/**
* {@inheritDoc}
*/
public function createCurrentProcess()
{
$process = new Process();
$process->setPidFromCurrentProcess();
return $process;
}
/**
* Work
*
* The primary loop for a worker which when called on an instance starts
* the worker's life cycle.
*
* Queues are checked every $interval (seconds) for new jobs.
*
* @param int $interval How often to check for new jobs across the queues. @todo remove, use setInterval or similar
*/
public function work($interval = 3)
{
$this->startup();
while (true) {
if ($this->shutdown) {
break;
}
$this->getProcess()->dispatchSignals();
if ($this->paused) {
$this->getProcess()->setTitle('Paused');
if ($interval == 0) {
break;
}
usleep($interval * 1000000);
continue;
}
try {
$job = $this->reserve();
} catch (\Exception $ex) {
$this->getLogger()->error('Failed to reserve due to exception "{message}", skipping', array('message' => $ex->getMessage()));
continue;
}
if (null === $job) {
// For an interval of 0, break now - helps with unit testing etc
// @todo replace with some method, which can be mocked... an interval of 0 should be considered valid
if ($interval == 0) {
break;
}
$this->eventDispatcher->dispatch(ResqueWorkerEvents::WAIT_NO_JOB, new WorkerEvent($this));
$this->getProcess()->setTitle('Waiting for ' . implode(',', $this->queues));
$this->getLogger()->debug('Sleeping for {seconds}s, no jobs on {queues}', array('queues' => implode(', ', array_map(function ($a) {
return $a->getName();
}, $this->getQueues())), 'seconds' => $interval));
sleep($interval);
continue;
}
$this->getLogger()->notice('Starting work on {job}', array('job' => $job));
if ($job instanceof TrackableJobInterface) {
$job->setState(JobInterface::STATE_PERFORMING);
}
$this->setCurrentJob($job);
if ($this->fork) {
$this->eventDispatcher->dispatch(ResqueWorkerEvents::BEFORE_FORK_TO_PERFORM, new WorkerJobEvent($this, $job));
$this->childProcess = $this->getProcess()->fork();
if (null === $this->childProcess) {
// This is child process, it will perform the job and then die.
$this->eventDispatcher->dispatch(ResqueWorkerEvents::AFTER_FORK_TO_PERFORM, new WorkerJobEvent($this, $job));
// @todo do not construct Process here.
$child = new Process();
$child->setPidFromCurrentProcess();
$this->setProcess($child);
$this->perform($job);
exit(0);
} else {
// This is the parent.
$title = 'Forked ' . $this->childProcess->getPid() . ' at ' . date('c');
$this->getProcess()->setTitle($title);
$this->getLogger()->debug($title);
// Wait until the child process finishes before continuing.
$this->childProcess->wait();
if (false === $this->childProcess->isCleanExit()) {
$exception = new DirtyExitException('Job dirty exited with code ' . $this->childProcess->getExitCode());
$this->handleFailedJob($job, $exception);
}
}
// Child should be dead by now.
$this->childProcess = null;
} else {
$this->perform($job);
}
$this->workComplete($job);
}
}
