**
     * Create the process object according to process number and bind to server.
     * @param CoHttpServer|CoServer|Server $server
     */
    public function bind($server): void;

    /**
     * Determine if the process should start ?
     * @param CoServer|Server $server
     */
    public function isEnable($server): bool;

    /**
     * The logical of process will place in here.
     */
    public function handle(): void;
}

实际把进程添加到Swoole Service的代码在 \Hyperf\Process\Listener\BootProcessListener::process 通过事件-监听模式触发。

   /**
     * Handle the Event when the event is triggered, all listeners will
     * complete before the event is returned to the EventDispatcher.
     */
    public function process(object $event)
    {
        /** @var BeforeMainServerStart $event */
        $server = $event->server;
        $serverConfig = $event->serverConfig;

        $serverProcesses = $serverConfig['processes'] ?? [];
        $processes = $this->config->get('processes', []);
        $annotationProcesses = $this->getAnnotationProcesses();

        // Retrieve the processes have been registered.
        $processes = array_merge($serverProcesses, $processes, ProcessManager::all(), array_keys($annotationProcesses));
        foreach ($processes as $process) {
            if (is_string($process)) {
                $instance = $this->container->get($process);
                if (isset($annotationProcesses[$process])) {
                    foreach ($annotationProcesses[$process] as $property => $value) {
                        if (property_exists($instance, $property) && ! is_null($value)) {
                            $instance->{$property} = $value;
                        }
                    }
                }
            } else {
                $instance = $process;
            }
            if ($instance instanceof ProcessInterface) {
                $instance->isEnable($server) && $instance->bind($server);
            }
        }
    }