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<?php |
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/* |
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* This file is part of the Mutex Library. |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace AMF\Mutex; |
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use AMF\Mutex\MutexInterface; |
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/** |
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* Adapter to adapt mutex to current context. |
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* |
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* @author Amine Fattouch <[email protected]> |
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*/ |
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class MutexAdapter |
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{ |
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/** |
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* @var MutexInterface |
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*/ |
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protected $mutex; |
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/** |
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* @var integer |
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*/ |
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protected $attemptTotal; |
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/** |
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* @var integer |
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*/ |
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protected $wait; |
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/** |
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* @var string |
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*/ |
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protected $prefix; |
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/** |
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* |
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* @param MutexInterface $mutex |
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* @param integer $attemptTotal |
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* @param integer $wait |
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* @param string $prefix |
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*/ |
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public function __construct(MutexInterface $mutex, $attemptTotal = 10, $wait = 1, $prefix = 'worker_mutex') |
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{ |
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$this->mutex = $mutex; |
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$this->attemptTotal = $attemptTotal; |
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$this->wait = $wait; |
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$this->prefix = $prefix; |
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} |
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/** |
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* Acquires access to Semaphore. |
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* |
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* @param string $key |
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* @param integer $ttl |
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* |
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* @return string |
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*/ |
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public function acquire($key, $ttl = 60) |
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{ |
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$generatedKey = $this->generateKey($key); |
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$attemptTotal = $this->attemptTotal; |
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$mutex = $this->mutex; |
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while ($attemptTotal > 0 && !$acquired = $mutex->acquire($generatedKey, $ttl)) { |
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$attemptTotal --; |
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sleep($this->wait); |
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} |
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if (isset($acquired) === false) { |
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throw new \RuntimeException('Can\'t acquire the mutex. it\'s already taken by another process.'); |
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} |
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return $generatedKey; |
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} |
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/** |
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* Releases access to Semaphore. |
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* |
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* @param string $key |
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*/ |
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public function release($key) |
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{ |
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$generatedKey = $this->generateKey($key); |
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if ($this->mutex->release($generatedKey) === false) { |
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throw new \RuntimeException('Can\'t relase the mutex. you must acquire it first.'); |
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} |
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} |
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/** |
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* Generates a key with prefix. |
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* |
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* @param string $key |
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* |
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* @return string |
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*/ |
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protected function generateKey($key) |
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{ |
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return $this->prefix.$key; |
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} |
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} |
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fattouchsquall /
AMFMutex
