/usr/share/php/Horde/Kolab/Storage/Data/Cached.php is in php-horde-kolab-storage 2.0.5-1.
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/**
* The cache decorator for Kolab storage data handlers.
*
* PHP version 5
*
* @category Kolab
* @package Kolab_Storage
* @author Gunnar Wrobel <wrobel@pardus.de>
* @license http://www.horde.org/licenses/lgpl21 LGPL 2.1
* @link http://pear.horde.org/index.php?package=Kolab_Storage
*/
/**
* The cache decorator for Kolab storage data handlers.
*
* Copyright 2011-2013 Horde LLC (http://www.horde.org/)
*
* See the enclosed file COPYING for license information (LGPL). If you
* did not receive this file, see http://www.horde.org/licenses/lgpl21.
*
* @category Kolab
* @package Kolab_Storage
* @author Gunnar Wrobel <wrobel@pardus.de>
* @license http://www.horde.org/licenses/lgpl21 LGPL 2.1
* @link http://pear.horde.org/index.php?package=Kolab_Storage
*/
class Horde_Kolab_Storage_Data_Cached
extends Horde_Kolab_Storage_Data_Base
{
/**
* The data cache.
*
* @var Horde_Kolab_Storage_Cache_Data
*/
private $_data_cache;
/**
* Has the cache already been loaded and validated?
*
* @var boolean
*/
private $_init = false;
/**
* Constructor.
*
* @param Horde_Kolab_Storage_Folder $folder The folder to retrieve the
* data from.
* @param Horde_Kolab_Storage_Driver $driver The primary connection driver.
* @param Horde_Kolab_Storage_Factory $factory The factory.
* @param Horde_Kolab_Storage_Cache $cache The cache storing data for
* this decorator.
* @param string $type The type of data we want to
* access in the folder.
* @param int $version Format version of the object
* data.
*/
public function __construct(Horde_Kolab_Storage_Folder $folder,
Horde_Kolab_Storage_Driver $driver,
Horde_Kolab_Storage_Factory $factory,
Horde_Kolab_Storage_Cache $cache,
$type = null,
$version = 1)
{
parent::__construct($folder, $driver, $factory, $type, $version);
$this->_data_cache = $cache->getDataCache($this->getIdParameters());
}
/**
* Check if the cache has been initialized.
*
* @return NULL
*/
private function _isInitialized()
{
return ($this->_init || $this->_data_cache->isInitialized());
}
/**
* Check if the cache has been initialized at all and synchronize it if not.
*
* @return NULL
*/
private function _init()
{
if (!$this->_isInitialized()) {
$this->synchronize();
}
}
/**
* Return the backend ID for the given object ID.
*
* @param string $object_uid The object ID.
*
* @return string The backend ID for the object.
*/
public function getBackendId($object_id)
{
$this->_init();
$mapping = $this->_data_cache->getObjectToBackend();
if (isset($mapping[$object_id])) {
return $mapping[$object_id];
} else {
throw new Horde_Kolab_Storage_Exception(
sprintf('Object ID %s does not exist!', $object_id)
);
}
}
/**
* Check if the given object ID exists.
*
* @param string $object_id The object ID.
*
* @return boolean True if the ID was found, false otherwise.
*/
public function objectIdExists($object_id)
{
$this->_init();
return array_key_exists(
$object_id, $this->_data_cache->getObjects()
);
}
/**
* Return the specified object.
*
* @param string $object_id The object id.
*
* @return array The object data as an array.
*/
public function getObject($object_id)
{
$this->_init();
$objects = $this->_data_cache->getObjects();
if (isset($objects[$object_id])) {
return $objects[$object_id];
} else {
throw new Horde_Kolab_Storage_Exception(
sprintf('Object ID %s does not exist!', $object_id)
);
}
}
/**
* Return the specified attachment.
*
* @param string $attachment_id The attachment id.
*
* @return resource An open stream to the attachment data.
*/
public function getAttachment($attachment_id)
{
//@todo
}
/**
* Retrieve all object ids in the current folder.
*
* @return array The object ids.
*/
public function getObjectIds()
{
$this->_init();
return array_keys($this->_data_cache->getObjects());
}
/**
* Retrieve all objects in the current folder.
*
* @return array An array of all objects.
*/
public function getObjects()
{
$this->_init();
return $this->_data_cache->getObjects();
}
/**
* Return the mapping of object IDs to backend IDs.
*
* @return array The object to backend mapping.
*/
public function getObjectToBackend()
{
$this->_init();
return $this->_data_cache->getObjectToBackend();
}
/**
* Retrieve the list of object duplicates.
*
* @return array The list of duplicates.
*/
public function getDuplicates()
{
$this->_init();
return $this->_data_cache->getDuplicates();
}
/**
* Retrieve the list of object errors.
*
* @return array The list of errors.
*/
public function getErrors()
{
$this->_init();
return $this->_data_cache->getErrors();
}
/**
* Synchronize the query data with the information from the backend.
*
* @param array $params Additional parameters.
*
* @return NULL
*/
public function synchronize($params = array())
{
$current = $this->getStamp();
if (!$this->_data_cache->isInitialized()) {
$this->_completeSynchronization($current);
return;
}
$previous = unserialize($this->_data_cache->getStamp());
if ($previous === false || $previous->isReset($current)) {
$this->_completeSynchronization($current);
return;
}
if (!isset($params['changes'])) {
$changes = $previous->getChanges($current);
$params['changes'][Horde_Kolab_Storage_Folder_Stamp::ADDED] = $this->fetch(
$changes[Horde_Kolab_Storage_Folder_Stamp::ADDED]
);
$params['changes'][Horde_Kolab_Storage_Folder_Stamp::DELETED] = $this->_data_cache->backendMap(
$changes[Horde_Kolab_Storage_Folder_Stamp::DELETED]
);
}
if ($params['changes'] !== false) {
$params['last_sync'] = $this->_data_cache->getLastSync();
$this->_data_cache->store(
$params['changes'][Horde_Kolab_Storage_Folder_Stamp::ADDED],
$current,
$this->getVersion(),
$params['changes'][Horde_Kolab_Storage_Folder_Stamp::DELETED]
);
$params['current_sync'] = $this->_data_cache->getLastSync();
parent::synchronize($params);
$this->_data_cache->save();
}
$this->_init = true;
}
/**
* Perform a complete synchronization.
*
* @param Horde_Kolab_Storage_Folder_Stamp $stamp The current stamp.
* @param array $params Additional parameters.
*
* @return NULL
*/
private function _completeSynchronization(Horde_Kolab_Storage_Folder_Stamp $stamp,
$params = array())
{
$this->_data_cache->reset();
$ids = $stamp->ids();
$params['last_sync'] = false;
$params['changes'][Horde_Kolab_Storage_Folder_Stamp::ADDED] = empty($ids) ? array() : $this->fetch($ids);
$this->_data_cache->store(
$params['changes'][Horde_Kolab_Storage_Folder_Stamp::ADDED],
$stamp,
$this->getVersion()
);
$params['current_sync'] = $this->_data_cache->getLastSync();
parent::synchronize($params);
$this->_data_cache->save();
}
}
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