/**
* Gets the current queue from the Memcache server.
*
* @param boolean $exclusive If set to true, this will lock all processes from querying the queue.
* @return \SplQueue
*/
public function getQueue($exclusive = false)
{
if ($this->locked) {
return $this->queue;
}
//If the 'add' operation fails, it means the lock is already active.
if ($this->memcache->add('queue.manager.lock', true)) {
$queue = $this->memcache->get('queue.manager');
if ($queue) {
$this->queue = unserialize($queue);
}
if (!$queue) {
$this->queue = new \SplQueue();
}
$this->locked = true;
} else {
$interval = $this->memcache->get('queue.process.interval');
$this->eventDispatcher->dispatch('queue.manager.retrieved', new ManagerRetrievedEvent(ManagerRetrievedEvent::RETRIEVAL_STATUS_FAILED_LOCKED));
//Wait for the lock to be released.
while ($this->memcache->get('queue.manager.lock')) {
usleep($interval * 1000 * 1000);
}
$this->queue = unserialize($this->memcache->get('queue.manager'));
$this->locked = true;
}
if (!$exclusive) {
$this->memcache->delete('queue.manager.lock');
$this->locked = false;
}
return $this->queue;
}
/**
* @param $sObjectType
* @param $id
* @param bool $refresh
*
* @return array|bool|mixed|\Phpforce\SoapClient\Result\SObject[]|\Traversable|void
*/
public function get($sObjectType, $id, $refresh = false)
{
$fields = false;
$object = false;
if (!$refresh) {
$object = $this->memcached->get('salesforce.object.' . $id);
}
if (!$object) {
// Get fields from memcache
if (!$refresh) {
$fields = $this->memcached->get('salesforce.objectFields.' . $sObjectType);
}
try {
// If no data, ask Salesforce and save to memcached.
if (!$fields) {
$obj = $this->soapClient->call('describeSObject', array('sObjectType' => $sObjectType));
$fields = array();
foreach ($obj->getFields() as $field) {
$fields[] = $field->getName();
}
$this->memcached->set('salesforce.objectFields.' . $sObjectType, $fields, $this->memcached_ttl);
}
// TODO: Log Salesforce Query and Result
$object = $this->soapClient->retrieve($fields, array($id), $sObjectType);
$object = $object[0];
// Set Memcached
$this->memcached->set('salesforce.object.' . $id, $object, $this->memcached_ttl);
} catch (\Exception $e) {
}
}
return $object;
}
/**
* Checks if the Queue Manager is already running in a different process.
*
* @TODO: This is not using the ->add() atomic operation, so it will fail the concurrency checks. Fix this.
* @return bool If the manager is running in another process.
*/
public function checkServer()
{
if (!$this->memcache->add('queue.lock', getmypid())) {
$pid = $this->memcache->get('queue.lock');
if ($this->isQueueRunning($pid)) {
return true;
} else {
$this->memcache->delete('queue.lock');
return $this->checkServer();
}
}
return false;
}
