/**
* @test
*/
public function readLockCanBeAcquiredTwice()
{
$lock1 = new Lock('testLock', false);
$lock2 = new Lock('testLock', false);
$this->assertTrue($lock1->release(), 'Lock 1 could not be released');
$this->assertTrue($lock2->release(), 'Lock 2 could not be released');
}
/**
* Writes the cache data into the given cache file, using locking.
*
* @param string $cacheEntryPathAndFilename
* @param string $data
* @return boolean|integer Return value of file_put_contents
*/
protected function writeCacheFile($cacheEntryPathAndFilename, $data)
{
$lock = new Lock($cacheEntryPathAndFilename);
$result = file_put_contents($cacheEntryPathAndFilename, $data);
$lock->release();
return $result;
}
/**
* Internal get method, allows to nest locks by using the $acquireLock flag
*
* @param string $entryIdentifier
* @param boolean $acquireLock
* @return bool|string
* @throws \InvalidArgumentException
*/
protected function internalGet($entryIdentifier, $acquireLock = true)
{
if ($entryIdentifier !== basename($entryIdentifier)) {
throw new \InvalidArgumentException('The specified entry identifier must not contain a path segment.', 1282073033);
}
$pathAndFilename = $this->cacheDirectory . $entryIdentifier . $this->cacheEntryFileExtension;
if ($this->frozen === true) {
if ($acquireLock) {
$lock = new Lock($pathAndFilename, false);
}
$result = isset($this->cacheEntryIdentifiers[$entryIdentifier]) ? file_get_contents($this->cacheDirectory . $entryIdentifier . $this->cacheEntryFileExtension) : false;
if ($acquireLock) {
$lock->release();
}
return $result;
}
if ($this->isCacheFileExpired($pathAndFilename, $acquireLock)) {
return false;
}
if ($acquireLock) {
$lock = new Lock($pathAndFilename, false);
}
$cacheData = file_get_contents($pathAndFilename);
if ($acquireLock) {
$lock->release();
}
$dataSize = (int) substr($cacheData, -self::DATASIZE_DIGITS);
return substr($cacheData, 0, $dataSize);
}
