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Initial import.
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231
vendor/doctrine/common/lib/Doctrine/Common/Cache/CacheProvider.php
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vendor/doctrine/common/lib/Doctrine/Common/Cache/CacheProvider.php
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<?php
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/*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the MIT license. For more information, see
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* <http://www.doctrine-project.org>.
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*/
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namespace Doctrine\Common\Cache;
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/**
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* Base class for cache provider implementations.
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*
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* @since 2.2
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* @author Benjamin Eberlei <kontakt@beberlei.de>
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* @author Guilherme Blanco <guilhermeblanco@hotmail.com>
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* @author Jonathan Wage <jonwage@gmail.com>
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* @author Roman Borschel <roman@code-factory.org>
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* @author Fabio B. Silva <fabio.bat.silva@gmail.com>
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*/
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abstract class CacheProvider implements Cache
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{
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const DOCTRINE_NAMESPACE_CACHEKEY = 'DoctrineNamespaceCacheKey[%s]';
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/**
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* @var string The namespace to prefix all cache ids with
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*/
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private $namespace = '';
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/**
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* @var string The namespace version
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*/
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private $namespaceVersion;
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/**
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* Set the namespace to prefix all cache ids with.
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*
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* @param string $namespace
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* @return void
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*/
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public function setNamespace($namespace)
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{
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$this->namespace = (string) $namespace;
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}
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/**
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* Retrieve the namespace that prefixes all cache ids.
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*
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* @return string
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*/
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public function getNamespace()
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{
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return $this->namespace;
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}
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/**
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* {@inheritdoc}
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*/
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public function fetch($id)
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{
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return $this->doFetch($this->getNamespacedId($id));
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}
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/**
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* {@inheritdoc}
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*/
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public function contains($id)
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{
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return $this->doContains($this->getNamespacedId($id));
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}
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/**
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* {@inheritdoc}
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*/
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public function save($id, $data, $lifeTime = 0)
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{
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return $this->doSave($this->getNamespacedId($id), $data, $lifeTime);
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}
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/**
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* {@inheritdoc}
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*/
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public function delete($id)
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{
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return $this->doDelete($this->getNamespacedId($id));
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}
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/**
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* {@inheritdoc}
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*/
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public function getStats()
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{
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return $this->doGetStats();
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}
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/**
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* Deletes all cache entries.
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*
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* @return boolean TRUE if the cache entries were successfully flushed, FALSE otherwise.
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*/
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public function flushAll()
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{
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return $this->doFlush();
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}
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/**
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* Delete all cache entries.
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*
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* @return boolean TRUE if the cache entries were successfully deleted, FALSE otherwise.
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*/
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public function deleteAll()
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{
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$namespaceCacheKey = $this->getNamespaceCacheKey();
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$namespaceVersion = $this->getNamespaceVersion() + 1;
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$this->namespaceVersion = $namespaceVersion;
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return $this->doSave($namespaceCacheKey, $namespaceVersion);
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}
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/**
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* Prefix the passed id with the configured namespace value
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*
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* @param string $id The id to namespace
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* @return string $id The namespaced id
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*/
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private function getNamespacedId($id)
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{
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$namespaceVersion = $this->getNamespaceVersion();
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return sprintf('%s[%s][%s]', $this->namespace, $id, $namespaceVersion);
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}
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/**
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* Namespace cache key
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*
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* @return string $namespaceCacheKey
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*/
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private function getNamespaceCacheKey()
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{
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return sprintf(self::DOCTRINE_NAMESPACE_CACHEKEY, $this->namespace);
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}
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/**
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* Namespace version
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*
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* @return string $namespaceVersion
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*/
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private function getNamespaceVersion()
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{
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if (null !== $this->namespaceVersion) {
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return $this->namespaceVersion;
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}
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$namespaceCacheKey = $this->getNamespaceCacheKey();
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$namespaceVersion = $this->doFetch($namespaceCacheKey);
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if (false === $namespaceVersion) {
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$namespaceVersion = 1;
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$this->doSave($namespaceCacheKey, $namespaceVersion);
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}
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$this->namespaceVersion = $namespaceVersion;
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return $this->namespaceVersion;
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}
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/**
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* Fetches an entry from the cache.
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*
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* @param string $id cache id The id of the cache entry to fetch.
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* @return string The cached data or FALSE, if no cache entry exists for the given id.
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*/
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abstract protected function doFetch($id);
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/**
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* Test if an entry exists in the cache.
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*
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* @param string $id cache id The cache id of the entry to check for.
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* @return boolean TRUE if a cache entry exists for the given cache id, FALSE otherwise.
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*/
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abstract protected function doContains($id);
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/**
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* Puts data into the cache.
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*
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* @param string $id The cache id.
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* @param string $data The cache entry/data.
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* @param bool|int $lifeTime The lifetime. If != false, sets a specific lifetime for this
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* cache entry (null => infinite lifeTime).
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*
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* @return boolean TRUE if the entry was successfully stored in the cache, FALSE otherwise.
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*/
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abstract protected function doSave($id, $data, $lifeTime = false);
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/**
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* Deletes a cache entry.
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*
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* @param string $id cache id
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* @return boolean TRUE if the cache entry was successfully deleted, FALSE otherwise.
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*/
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abstract protected function doDelete($id);
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/**
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* Deletes all cache entries.
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*
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* @return boolean TRUE if the cache entry was successfully deleted, FALSE otherwise.
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*/
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abstract protected function doFlush();
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/**
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* Retrieves cached information from data store
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*
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* @since 2.2
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* @return array An associative array with server's statistics if available, NULL otherwise.
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*/
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abstract protected function doGetStats();
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}
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