PHP JCache::get方法代码示例

 /**
  * Recupera una lista de los items de menu publicados en Joomla!
  *
  * @return array Lista de menùes recuperados
  */
 function getJoomlaMenuItems()
 {
     $dbo =& JFactory::getDBO();
     $query = 'SELECT ' . $dbo->nameQuote('m.id') . ', ' . $dbo->nameQuote('m.name') . ' FROM ' . $dbo->nameQuote('#__menu') . ' m' . ' WHERE ' . $dbo->nameQuote('published') . ' = 1';
     $dbo->setQuery($query);
     return $this->_cache->get(array($dbo, 'loadObjectList'), array());
 }

 function checkCache()
 {
     $app = JFactory::getApplication();
     $user = JFactory::getUser();
     if ($this->_recache) {
         $this->_cache->remove($this->_cache_key);
         return;
     }
     if ($app->isAdmin() || $this->isDisabled() || count($app->getMessageQueue()) || $user->get('admin') || $app->input->getMethod() !== 'GET') {
         return;
     }
     $data = $this->_cache->get($this->_cache_key);
     if (false === strpos($data, sprintf('cached:%d', $this->_cache_version))) {
         // Logger::d('ERROR: Cache version mismatch');
         return;
     }
     if ($data !== false) {
         // Set cached body.
         $app->setBody($data);
         echo $app->toString($app->get('gzip'));
         // Logger::d(__METHOD__.' from cache');
         $app->close();
         exit;
     }
 }

 /**
  * Recupera una lista de los values asociados a un tag menu.
  *
  * @return array Lista de values recuperados
  */
 function getCpMenuValues($field_id)
 {
     $tipo = $this->getTipo('menu');
     $dbo =& JFactory::getDBO();
     $query = 'SELECT ' . $dbo->nameQuote('v.id') . ', ' . $dbo->nameQuote('v.name') . ', ' . $dbo->nameQuote('v.label') . ' FROM ' . $dbo->nameQuote('#__custom_properties_values') . ' v' . ' INNER JOIN ' . $dbo->nameQuote('#__zonales_cp2tipotag') . ' tt' . ' ON ' . $dbo->nameQuote('tt.field_id') . ' = ' . $dbo->nameQuote('v.field_id') . ' AND ' . $dbo->nameQuote('tt.tipo_id') . ' = ' . $tipo->id . ' AND ' . $dbo->nameQuote('tt.field_id') . ' = ' . $field_id;
     $dbo->setQuery($query);
     return $this->_cache->get(array($dbo, 'loadObjectList'), array());
 }

 /**
  * Recupera los datos desde el modelo (un solo registro)
  *
  * @param boolean $reload recargar datos desde bd o utilizar copia de la instancia
  * @return Object registro especificado en la bd
  */
 function &getData($reload = false, $customQuery = false)
 {
     if (empty($this->_data) || $reload) {
         $query = $this->_buildQuery($customQuery);
         $this->_db->setQuery($query);
         //$this->_data = $this->_db->loadObject();
         $this->_data = $this->_cache->get(array($this->_db, 'loadObject'), array());
     }
     if (!$this->_data) {
         $this->_data =& $this->getTable();
     }
     return $this->_data;
 }

 /**
  * Retrieves the table schema information about the given table
  *
  * This function try to get the table schema from the cache. If it cannot be found the table schema will be
  * retrieved from the database and stored in the cache.
  *
  * @param   string  $table A table name or a list of table names
  * @return  KDatabaseSchemaTable
  */
 public function getTableSchema($table)
 {
     if (!isset($this->_table_schema[$table]) && isset($this->_cache)) {
         $identifier = md5($this->getDatabase() . $table);
         if (!($schema = $this->_cache->get($identifier))) {
             $schema = parent::getTableSchema($table);
             //Store the object in the cache
             $this->_cache->store(serialize($schema), $identifier);
         } else {
             $schema = unserialize($schema);
         }
         $this->_table_schema[$table] = $schema;
     }
     return parent::getTableSchema($table);
 }

 /**
  * Parse the template
  *
  * This function implements a caching mechanism when reading the template. If the template cannot be found in the
  * cache it will be filtered and stored in the cache. Otherwise it will be loaded from the cache and returned
  * directly.
  *
  * @param string The template content to parse
  * @return void
  */
 protected function _parse(&$content)
 {
     if (isset($this->_cache)) {
         $identifier = md5($this->getPath());
         if (!$this->_cache->get($identifier)) {
             parent::_parse($content);
             //Store the object in the cache
             $this->_cache->store($content, $identifier);
         } else {
             $content = $this->_cache->get($identifier);
         }
     } else {
         parent::_parse($content);
     }
 }

 /**
  * Get stored cached data by id and group
  *
  * @param   string  $id     The cache data id
  * @param   string  $group  The cache data group
  *
  * @return  mixed   False on no result, cached object otherwise
  *
  * @since   11.1
  */
 public function get()
 {
     $numargs = func_num_args();
     if ($numargs <= 0) {
         return false;
     }
     $id = func_get_arg(0);
     $group = $numargs > 1 ? func_get_arg(1) : null;
     $data = $this->cache->get($id, $group);
     if ($data === false) {
         $locktest = new stdClass();
         $locktest->locked = null;
         $locktest->locklooped = null;
         $locktest = $this->cache->lock($id, $group);
         if ($locktest->locked == true && $locktest->locklooped == true) {
             $data = $this->cache->get($id, $group);
         }
         if ($locktest->locked == true) {
             $this->cache->unlock($id, $group);
         }
     }
     // Check again because we might get it from second attempt
     if ($data !== false) {
         $data = unserialize(trim($data));
         // trim to fix unserialize errors
     }
     return $data;
 }

 /**
  * Recupera los valores del tag indicado
  *
  * @param int id identificador del tag
  * @return array Arreglo de objetos value
  */
 function getMenuValues($id, $eq = false)
 {
     if (is_null($id)) {
         return null;
     }
     $dbo =& JFactory::getDBO();
     $query = 'SELECT ' . $dbo->nameQuote('v.id') . ', ' . $dbo->nameQuote('v.name') . ', ' . $dbo->nameQuote('v.label') . ', ' . $dbo->nameQuote('jm.link') . ', ' . $dbo->nameQuote('zm.menu_id') . ($eq ? ', b.peso' : '') . ' FROM ' . $dbo->nameQuote('#__custom_properties_values') . ' v' . ' INNER JOIN ' . $dbo->nameQuote('#__zonales_menu') . ' zm' . ' ON ' . $dbo->nameQuote('zm.value_id') . ' = ' . $dbo->nameQuote('v.id') . ' INNER JOIN ' . $dbo->nameQuote('#__menu') . ' jm' . ' ON ' . $dbo->nameQuote('jm.id') . ' = ' . $dbo->nameQuote('zm.menu_id');
     // ecualiza
     if ($eq) {
         require_once JPATH_BASE . DS . 'components' . DS . 'com_eqzonales' . DS . 'controllers' . DS . 'eq.php';
         JTable::addIncludePath(JPATH_ADMINISTRATOR . DS . 'components' . DS . 'com_eqzonales' . DS . 'tables');
         $ctrlEq = new EqZonalesControllerEq();
         $ctrlEq->addModelPath(JPATH_ADMINISTRATOR . DS . 'components' . DS . 'com_eqzonales' . DS . 'models');
         // recupera ecualizador del usuario
         $user =& JFactory::getUser();
         $result = $ctrlEq->retrieveUserEqImpl($user->id);
         if (!is_null($result) && !empty($result)) {
             $eq = $result[0];
             $query .= ' LEFT JOIN ' . $dbo->nameQuote('#__eqzonales_banda') . ' b' . ' ON ' . $dbo->nameQuote('v.id') . ' = ' . $dbo->nameQuote('b.cp_value_id') . ' AND ' . $dbo->nameQuote('b.eq_id') . ' = ' . $eq->eq->id;
         }
     }
     // where
     $query .= ' WHERE ' . $dbo->nameQuote('v.field_id') . ' = ' . $id;
     // ordena según ecualización
     if ($eq) {
         $query .= ' ORDER BY b.peso DESC';
     }
     $dbo->setQuery($query);
     return $this->_cache->get(array($dbo, 'loadObjectList'), array());
 }

 /**
  * @param $checksum
  *
  * @return bool|mixed
  */
 protected function isOutputExpired(RokBooster_Compressor_IGroup $group, $is_wrapped = true)
 {
     $oc = RokBooster_Compressor_OutputContainerFactory::create($group, $this->options);
     if (!$oc->doesExist($is_wrapped)) {
         return true;
     }
     if ($expired = $oc->isExpired($is_wrapped)) {
         $files_changed = false;
         if ($file_group = $this->file_info_cache->get($group->getChecksum() . '_fileinfo')) {
             $file_group = unserialize($file_group);
             /** @var $file RokBooster_Compressor_File */
             foreach ($file_group as $file) {
                 if (file_exists($file->getPath()) && is_readable($file->getPath())) {
                     if ($file->hasChanged()) {
                         $files_changed = true;
                         break;
                     }
                 } else {
                     $this->file_info_cache->remove($group->getChecksum() . '_fileinfo');
                     $files_changed = true;
                     break;
                 }
             }
         } else {
             $files_changed = true;
         }
         if (!$files_changed) {
             $oc->setAsValid();
             return false;
         }
     }
     return $expired;
 }

 /**
  * A convenience event handler to obtain the text related to an option's 
  * value.
  * 
  * The event cache's the options for quicker lookup and to reduce load on 
  * the database. Therefore, there may be some delay between new items 
  * being added to JReviews and what is retrieved by this event. 
  * 
  * @param string $value The option's value.
  * @return string The text related to the option's value.
  */
 public function onJSolrSearchOptionLookup($value)
 {
     $conf = JFactory::getConfig();
     $options = array('defaultgroup' => 'plg_jsolrsearch_jreviews', 'cachebase' => $conf->getValue('config.cache_path'), 'lifetime' => $conf->getValue('config.cachetime') * 60, 'language' => $conf->getValue('config.language'), 'storage' => $conf->getValue('config.storage', 'file'));
     $cache = new JCache($options);
     $cache->setCaching(true);
     if (!($list = json_decode($cache->get('options', $options['defaultgroup'])))) {
         $database = JFactory::getDbo();
         $query = $database->getQuery(true);
         $query->select(array('text', 'value'))->from('#__jreviews_fieldoptions');
         $database->setQuery($query);
         $list = $database->loadObjectList();
         // cache these options so we don't need to keep loading from db.
         $cache->store(json_encode($list), $options['defaultgroup']);
     }
     $found = false;
     $text = "";
     while (!$found && ($item = current($list))) {
         if ($item->value == $value) {
             $found = true;
             $text = $item->text;
         }
         next($list);
     }
     return $text;
 }

 /**
  * Get the cached page data
  *
  * @access	public
  * @param	string	$id		The cache data id
  * @param	string	$group	The cache data group
  * @return	boolean	True if the cache is hit (false else)
  * @since	1.5
  */
 function get($id = false, $group = 'page')
 {
     // Initialize variables
     $data = false;
     // If an id is not given generate it from the request
     if ($id == false) {
         $id = $this->_makeId();
     }
     // If the etag matches the page id ... sent a no change header and exit : utilize browser cache
     if (!headers_sent() && isset($_SERVER['HTTP_IF_NONE_MATCH'])) {
         $etag = stripslashes($_SERVER['HTTP_IF_NONE_MATCH']);
         if ($etag == $id) {
             $browserCache = isset($this->_options['browsercache']) ? $this->_options['browsercache'] : false;
             if ($browserCache) {
                 $this->_noChange();
             }
         }
     }
     // We got a cache hit... set the etag header and echo the page data
     $data = parent::get($id, $group);
     if ($data !== false) {
         $this->_setEtag($id);
         return $data;
     }
     // Set id and group placeholders
     $this->_id = $id;
     $this->_group = $group;
     return false;
 }

	/**
	 * Get stored cached data by id and group
	 *
	 * @param   string  $id     The cache data id
	 * @param   string  $group  The cache data group
	 *
	 * @return  mixed   False on no result, cached object otherwise
	 *
	 * @since   11.1
	 */
	public function get($id, $group = null)
	{
		$data = false;
		$data = $this->cache->get($id, $group);

		if ($data === false)
		{
			$locktest = new stdClass;
			$locktest->locked = null;
			$locktest->locklooped = null;
			$locktest = $this->cache->lock($id, $group);

			if ($locktest->locked == true && $locktest->locklooped == true)
			{
				$data = $this->cache->get($id, $group);
			}
			if ($locktest->locked == true)
			{
				$this->cache->unlock($id, $group);
			}
		}

		// Check again because we might get it from second attempt
		if ($data !== false)
		{
			// Trim to fix unserialize errors
			$data = unserialize(trim($data));
		}
		return $data;
	}

	/**
	 * Testing Gc().
	 *
	 * @return void
	 */
	public function testGc()
	{
		$this->object = JCache::getInstance('output', array('lifetime' => 2, 'defaultgroup' => ''));
		$this->object->store(
			'Now is the time for all good people to throw a party.',
			42,
			''
		);
		$this->object->store(
			'And this is the cache that tries men\'s souls',
			42,
			''
		);
		sleep(5);
		$this->object->gc();
		$this->assertThat(
			$this->object->get(42, ''),
			$this->isFalse(),
			'Should not retrieve the data properly'
		);
		$this->assertThat(
			$this->object->get(42, ''),
			$this->isFalse(),
			'Should not retrieve the data properly'
		);
	}

 /**
  * @param $checksum
  *
  * @return bool|mixed
  */
 protected function isCacheExpired($checksum)
 {
     if (!$this->cache->doesCacheExist($checksum)) {
         return true;
     }
     if ($expired = $this->cache->isCacheExpired($checksum)) {
         $files_changed = false;
         if ($file_group = $this->file_info_cache->get($checksum . '_fileinfo')) {
             $file_group = unserialize($file_group);
             /** @var $file RokBooster_Compressor_File */
             foreach ($file_group as $file) {
                 if (file_exists($file->getPath()) && is_readable($file->getPath())) {
                     if ($file->hasChanged()) {
                         $files_changed = true;
                         break;
                     }
                 } else {
                     $this->file_info_cache->remove($checksum . '_fileinfo');
                     $files_changed = true;
                     break;
                 }
             }
         } else {
             $files_changed = true;
         }
         if (!$files_changed) {
             $this->cache->setCacheAsValid($checksum);
             return false;
         }
     }
     return $expired;
 }

 /**
  * Testing Gc().
  *
  * @medium
  *
  * @return void
  */
 public function testGc()
 {
     $this->object = JCache::getInstance('output', array('lifetime' => 2, 'defaultgroup' => ''));
     $this->object->store($this->testData_A, 42, '');
     $this->object->store($this->testData_B, 43, '');
     sleep(5);
     $this->object->gc();
     $this->assertFalse($this->object->get(42, ''));
     $this->assertFalse($this->object->get(43, ''));
 }