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<?php |
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/** |
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* @author stev leibelt <[email protected]> |
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* @since 2013-06-30 |
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*/ |
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namespace Net\Bazzline\Component\Lock; |
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use InvalidArgumentException; |
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use RuntimeException; |
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/** |
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* Class FileNameLock |
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* |
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* @package Net\Bazzline\Component\Lock |
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* @author stev leibelt <[email protected]> |
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* @since 2013-06-30 |
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*/ |
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class FileNameLock implements LockInterface |
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{ |
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/** @var string */ |
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private $name = ''; |
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/** |
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* @param string $resource |
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*/ |
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public function __construct($resource = '') |
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{ |
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if (strlen($resource) > 0) { |
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$this->setResource($resource); |
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} |
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} |
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/** |
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* @throws \RuntimeException |
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*/ |
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public function acquire() |
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{ |
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if ($this->isLocked()) { |
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throw new RuntimeException( |
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'Can not acquire lock, lock already exists.' |
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); |
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} |
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file_put_contents($this->getResource(), 'process id: ' . getmypid()); |
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} |
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/** |
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* @throws \RuntimeException |
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*/ |
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public function release() |
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{ |
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if (!$this->isLocked()) { |
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throw new RuntimeException( |
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'Can not release lock, no lock exists.' |
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); |
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} |
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unlink($this->getResource()); |
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} |
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/** |
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* @return bool |
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*/ |
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public function isLocked() |
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{ |
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return file_exists($this->getResource()); |
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} |
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/** |
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* @return mixed|string |
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*/ |
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public function getResource() |
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{ |
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if (!$this->isValidName()) { |
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return $this->getDefaultName(); |
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} else { |
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return $this->name; |
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} |
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} |
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/** |
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* @param mixed|string $resource |
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* @throws InvalidArgumentException |
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*/ |
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public function setResource($resource) |
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{ |
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if (is_string($resource)) { |
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$this->name = (string) ($this->stringEndsWithDotLock($resource) |
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? $resource |
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: $resource . '.lock'); |
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} else { |
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throw new InvalidArgumentException( |
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'resource must be of type string' |
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); |
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} |
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} |
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/** |
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* @return bool |
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*/ |
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private function stringEndsWithDotLock($string) |
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{ |
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$endsWith = '.lock'; |
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$lengthOfEndsWith = strlen($endsWith); |
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$stringEnding = substr($string, -$lengthOfEndsWith); |
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return ($stringEnding == $endsWith); |
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} |
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/** |
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* @return boolean |
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*/ |
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private function isValidName() |
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{ |
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return (is_string($this->name) && strlen($this->name) > 0); |
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} |
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/** |
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* @return string |
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*/ |
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private function getDefaultName() |
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{ |
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return (string) str_replace('\\', '_', get_class($this)) . '.lock'; |
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} |
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} |
stevleibelt /
php_component_lock
