HTTP Kernel 服务提供者的注册和启动

注册

Illuminate\Foundation\Bootstrap\RegisterProviders;

// 调用 application 类的 registerConfiguredProviders 方法
public function bootstrap(Application $app)
{
    $app->registerConfiguredProviders();
}
....
....
** Illuminate\Foundation\Application;
public function registerConfiguredProviders()
{
   $providers = $this['config']->get('app.providers');
    (new ProviderRepository($this, new Filesystem, $this->getCachedServicesPath()))->load($providers);
}

Filesystem 类

该类主要是负责生产缓存文件，有关文件操作的方法都在这个类中

ProviderRepository 类

load 方法

public function load(array $providers)
{
    // 加载缓存文件 @bootstrap/cache/services.php
    $manifest = $this->loadManifest();
    // 通过 $providers 判断是否需要重新生成缓存文件
    if ($this->shouldRecompile($manifest, $providers)) {
        $manifest = $this->compileManifest($providers);
    }
    // 处理条件加载问题，本质上是通过事件来处理的
    foreach ($manifest['when'] as $provider => $events) {
        $this->registerLoadEvents($provider, $events);
    }
    // 注册服务提供者，这类服务提供者每次请求都会进行注册
    foreach ($manifest['eager'] as $provider) {
        $this->app->register($provider);
    }
     // 延迟加载
    $this->app->addDeferredServices($manifest['deferred']);
}

manifest 数据格式

启动

** Illuminate\Foundation\Application;

public function boot()
{
    if ($this->isBooted()) {
        return;
    }
    // 调用注册的回调函数
    $this->fireAppCallbacks($this->bootingCallbacks);
    array_walk($this->serviceProviders, function ($p) {
        $this->bootProvider($p);
    });
    $this->booted = true;
    $this->fireAppCallbacks($this->bootedCallbacks);
}