/**
* {@inheritdoc}
*/
public function flush()
{
if (!$this->structuresToInvalidate) {
return false;
}
foreach ($this->structuresToInvalidate as $structure) {
$banKey = $this->getBanKey($structure->getUuid());
$this->proxyClient->ban([self::TAGS_HEADER => sprintf('(%s)(,.+)?$', preg_quote($banKey))]);
}
$this->proxyClient->flush();
return true;
}
/**
* Invalidate all cached objects matching the provided HTTP headers.
*
* Each header is a a POSIX regular expression, for example
* ['X-Host' => '^(www\.)?(this|that)\.com$']
*
* @see BanInterface::ban()
*
* @param array $headers HTTP headers that path must match to be banned.
*
* @throws UnsupportedProxyOperationException If HTTP cache does not support BAN requests
*
* @return $this
*/
public function invalidate(array $headers)
{
if (!$this->cache instanceof BanInterface) {
throw UnsupportedProxyOperationException::cacheDoesNotImplement('BAN');
}
$this->cache->ban($headers);
return $this;
}
/**
* Invalidate cache entries that contain any of the specified tags in their
* tag header.
*
* @see BanInterface::ban()
*
* @param array $tags Cache tags
*
* @throws UnsupportedProxyOperationException If HTTP cache does not support BAN requests
*
* @return $this
*/
public function invalidateTags(array $tags)
{
if (!$this->cache instanceof BanInterface) {
throw UnsupportedProxyOperationException::cacheDoesNotImplement('BAN');
}
$headers = array($this->getTagsHeader() => '('.implode('|', array_map('preg_quote', $tags)).')(,.+)?$');
$this->cache->ban($headers);
return $this;
}
