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570 lines
15 KiB
PHP
570 lines
15 KiB
PHP
<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Queue
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id: Queue.php 16939 2009-07-22 02:22:03Z matthew $
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*/
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/**
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* Class for connecting to queues performing common operations.
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*
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* @category Zend
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* @package Zend_Queue
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Queue implements Countable
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{
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/**
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* Use the TIMEOUT constant in the config of a Zend_Queue
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*/
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const TIMEOUT = 'timeout';
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/**
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* Default visibility passed to count
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*/
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const VISIBILITY_TIMEOUT = 30;
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/**
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* Use the NAME constant in the config of Zend_Queue
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*/
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const NAME = 'name';
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/**
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* @var Zend_Queue_Adapter_AdapterInterface
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*/
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protected $_adapter = null;
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/**
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* User-provided configuration
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*
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* @var array
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*/
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protected $_options = array();
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/**
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* Zend_Queue_Message class
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*
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* @var string
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*/
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protected $_messageClass = 'Zend_Queue_Message';
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/**
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* Zend_Queue_Message_Iterator class
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*
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* @var string
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*/
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protected $_messageSetClass = 'Zend_Queue_Message_Iterator';
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/**
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* @var Zend_Log
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*/
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protected $_logger = null;
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/**
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* Constructor
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*
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* Can be called as
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* $queue = new Zend_Queue($config);
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* - or -
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* $queue = new Zend_Queue('array', $config);
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* - or -
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* $queue = new Zend_Queue(null, $config); // Zend_Queue->createQueue();
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*
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* @param string|Zend_Queue_Adapter|array|Zend_Config|null String or adapter instance, or options array or Zend_Config instance
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* @param Zend_Config|array $options Zend_Config or a configuration array
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* @return void
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*/
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public function __construct($spec, $options = array())
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{
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$adapter = null;
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if ($spec instanceof Zend_Queue_Adapter_AdapterInterface) {
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$adapter = $spec;
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} elseif (is_string($spec)) {
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$adapter = $spec;
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} elseif ($spec instanceof Zend_Config) {
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$options = $spec->toArray();
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} elseif (is_array($spec)) {
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$options = $spec;
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}
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// last minute error checking
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if ((null === $adapter)
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&& (!is_array($options) && (!$options instanceof Zend_Config))
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) {
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require_once 'Zend/Queue/Exception.php';
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throw new Zend_Queue_Exception('No valid params passed to constructor');
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}
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// Now continue as we would if we were a normal constructor
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if ($options instanceof Zend_Config) {
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$options = $options->toArray();
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} elseif (!is_array($options)) {
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$options = array();
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}
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// Make sure we have some defaults to work with
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if (!isset($options[self::TIMEOUT])) {
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$options[self::TIMEOUT] = self::VISIBILITY_TIMEOUT;
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}
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// Make sure all defaults are appropriately set.
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if (!array_key_exists('timeout', $options)) {
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$options[self::TIMEOUT] = self::VISIBILITY_TIMEOUT;
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}
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if (array_key_exists('messageClass', $options)) {
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$this->setMessageClass($options['messageClass']);
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}
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if (array_key_exists('messageSetClass', $options)) {
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$this->setMessageSetClass($options['messageSetClass']);
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}
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$this->setOptions($options);
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// if we were passed an adapter we either build the $adapter or use it
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if (null !== $adapter) {
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$this->setAdapter($adapter);
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}
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}
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/**
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* Set queue options
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*
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* @param array $options
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* @return Zend_Queue
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*/
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public function setOptions(array $options)
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{
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$this->_options = array_merge($this->_options, $options);
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return $this;
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}
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/**
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* Set an individual configuration option
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*
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* @param string $name
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* @param mixed $value
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* @return Zend_Queue
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*/
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public function setOption($name, $value)
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{
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$this->_options[(string) $name] = $value;
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return $this;
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}
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/**
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* Returns the configuration options for the queue
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*
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* @return array
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*/
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public function getOptions()
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{
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return $this->_options;
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}
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/**
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* Determine if a requested option has been defined
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*
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* @param string $name
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* @return bool
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*/
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public function hasOption($name)
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{
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return array_key_exists($name, $this->_options);
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}
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/**
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* Retrieve a single option
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*
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* @param string $name
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* @return null|mixed Returns null if option does not exist; option value otherwise
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*/
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public function getOption($name)
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{
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if ($this->hasOption($name)) {
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return $this->_options[$name];
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}
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return null;
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}
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/**
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* Set the adapter for this queue
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*
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* @param string|Zend_Queue_Adapter_AdapterInterface $adapter
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* @return Zend_Queue Provides a fluent interface
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*/
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public function setAdapter($adapter)
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{
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if (is_string($adapter)) {
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if (null === ($adapterNamespace = $this->getOption('adapterNamespace'))) {
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$adapterNamespace = 'Zend_Queue_Adapter';
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}
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$adapterName = str_replace(
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' ',
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'_',
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ucwords(
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str_replace(
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'_',
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' ',
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strtolower($adapterNamespace . '_' . $adapter)
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)
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)
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);
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if (!class_exists($adapterName)) {
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require_once 'Zend/Loader.php';
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Zend_Loader::loadClass($adapterName);
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}
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/*
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* Create an instance of the adapter class.
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* Pass the configuration to the adapter class constructor.
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*/
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$adapter = new $adapterName($this->getOptions(), $this);
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}
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if (!$adapter instanceof Zend_Queue_Adapter_AdapterInterface) {
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require_once 'Zend/Queue/Exception.php';
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throw new Zend_Queue_Exception("Adapter class '" . get_class($adapterName) . "' does not implement Zend_Queue_Adapter_AdapterInterface");
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}
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$this->_adapter = $adapter;
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$this->_adapter->setQueue($this);
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if (null !== ($name = $this->getOption(self::NAME))) {
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$this->_setName($name);
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}
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return $this;
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}
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/**
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* Get the adapter for this queue
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*
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* @return Zend_Queue_Adapter_AdapterInterface
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*/
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public function getAdapter()
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{
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return $this->_adapter;
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}
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/**
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* @param string $className
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* @return Zend_Queue Provides a fluent interface
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*/
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public function setMessageClass($className)
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{
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$this->_messageClass = (string) $className;
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return $this;
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}
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/**
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* @return string
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*/
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public function getMessageClass()
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{
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return $this->_messageClass;
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}
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/**
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* @param string $className
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* @return Zend_Queue Provides a fluent interface
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*/
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public function setMessageSetClass($className)
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{
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$this->_messageSetClass = (string) $className;
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return $this;
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}
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/**
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* @return string
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*/
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public function getMessageSetClass()
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{
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return $this->_messageSetClass;
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}
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/**
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* Get the name of the queue
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*
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* Note: _setName() used to exist, but it caused confusion with createQueue
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* Will evaluate later to see if we should add it back in.
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*
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* @return string
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*/
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public function getName()
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{
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return $this->getOption(self::NAME);
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}
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/**
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* Create a new queue
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*
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* @param string $name queue name
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* @param integer $timeout default visibility timeout
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* @return Zend_Queue|false
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* @throws Zend_Queue_Exception
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*/
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public function createQueue($name, $timeout = null)
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{
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if (!is_string($name)) {
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require_once 'Zend/Queue/Exception.php';
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throw new Zend_Queue_Exception('$name is not a string');
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}
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if ((null !== $timeout) && !is_integer($timeout)) {
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require_once 'Zend/Queue/Exception.php';
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throw new Zend_Queue_Exception('$timeout must be an integer');
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}
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// Default to standard timeout
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if (null === $timeout) {
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$timeout = $this->getOption(self::TIMEOUT);
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}
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// Some queues allow you to create on the fly, but cannot return
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// a list of queues. Stomp protocol for example.
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if ($this->isSupported('create')) {
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if ($this->getAdapter()->isExists($name)) {
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return false;
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}
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if (!$this->getAdapter()->create($name, $timeout)) {
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return false;
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}
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}
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$options = array(
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self::NAME => $name,
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'timeout' => $timeout
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);
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return new self($this->getAdapter(), $options);
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}
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/**
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* Delete the queue this object is working on.
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*
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* This queue is disabled, regardless of the outcome of the deletion
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* of the queue, because the programmers intent is to disable this queue.
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*
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* @return boolean
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*/
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public function deleteQueue()
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{
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if ($this->isSupported('delete')) {
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$deleted = $this->getAdapter()->delete($this->getName());
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}
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else {
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$deleted = true;
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}
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/**
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* @see Zend_Queue_Adapter_Null
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*/
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require_once('Zend/Queue/Adapter/Null.php');
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$this->setAdapter(new Zend_Queue_Adapter_Null($this->getOptions()));
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return $deleted;
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}
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/**
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* Delete a message from the queue
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*
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* Returns true if the message is deleted, false if the deletion is
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* unsuccessful.
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*
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* Returns true if the adapter doesn't support message deletion.
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*
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* @param Zend_Queue_Message $message
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* @return boolean
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* @throws Zend_Queue_Exception
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*/
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public function deleteMessage(Zend_Queue_Message $message)
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{
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if ($this->getAdapter()->isSupported('deleteMessage')) {
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return $this->getAdapter()->deleteMessage($message);
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}
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return true;
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}
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/**
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* Send a message to the queue
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*
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* @param mixed $message message
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* @return Zend_Queue_Message
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* @throws Zend_Queue_Exception
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*/
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public function send($message)
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{
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return $this->getAdapter()->send($message);
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}
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/**
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* Returns the approximate number of messages in the queue
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*
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* @return integer
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*/
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public function count()
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{
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if ($this->getAdapter()->isSupported('count')) {
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return $this->getAdapter()->count();
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}
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return 0;
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}
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/**
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* Return the first element in the queue
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*
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* @param integer $maxMessages
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* @param integer $timeout
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* @return Zend_Queue_Message_Iterator
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*/
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public function receive($maxMessages=null, $timeout=null)
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{
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if (($maxMessages !== null) && !is_integer($maxMessages)) {
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require_once 'Zend/Queue/Exception.php';
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throw new Zend_Queue_Exception('$maxMessages must be an integer or null');
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}
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if (($timeout !== null) && !is_integer($timeout)) {
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require_once 'Zend/Queue/Exception.php';
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throw new Zend_Queue_Exception('$timeout must be an integer or null');
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}
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// Default to returning only one message
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if ($maxMessages === null) {
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$maxMessages = 1;
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}
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// Default to standard timeout
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if ($timeout === null) {
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$timeout = $this->getOption(self::TIMEOUT);
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}
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return $this->getAdapter()->receive($maxMessages, $timeout);
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}
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/**
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* Return a list of queue capabilities functions
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*
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* $array['function name'] = true or false
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* true is supported, false is not supported.
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*
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* @param string $name
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* @return array
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*/
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public function getCapabilities()
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{
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return $this->getAdapter()->getCapabilities();
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}
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/**
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* Indicates if a function is supported or not.
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*
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* @param string $name
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* @return boolean
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*/
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public function isSupported($name)
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{
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$translation = array(
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'deleteQueue' => 'delete',
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'createQueue' => 'create'
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);
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if (isset($translation[$name])) {
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$name = $translation[$name];
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}
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return $this->getAdapter()->isSupported($name);
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}
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/**
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* Get an array of all available queues
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*
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* @return array
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* @throws Zend_Queue_Exception
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*/
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public function getQueues()
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{
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if (!$this->isSupported('getQueues')) {
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throw new Zend_Queue_Exception( __FUNCTION__ . '() is not supported by ' . get_class($this->getAdapter()));
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}
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return $this->getAdapter()->getQueues();
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}
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/**
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* Set the name of the queue
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*
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* This is AN UNSUPPORTED FUNCTION
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*
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* @param string $name
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* @return Zend_Queue|false Provides a fluent interface
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*/
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protected function _setName($name)
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{
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if (!is_string($name)) {
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/**
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* @see Zend_Queue_Exception
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*/
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require_once 'Zend/Queue/Exception.php';
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throw new Zend_Queue_Exception("$name is not a string");
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}
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if ($this->getAdapter()->isSupported('create')) {
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if (!$this->getAdapter()->isExists($name)) {
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$timeout = $this->getOption(self::TIMEOUT);
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if (!$this->getAdapter()->create($name, $timeout)) {
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// Unable to create the new queue
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return false;
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}
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}
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}
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$this->setOption(self::NAME, $name);
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return $this;
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}
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/**
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* returns a listing of Zend_Queue details.
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* useful for debugging
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*
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* @return array
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*/
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public function debugInfo()
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{
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$info = array();
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$info['self'] = get_class($this);
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$info['adapter'] = get_class($this->getAdapter());
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foreach ($this->getAdapter()->getCapabilities() as $feature => $supported) {
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$info['adapter-' . $feature] = ($supported) ? 'yes' : 'no';
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}
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$info['options'] = $this->getOptions();
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$info['options']['driverOptions'] = '[hidden]';
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$info['currentQueue'] = $this->getName();
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$info['messageClass'] = $this->getMessageClass();
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$info['messageSetClass'] = $this->getMessageSetClass();
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return $info;
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}
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}
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