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<?php |
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/* |
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* This file is part of the Phive Queue package. |
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* |
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* (c) Eugene Leonovich <[email protected]> |
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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 Phive\Queue; |
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class SysVQueue implements Queue |
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{ |
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/** |
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* @var int |
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*/ |
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private $key; |
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/** |
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* @var bool |
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*/ |
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private $serialize; |
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/** |
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* @var int |
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*/ |
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private $perms = 0666; |
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/** |
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* @var int |
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*/ |
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private $itemMaxLength = 8192; |
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/** |
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* @var resource |
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*/ |
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private $queue; |
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public function __construct($key, $serialize = null, $perms = null) |
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{ |
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$this->key = $key; |
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$this->serialize = (bool) $serialize; |
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if (null !== $perms) { |
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$this->perms = $perms; |
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} |
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} |
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public function setItemMaxLength($length) |
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{ |
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$this->itemMaxLength = $length; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function push($item, $eta = null) |
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{ |
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$eta = QueueUtils::normalizeEta($eta); |
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if (!msg_send($this->getQueue(), $eta, $item, $this->serialize, false, $errorCode)) { |
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throw new QueueException($this, self::getErrorMessage($errorCode), $errorCode); |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function pop() |
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{ |
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if (!msg_receive($this->getQueue(), -time(), $eta, $this->itemMaxLength, $item, $this->serialize, MSG_IPC_NOWAIT, $errorCode)) { |
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throw (MSG_ENOMSG === $errorCode) |
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? new NoItemAvailableException($this) |
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: new QueueException($this, self::getErrorMessage($errorCode), $errorCode); |
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} |
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return $item; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function count() |
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{ |
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$data = msg_stat_queue($this->getQueue()); |
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if (!is_array($data)) { |
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throw new QueueException($this, 'Failed to get the meta data for the queue.'); |
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} |
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return $data['msg_qnum']; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function clear() |
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{ |
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if (!msg_remove_queue($this->getQueue())) { |
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throw new QueueException($this, 'Failed to destroy the queue.'); |
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} |
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$this->queue = null; |
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} |
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private function getQueue() |
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{ |
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if (!is_resource($this->queue)) { |
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$this->queue = msg_get_queue($this->key, $this->perms); |
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if (!is_resource($this->queue)) { |
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throw new QueueException($this, 'Failed to create/attach to the queue.'); |
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} |
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} |
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return $this->queue; |
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} |
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private static function getErrorMessage($errorCode) |
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{ |
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if ($errorCode) { |
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return posix_strerror($errorCode).'.'; |
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} |
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$error = error_get_last(); |
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if ($error && 0 === strpos($error['message'], 'msg_')) { |
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return preg_replace('/^msg_[^:]+?\:\s/', '', $error['message']); |
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} |
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return 'Unknown error.'; |
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} |
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} |
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rybakit /
phive-queue
This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent.
Consider making the comparison explicit by using
empty(..)or! empty(...)instead.