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Wie wird der Laravel-Cache aufgerufen?

藏色散人
藏色散人nach vorne
2021-05-08 11:45:142149Durchsuche

In der folgenden Tutorial-Kolumne von laravel erfahren Sie, wie Sie Laravel Cache Get aufrufen. Ich hoffe, dass es Freunden in Not hilfreich sein wird!

Die in diesem Artikel verwendete Version ist Laravel5.5 dieses Mapping gemacht?

public/index.php

public function cache()
    {
        $c=\Cache::get('app');
        if(!$c) {
            \Cache::put('app', 'cache', 1);
        }
        dump($c);//cache
    }

bootstarp/app.php

 'aliases' => [

        'App' => Illuminate\Support\Facades\App::class,
        'Artisan' => Illuminate\Support\Facades\Artisan::class,
        'Auth' => Illuminate\Support\Facades\Auth::class,
        'Blade' => Illuminate\Support\Facades\Blade::class,
        'Broadcast' => Illuminate\Support\Facades\Broadcast::class,
        'Bus' => Illuminate\Support\Facades\Bus::class,
        'Cache' => Illuminate\Support\Facades\Cache::class,
        
        ]

app/http/kernel.phpIlluminateSupportFacadesCache

$response = $kernel->handle(
$request = Illuminate\Http\Request::capture()
);
Illuminate/Foundation/Http/Kernel.php

$app->singleton(
    Illuminate\Contracts\Http\Kernel::class,
    App\Http\Kernel::class
);

Illuminate/Foundation/Application.php

use Illuminate\Foundation\Http\Kernel as HttpKernel;

class Kernel extends HttpKernel
{

}

Illuminate/Foundation/Bootstrap/RegisterFacades.php

public function handle($request)
{
    try {
        $request->enableHttpMethodParameterOverride();
        $response = $this->sendRequestThroughRouter($request);
    } catch (Exception $e) {
        $this->reportException($e);

        $response = $this->renderException($request, $e);
    } catch (Throwable $e) {
        $this->reportException($e = new FatalThrowableError($e));

        $response = $this->renderException($request, $e);
    }

    $this->app['events']->dispatch(
        new Events\RequestHandled($request, $response)
    );

    return $response;
}
protected function sendRequestThroughRouter($request)
    {
        $this->app->instance('request', $request);

        Facade::clearResolvedInstance('request');

        $this->bootstrap();

        return (new Pipeline($this->app))
                    ->send($request)
                    ->through($this->app->shouldSkipMiddleware() ? [] : $this->middleware)
                    ->then($this->dispatchToRouter());
    }
    public function bootstrap()
    {
        if (! $this->app->hasBeenBootstrapped()) {
            $this->app->bootstrapWith($this->bootstrappers());
        }
    }

Illuminate/Foundation/AliasLoader.php

public function bootstrapWith(array $bootstrappers)
    {
        $this->hasBeenBootstrapped = true;

        foreach ($bootstrappers as $bootstrapper) {
            $this['events']->fire('bootstrapping: '.$bootstrapper, [$this]);

            $this->make($bootstrapper)->bootstrap($this);

            $this['events']->fire('bootstrapped: '.$bootstrapper, [$this]);
        }
    }

Illuminate/Support/Facades/Cache.php

public function bootstrap(Application $app)
    {
        Facade::clearResolvedInstances();

        Facade::setFacadeApplication($app);
//将config/app.php 里的aliases数组里面的Facades类设置别名
        AliasLoader::getInstance(array_merge(
            $app->make('config')->get('app.aliases', []),
            $app->make(PackageManifest::class)->aliases()
        ))->register();
    }

Illuminate/Support/Facades/Facade.php

Diese Datei ist nicht vorhanden a get set , nur das Prinzip und die Code-Analyse von Facades in __callStatic

public function load($alias)
    {
        if (static::$facadeNamespace && strpos($alias, static::$facadeNamespace) === 0) {
            $this->loadFacade($alias);

            return true;
        }

      // $alias来自于config/app.php中aliases数组 
        if (isset($this->aliases[$alias])) {
            //'Route' => Illuminate\Support\Facades\Route::class,
            // class_alias 为一个类创建别名
            return class_alias($this->aliases[$alias], $alias);
        }
    }

IlluminateContainerContainer.php

class Cache extends Facade
{
    /**
     * Get the registered name of the component.
     *
     * @return string
     */
    protected static function getFacadeAccessor()
    {
        return 'cache';
    }
}

Illuminate/Cache/CacheServiceProvider.php

public static function __callStatic($method, $args)
    {
        $instance = static::getFacadeRoot();

        if (! $instance) {
            throw new RuntimeException('A facade root has not been set.');
        }

        return $instance->$method(...$args);
    }
   public static function getFacadeRoot()
    {
        return static::resolveFacadeInstance(static::getFacadeAccessor());
    } 
     protected static function resolveFacadeInstance($name)
    {
    //这里$name为cache
        if (is_object($name)) {
            return $name;
        }

        if (isset(static::$resolvedInstance[$name])) {
            return static::$resolvedInstance[$name];
        }
    //$app是容器对象,实现了ArrayAccess接口,最终调用的还是容器的make方法
        return static::$resolvedInstance[$name] = static::$app[$name];
    }

get set

public function make($abstract, array $parameters = [])
    {
        return $this->resolve($abstract, $parameters);
    }
    protected function resolve($abstract, $parameters = [])
    {
        $abstract = $this->getAlias($abstract);

        $needsContextualBuild = ! empty($parameters) || ! is_null(
            $this->getContextualConcrete($abstract)
        );

        // If an instance of the type is currently being managed as a singleton we'll
        // just return an existing instance instead of instantiating new instances
        // so the developer can keep using the same objects instance every time.
        if (isset($this->instances[$abstract]) && ! $needsContextualBuild) {
            return $this->instances[$abstract];
        }

        $this->with[] = $parameters;

        $concrete = $this->getConcrete($abstract);

        // We're ready to instantiate an instance of the concrete type registered for
        // the binding. This will instantiate the types, as well as resolve any of
        // its "nested" dependencies recursively until all have gotten resolved.
        if ($this->isBuildable($concrete, $abstract)) {
            $object = $this->build($concrete);
        } else {
            $object = $this->make($concrete);
        }

        // If we defined any extenders for this type, we'll need to spin through them
        // and apply them to the object being built. This allows for the extension
        // of services, such as changing configuration or decorating the object.
        foreach ($this->getExtenders($abstract) as $extender) {
            $object = $extender($object, $this);
        }

        // If the requested type is registered as a singleton we'll want to cache off
        // the instances in "memory" so we can return it later without creating an
        // entirely new instance of an object on each subsequent request for it.
        if ($this->isShared($abstract) && ! $needsContextualBuild) {
            $this->instances[$abstract] = $object;
        }

        $this->fireResolvingCallbacks($abstract, $object);

        // Before returning, we will also set the resolved flag to "true" and pop off
        // the parameter overrides for this build. After those two things are done
        // we will be ready to return back the fully constructed class instance.
        $this->resolved[$abstract] = true;

        array_pop($this->with);

        return $object;
    }
laravel.

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