启动流程

// 启动服务
php think swoole start

think - 入口

• 引入自动加载
• 应用初始化
  • 实例化App，并获取Console组件
    • 实例化Console，调用$this->app->initialize();初始化注册了指令，注册了 think\swoole\service
      • 获取默认输入定义
      • 加载指令
      • 执行启动器（回调预处理）
  • 调用Console->run
    • 获取命令 php think swoole start
      • 进入命令处理think\swoole\command\Server

注册服务

• App->initialize()
• RegisterService->init() 注册系统服务vendor/services.php
• think\swoole\Service->register() 创建Swoole服务器并绑定

在 App->initialize 初始化时注册了Error::class、RegisterService::class、BootService::class，主要是在注册系统服务RegisterService::class时加载了外部服务

    /**
     * 应用初始化器
     * @var array
     */
    protected $initializers = [
        Error::class,
        RegisterService::class,
        BootService::class,
    ];

   /**
     * 初始化应用
     * @access public
     * @return $this
     */
    public function initialize()
    {
        ...
        // 循环执行应用初始化器的 init 方法
        foreach ($this->initializers as $initializer) {
            $this->make($initializer)->init($this);
        }
        ...
    }

在注册系统服务时think\initializer\RegisterService加载了vendor/services.php服务列表

vendor/services.php 该文件是由composer钩子生成的

<?php 
// This file is automatically generated at:2019-11-27 10:20:37
declare (strict_types = 1);
return array (
  0 => 'think\\migration\\Service',
  1 => 'think\\swoole\\Service',
  2 => 'think\\trace\\Service',
);

    // think\swoole\Service
    public function register()
    {
        $this->isWebsocket = $this->app->config->get('swoole.websocket.enable', false);

        $this->app->bind(Server::class, function () {
            if (is_null(static::$server)) {
                $this->createSwooleServer();
            }

            return static::$server;
        });

        $this->app->bind("swoole.server", Server::class);

        $this->app->bind(PidManager::class, function () {
            return new PidManager($this->app->config->get("swoole.server.options.pid_file"));
        });
    }

配置

<?php

use think\swoole\websocket\socketio\Handler;
use think\swoole\websocket\socketio\Parser;

return [
    'server'     => [
        'host'      => env('SWOOLE_HOST', '127.0.0.1'), // 监听地址
        'port'      => env('SWOOLE_PORT', 80), // 监听端口
        'mode'      => SWOOLE_PROCESS, // 运行模式 默认为SWOOLE_PROCESS
        'sock_type' => SWOOLE_SOCK_TCP, // sock type 默认为SWOOLE_SOCK_TCP
        'options'   => [
            'pid_file'              => runtime_path() . 'swoole.pid',
            'log_file'              => runtime_path() . 'swoole.log',
            'daemonize'             => false,
            // Normally this value should be 1~4 times larger according to your cpu cores.
            'reactor_num'           => swoole_cpu_num(),
            'worker_num'            => swoole_cpu_num(),
            'task_worker_num'       => swoole_cpu_num(),
            'task_enable_coroutine' => true,
            'task_max_request'      => 3000,
            'enable_static_handler' => true,
            'document_root'         => root_path('public'),
            'package_max_length'    => 20 * 1024 * 1024,
            'buffer_output_size'    => 10 * 1024 * 1024,
            'socket_buffer_size'    => 128 * 1024 * 1024,
            'max_request'           => 3000,
            'send_yield'            => true,
        ],
    ],
    'websocket'  => [
        'enable'        => false,
        'handler'       => Handler::class,
        'parser'        => Parser::class,
        'ping_interval' => 25000,
        'ping_timeout'  => 60000,
        'room'          => [
            'type'  => 'table',
            'table' => [
                'room_rows'   => 4096,
                'room_size'   => 2048,
                'client_rows' => 8192,
                'client_size' => 2048,
            ],
            'redis' => [

            ],
        ],
        'listen'        => [],
        'subscribe'     => [],
    ],
    'rpc'        => [
        'server' => [
            'enable'   => false,
            'port'     => 9000,
            'services' => [
            ],
        ],
        'client' => [
        ],
    ],
    'hot_update' => [
        'enable'  => env('APP_DEBUG', false),
        'name'    => ['*.php'],
        'include' => [app_path()],
        'exclude' => [],
    ],
    //连接池
    'pool'       => [
        'db'    => [
            'enable'        => true,
            'max_active'    => 100,
            'max_wait_time' => 5,
        ],
        'cache' => [
            'enable'        => true,
            'max_active'    => 50,
            'max_wait_time' => 5,
        ],
    ],
    'coroutine'  => [
        'enable' => true,
        'flags'  => SWOOLE_HOOK_ALL,
    ],
    'tables'     => [],
    //每个worker里需要预加载以共用的实例
    'concretes'  => [],
    //重置器
    'resetters'  => [],
    //每次请求前需要清空的实例
    'instances'  => [],
    //每次请求前需要重新执行的服务
    'services'   => [],
];

Http请求

在InteractsWithHttp->OnRequest事件中触发

    /**
     * "onRequest" listener.
     *
     * @param Request  $req
     * @param Response $res
     */
    public function onRequest($req, $res)
    {
        $args = func_get_args();
        $this->runInSandbox(function (Http $http, Event $event, App $app) use ($args, $req, $res) {
            $event->trigger('swoole.request', $args);

            $request = $this->prepareRequest($req);
            try {
                $response = $this->handleRequest($http, $request);
            } catch (Throwable $e) {
                $response = $this->app
                    ->make(Handle::class)
                    ->render($request, $e);
            }

            $this->sendResponse($res, $response, $app->cookie);
        });
    }

    /**
     * 在沙箱中执行
     * @param Closure $callable
     * @param null    $fd
     * @param bool    $persistent
     */
    protected function runInSandbox(Closure $callable, $fd = null, $persistent = false)
    {
        /** @var Sandbox $sandbox */
        $sandbox = $this->app->make(Sandbox::class);

        $sandbox->run($callable, $fd, $persistent);
    }

runInSandbox

连接池

在InteractsWithServer->onWorkerStart()事件中开启了协程，调用了prepareApplication，对db、cache进行重新绑定，替换为连接池实例
InteractsWithServer->prepareApplication()，重新绑定了

沙盒

隔离不同协程的上下文

InteractsWithHttp

RPC