PHP Cache::fetch方法代码示例

 public function getAllProjects()
 {
     $key = "{$this->cachePrefix}-all-projects";
     if ($this->cache && ($projects = $this->cache->fetch($key))) {
         return $projects;
     }
     $first = json_decode($this->client->get('projects.json', ['query' => ['limit' => 100]])->getBody(), true);
     $projects = $first['projects'];
     if ($first['total_count'] > 100) {
         $requests = [];
         for ($i = 100; $i < $first['total_count']; $i += 100) {
             $requests[] = $this->client->getAsync('projects.json', ['query' => ['limit' => 100, 'offset' => $i]]);
         }
         /** @var Response[] $responses */
         $responses = Promise\unwrap($requests);
         $responseProjects = array_map(function (Response $response) {
             return json_decode($response->getBody(), true)['projects'];
         }, $responses);
         $responseProjects[] = $projects;
         $projects = call_user_func_array('array_merge', $responseProjects);
     }
     usort($projects, function ($projectA, $projectB) {
         return strcasecmp($projectA['name'], $projectB['name']);
     });
     $this->cache && $this->cache->save($key, $projects);
     return $projects;
 }

 /**
  * {@inheritdoc}
  */
 public function load()
 {
     $contents = $this->doctrine->fetch($this->key);
     if ($contents !== false) {
         $this->setFromStorage($contents);
     }
 }

 /**
  * @param int $start
  * @param int $maxResults
  * @return Category[]|null
  * @throws RepositoryException
  */
 public function findAll($start = 0, $maxResults = 100)
 {
     $cacheKey = self::CACHE_NAMESPACE . sha1($start . $maxResults);
     if ($this->isCacheEnabled()) {
         if ($this->cache->contains($cacheKey)) {
             return $this->cache->fetch($cacheKey);
         }
     }
     $compiledUrl = $this->baseUrl . "?start_element={$start}&num_elements={$maxResults}";
     $response = $this->client->request('GET', $compiledUrl);
     $repositoryResponse = RepositoryResponse::fromResponse($response);
     if (!$repositoryResponse->isSuccessful()) {
         throw RepositoryException::failed($repositoryResponse);
     }
     $stream = $response->getBody();
     $responseContent = json_decode($stream->getContents(), true);
     $stream->rewind();
     $result = [];
     if (!$responseContent['response']['content_categories']) {
         $responseContent['response']['content_categories'] = [];
     }
     foreach ($responseContent['response']['content_categories'] as $segmentArray) {
         $result[] = Category::fromArray($segmentArray);
     }
     if ($this->isCacheEnabled()) {
         $this->cache->save($cacheKey, $result, self::CACHE_EXPIRATION);
     }
     return $result;
 }

 protected function fetchCached(\Money\Currency $from, \Money\Currency $to)
 {
     if ($this->cache) {
         $cacheKey = $this->getCacheKey($from, $to);
         return $this->cache->fetch($cacheKey);
     }
 }

 /**
  * Get metadata for a certain class - loads once and caches
  * @param  string                $className
  * @throws \Drest\DrestException
  * @return ClassMetaData         $metaData
  */
 public function getMetadataForClass($className)
 {
     if (isset($this->loadedMetadata[$className])) {
         return $this->loadedMetadata[$className];
     }
     // check the cache
     if ($this->cache !== null) {
         $classMetadata = $this->cache->fetch($this->cache_prefix . $className);
         if ($classMetadata instanceof ClassMetaData) {
             if ($classMetadata->expired()) {
                 $this->cache->delete($this->cache_prefix . $className);
             } else {
                 $this->loadedMetadata[$className] = $classMetadata;
                 return $classMetadata;
             }
         }
     }
     $classMetadata = $this->driver->loadMetadataForClass($className);
     if ($classMetadata !== null) {
         $this->loadedMetadata[$className] = $classMetadata;
         if ($this->cache !== null) {
             $this->cache->save($this->cache_prefix . $className, $classMetadata);
         }
         return $classMetadata;
     }
     if (is_null($this->loadedMetadata[$className])) {
         throw DrestException::unableToLoadMetaDataFromDriver();
     }
     return $this->loadedMetadata[$className];
 }

 /**
  * {@inheritdoc}
  */
 public function getMetadataFor($value)
 {
     $class = $this->getClass($value);
     if (!$class) {
         throw new InvalidArgumentException(sprintf('Cannot create metadata for non-objects. Got: "%s"', gettype($value)));
     }
     if (isset($this->loadedClasses[$class])) {
         return $this->loadedClasses[$class];
     }
     if ($this->cache && ($this->loadedClasses[$class] = $this->cache->fetch($class))) {
         return $this->loadedClasses[$class];
     }
     if (!class_exists($class) && !interface_exists($class)) {
         throw new InvalidArgumentException(sprintf('The class or interface "%s" does not exist.', $class));
     }
     $classMetadata = new ClassMetadata($class);
     $this->loader->loadClassMetadata($classMetadata);
     $reflectionClass = $classMetadata->getReflectionClass();
     // Include metadata from the parent class
     if ($parent = $reflectionClass->getParentClass()) {
         $classMetadata->merge($this->getMetadataFor($parent->name));
     }
     // Include metadata from all implemented interfaces
     foreach ($reflectionClass->getInterfaces() as $interface) {
         $classMetadata->merge($this->getMetadataFor($interface->name));
     }
     if ($this->cache) {
         $this->cache->save($class, $classMetadata);
     }
     return $this->loadedClasses[$class] = $classMetadata;
 }

 /**
  * @Route("/entry-point/{mac}", defaults={"mac" = null})
  * @Method({"GET", "POST"})
  * @Template()
  */
 public function indexAction(Request $request, $mac)
 {
     // Attempting to do anything here as a logged in user will fail. Set the current user token to null to log user out.
     $this->get('security.token_storage')->setToken(null);
     if (!$mac) {
         if (!$request->getSession()->get('auth-data')) {
             // No MAC code, nothing in the session, so we can't help - return to front page.
             return $this->redirectToRoute('barbon_hostedapi_app_index_index');
         }
     } else {
         $cacheKey = sprintf('mac-%s', $mac);
         // If MAC isn't found in the cache, it's already been processed - redirect back to this route without the MAC, and try again.
         if (!$this->cache->contains($cacheKey)) {
             return $this->redirectToRoute('barbon_hostedapi_landlord_authentication_entrypoint_index');
         }
         // store data to session and empty the cache
         $authData = unserialize($this->cache->fetch($cacheKey));
         $request->getSession()->set('auth-data', $authData);
         $this->cache->delete($cacheKey);
     }
     // Decide which tab should start as visible, so that is a registration attempt is in progress it re-shows that tab.
     $selectedTab = $request->query->get('action') ?: 'register';
     if ($request->isMethod(Request::METHOD_POST)) {
         if ($request->request->has('direct_landlord')) {
             $selectedTab = 'register';
         }
     }
     return array('selectedTab' => $selectedTab);
 }

 /**
  * {@inheritdoc}
  */
 public function fetch($key)
 {
     if (false === ($value = $this->cache->fetch($key))) {
         return null;
     }
     return $value;
 }

 /**
  * Get the list of videos from YouTube
  *
  * @param string $channelId
  * @throws \Mcfedr\YouTube\LiveStreamsBundle\Exception\MissingChannelIdException
  * @return array
  */
 public function getStreams($channelId = null)
 {
     if (!$channelId) {
         $channelId = $this->channelId;
     }
     if (!$channelId) {
         throw new MissingChannelIdException("You must specify the channel id");
     }
     if ($this->cache) {
         $data = $this->cache->fetch($this->getCacheKey($channelId));
         if ($data !== false) {
             return $data;
         }
     }
     $searchResponse = $this->client->get('search', ['query' => ['part' => 'id', 'channelId' => $channelId, 'eventType' => 'live', 'type' => 'video', 'maxResults' => 50]]);
     $searchData = json_decode($searchResponse->getBody()->getContents(), true);
     $videosResponse = $this->client->get('videos', ['query' => ['part' => 'id,snippet,liveStreamingDetails', 'id' => implode(',', array_map(function ($video) {
         return $video['id']['videoId'];
     }, $searchData['items']))]]);
     $videosData = json_decode($videosResponse->getBody()->getContents(), true);
     $streams = array_map(function ($video) {
         return ['name' => $video['snippet']['title'], 'thumb' => $video['snippet']['thumbnails']['high']['url'], 'videoId' => $video['id']];
     }, array_values(array_filter($videosData['items'], function ($video) {
         return !isset($video['liveStreamingDetails']['actualEndTime']);
     })));
     if ($this->cache && $this->cacheTimeout > 0) {
         $this->cache->save($this->getCacheKey($channelId), $streams, $this->cacheTimeout);
     }
     return $streams;
 }

 public function find($id)
 {
     if (is_array($id)) {
         $id = current($id);
     }
     return $this->cache->fetch($id) ?: null;
 }

 /**
  * @param ServerRequestInterface $request
  * @param ResponseInterface $response
  * @param callable $next
  * @return ResponseInterface
  */
 public function __invoke(ServerRequestInterface $request, ResponseInterface $response, callable $next)
 {
     $key = $this->generateKey($request);
     $data = $this->cache->fetch($key);
     if (false !== $data) {
         list($body, $code, $headers) = unserialize($this->cache->fetch($key));
         $response->getBody()->write($body);
         $response = $response->withStatus($code);
         foreach (unserialize($headers) as $name => $value) {
             $response = $response->withHeader($name, $value);
         }
         return $response;
     }
     // prepare headers
     $ttl = $this->config['ttl'];
     $response = $next ? $next($request, $response) : $response;
     $response = $response->withHeader('Cache-Control', sprintf('public,max-age=%d,s-maxage=%d', $ttl, $ttl))->withHeader('ETag', $key);
     // save cache - status code, headers, body
     $body = $response->getBody()->__toString();
     $code = $response->getStatusCode();
     $headers = serialize($response->getHeaders());
     $data = serialize([$body, $code, $headers]);
     $this->cache->save($key, $data, $this->config['ttl']);
     return $response;
 }

 /**
  * Return cached injected instance
  *
  * @param string $class
  * @param string $key
  *
  * @return array
  */
 private function cachedInstance($class, $key)
 {
     $classDir = $this->cache->fetch($key);
     $this->classLoader->register($classDir);
     $instance = $this->cache->fetch("{$key}{$class}");
     return $instance;
 }

 /**
  * {@inheritdoc}
  */
 public function contains($id)
 {
     if ($stored = $this->decorated->fetch($id)) {
         return $this->isDataDecryptable($stored, $id);
     }
     return false;
 }

 /**
  * {@inheritdoc}
  */
 public function getMetadataFor($value)
 {
     $class = $this->getClass($value);
     if (isset($this->loadedClasses[$class])) {
         return $this->loadedClasses[$class];
     }
     if ($this->cache && ($this->loadedClasses[$class] = $this->cache->fetch($class))) {
         return $this->loadedClasses[$class];
     }
     $classMetadata = new ClassMetadata($class);
     $this->loader->loadClassMetadata($classMetadata);
     $reflectionClass = $classMetadata->getReflectionClass();
     // Include metadata from the parent class
     if ($parent = $reflectionClass->getParentClass()) {
         $classMetadata->merge($this->getMetadataFor($parent->name));
     }
     // Include metadata from all implemented interfaces
     foreach ($reflectionClass->getInterfaces() as $interface) {
         $classMetadata->merge($this->getMetadataFor($interface->name));
     }
     if ($this->cache) {
         $this->cache->save($class, $classMetadata);
     }
     return $this->loadedClasses[$class] = $classMetadata;
 }

 public function getArguments(Request $request, $controller)
 {
     if (!is_array($controller)) {
         throw new \InvalidArgumentException('Can not resolve arguments ' . 'for the controller type: "' . ($controller instanceof \Closure ? 'closure' : gettype($controller)) . '" for URI "' . $request->getPathInfo() . '"');
     }
     $id = get_class($controller[0]) . '::' . $controller[1] . '#method-parameters';
     if (($parameters = $this->cacheProvider->fetch($id)) === false) {
         $parameters = $this->getParameters($controller[0], $controller[1]);
         $this->cacheProvider->save($id, $parameters);
     }
     $attributes = $request->attributes->all();
     $arguments = array();
     foreach ($parameters as $name => $options) {
         if (array_key_exists($name, $attributes)) {
             $arguments[] = $attributes[$name];
             continue;
         }
         if (array_key_exists('defaultValue', $options)) {
             $arguments[] = $options['defaultValue'];
             continue;
         }
         throw new \RuntimeException('Controller ' . get_class($controller[0]) . '::' . $controller[1] . ' requires that you provide a value ' . 'for the "$' . $name . '" argument (because there is no default value or ' . 'because there is a non optional argument after this one).');
     }
     return $arguments;
 }