Laravel5.5解析-bootstrap列表-BootProviders_lavaral bootproviders-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_43197466/article/details/106765137

本文深入解析了服务提供者在框架中的注册与启动过程，详细介绍了核心方法boot()的执行流程，包括应用初始化、服务注册、依赖注入及服务启动等关键步骤。

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BootProviders

bootstrap()

	//class BootProviders
	public function bootstrap(Application $app)
    {
        $app->boot();
    }
	//class Application
    public function boot()
    {
		...
		//执行存储在bootingCallbacks的匿名函数，当前bootingCallback为空数组
        $this->fireAppCallbacks($this->bootingCallbacks);//$this->bootingCallbacks = []
		//遍历serviceProviders，并执行bootProvider()
        array_walk($this->serviceProviders, function ($p) {
            $this->bootProvider($p);
        });
		//更新booted属性
        $this->booted = true;
        //执行BootProvider执行过程中添加在bootedCallbacks内的匿名函数
        $this->fireAppCallbacks($this->bootedCallbacks);
    }

$this->bootProvider()

	//class Application 
	protected function bootProvider(ServiceProvider $provider)
    {
        if (method_exists($provider, 'boot')) {
            return $this->call([$provider, 'boot']);
        }
    }

call()

    public function call($callback, array $parameters = [], $defaultMethod = null)
    {
        return BoundMethod::call($this, $callback, $parameters, $defaultMethod);
    }

BoundMethods::call()

	//class BoundMethods
    public static function call($container, $callback, array $parameters = [], $defaultMethod = null)
    {
		...

        return static::callBoundMethod($container, $callback, function () use ($container, $callback, $parameters) {
            return call_user_func_array(
				//static::getMethodDependencies()获取实例依赖参数，BootProvider执行注册服务的boot()方法无需参数，故return []
                $callback, static::getMethodDependencies($container, $callback, $parameters)
            );
        });
    }

BoundMethods::callBoundMethod()

    protected static function callBoundMethod($container, $callback, $default)
    {
		...
		//当前$callback数据类型为数组，分别存储[$object,'function'],normalizeMethod()将其转换为'class@function'字符串
        $method = static::normalizeMethod($callback);
        //当前MethondBindings = [];
        if ($container->hasMethodBinding($method)) {
            return $container->callMethodBinding($method, $callback[0]);
        }
		//执行匿名函数,即执行当前$provider->boot()
        return $default instanceof Closure ? $default() : $default;
    }

总结

服务提供者的注册及启动核心方法是当前服务的boot(),任务量实在太大，慢慢看吧！先看一下我们使用框架中常见的服务列表吧,有时间对感兴趣的看一下吧！

array:20 [▼
  0 => EventServiceProvider {#6 ▶}
  1 => LogServiceProvider {#8 ▶}
  2 => RoutingServiceProvider {#10 ▶}
  3 => AuthServiceProvider {#41 ▶}
  4 => CookieServiceProvider {#37 ▶}
  5 => DatabaseServiceProvider {#51 ▶}
  6 => EncryptionServiceProvider {#58 ▶}
  7 => FilesystemServiceProvider {#60 ▶}
  8 => FormRequestServiceProvider {#66 ▶}
  9 => FoundationServiceProvider {#65 ▶}
  10 => NotificationServiceProvider {#68 ▶}
  11 => PaginationServiceProvider {#70 ▶}
  12 => SessionServiceProvider {#74 ▶}
  13 => ViewServiceProvider {#78 ▶}
  14 => TrustedProxyServiceProvider {#82 ▶}
  15 => ServiceProvider {#83 ▶}
  16 => AppServiceProvider {#84 ▶}
  17 => AuthServiceProvider {#85 ▶}
  18 => EventServiceProvider {#86 ▶}
  19 => RouteServiceProvider {#87 ▶}
]