/**
* Constructs the cache
*
* @param string $identifier A identifier which describes this cache
* @param \TYPO3\Flow\Cache\Backend\BackendInterface $backend Backend to be used for this cache
* @throws \InvalidArgumentException if the identifier doesn't match PATTERN_ENTRYIDENTIFIER
*/
public function __construct($identifier, \TYPO3\Fluid\Cache\Backend\BackendInterface $backend)
{
if (preg_match(self::PATTERN_ENTRYIDENTIFIER, $identifier) !== 1) {
throw new \InvalidArgumentException('"' . $identifier . '" is not a valid cache identifier.', 1203584729);
}
$this->identifier = $identifier;
$this->backend = $backend;
$this->backend->setCache($this);
}
/**
* Sets a reference to the cache frontend which uses this backend and
* initializes the default cache directory.
*
* @param \TYPO3\Flow\Cache\Frontend\FrontendInterface $cache The cache frontend
* @return void
* @throws \TYPO3\Flow\Cache\Exception
*/
public function setCache(FrontendInterface $cache)
{
parent::setCache($cache);
$codeOrData = $cache instanceof PhpFrontend ? 'Code' : 'Data';
$cacheDirectory = $this->cacheDirectory ?: $this->environment->getPathToTemporaryDirectory() . 'Cache/' . $codeOrData . '/' . $this->cacheIdentifier . '/';
if (!is_writable($cacheDirectory)) {
try {
\TYPO3\Flow\Utility\Files::createDirectoryRecursively($cacheDirectory);
} catch (\TYPO3\Flow\Utility\Exception $exception) {
throw new \TYPO3\Flow\Cache\Exception('The cache directory "' . $cacheDirectory . '" could not be created.', 1264426237);
}
}
if (!is_dir($cacheDirectory) && !is_link($cacheDirectory)) {
throw new \TYPO3\Flow\Cache\Exception('The cache directory "' . $cacheDirectory . '" does not exist.', 1203965199);
}
if (!is_writable($cacheDirectory)) {
throw new \TYPO3\Flow\Cache\Exception('The cache directory "' . $cacheDirectory . '" is not writable.', 1203965200);
}
$this->cacheDirectory = $cacheDirectory;
$this->cacheEntryFileExtension = $cache instanceof PhpFrontend ? '.php' : '';
if (strlen($this->cacheDirectory) + 23 > $this->environment->getMaximumPathLength()) {
throw new \TYPO3\Flow\Cache\Exception('The length of the temporary cache path "' . $this->cacheDirectory . '" exceeds the maximum path length of ' . ($this->environment->getMaximumPathLength() - 23) . '. Please consider setting the temporaryDirectoryBase option to a shorter path. ', 1248710426);
}
}
/**
* Sets a reference to the cache frontend which uses this backend and
* initializes the default cache directory.
*
* @param \TYPO3\Flow\Cache\Frontend\FrontendInterface $cache The cache frontend
* @return void
* @throws Exception
*/
public function setCache(FrontendInterface $cache)
{
parent::setCache($cache);
$cacheDirectory = $this->cacheDirectory;
if ($cacheDirectory == '') {
$codeOrData = $cache instanceof PhpFrontend ? 'Code' : 'Data';
$baseDirectory = $this->cacheManager->isCachePersistent($cache->getIdentifier()) ? FLOW_PATH_DATA . 'Persistent/' : $this->environment->getPathToTemporaryDirectory();
$cacheDirectory = $baseDirectory . 'Cache/' . $codeOrData . '/' . $this->cacheIdentifier . '/';
}
if (!is_writable($cacheDirectory)) {
try {
\TYPO3\Flow\Utility\Files::createDirectoryRecursively($cacheDirectory);
} catch (\TYPO3\Flow\Utility\Exception $exception) {
throw new Exception('The cache directory "' . $cacheDirectory . '" could not be created.', 1264426237);
}
}
if (!is_dir($cacheDirectory) && !is_link($cacheDirectory)) {
throw new Exception('The cache directory "' . $cacheDirectory . '" does not exist.', 1203965199);
}
if (!is_writable($cacheDirectory)) {
throw new Exception('The cache directory "' . $cacheDirectory . '" is not writable.', 1203965200);
}
$this->cacheDirectory = $cacheDirectory;
$this->cacheEntryFileExtension = $cache instanceof PhpFrontend ? '.php' : '';
}
/**
* Initializes the identifier prefix when setting the cache.
*
* @param FrontendInterface $cache
* @return void
*/
public function setCache(FrontendInterface $cache)
{
parent::setCache($cache);
$pathHash = substr(md5(FLOW_PATH_ROOT . $this->context . $cache->getIdentifier()), 0, 12);
$this->identifierPrefix = 'Flow_' . $pathHash . '_';
}
/**
* Initializes this frontend
*
* The backend is connected with this frontend in initializeObject(), not in __construct(), because the Cache Factory
* needs an opportunity to register the cache before the backend's setCache() method is called. See
* CacheFactory::create() for details. A backend (for example the SimpleFileBackend) may rely on the cache already
* being registered at the CacheManager when its setCache() method is called.
*
* @return void
*/
public function initializeObject()
{
$this->backend->setCache($this);
}
