/**
* Checks for the stop condition of this strategy
*
* @param WorkerEvent $event
* @return string
*/
public function onStopConditionCheck(WorkerEvent $event)
{
if ($this->interrupted) {
$event->exitWorkerLoop();
$this->state = sprintf("interrupt by an external signal on '%s'", $event->getName());
}
}
/**
* @param WorkerEvent $event
* @return void
*/
public function onStopConditionCheck(WorkerEvent $event)
{
if ($event->getName() == WorkerEvent::EVENT_PROCESS_IDLE) {
if ($this->previousIdlingTime + $this->idleThrottleTime > microtime(true)) {
return;
} else {
$this->previousIdlingTime = microtime(true);
}
}
if (!count($this->files)) {
$this->constructFileList();
$this->state = sprintf("watching %s files for modifications", count($this->files));
}
foreach ($this->files as $checksum => $file) {
if (!file_exists($file) || !is_readable($file) || (string) $checksum !== hash_file('crc32', $file)) {
$event->exitWorkerLoop();
$this->state = sprintf("file modification detected for '%s'", $file);
}
}
}
/**
* Callback facilitating the worker loop
*
* It simulates a process queue strategy. And triggers an idle event on every uneven invokation of the PROCESS event
*
* @param WorkerEvent $e
*/
public function callbackWorkerLoopEvents(WorkerEvent $e)
{
if (!isset($this->actualCalled[$e->getName()])) {
$this->actualCalled[$e->getName()] = 1;
} else {
$this->actualCalled[$e->getName()]++;
}
// mark for exit when event is due
if ($e->getName() == $this->exitedBy && $this->actualCalled[$e->getName()] >= $this->exitAfter) {
$e->exitWorkerLoop();
}
// simulate process queue strategy, trigger idle event on every uneven call
if ($e->getName() == WorkerEvent::EVENT_PROCESS_QUEUE) {
if (!($this->actualCalled[WorkerEvent::EVENT_PROCESS_QUEUE] % 2)) {
$e->getTarget()->getEventManager()->trigger(WorkerEvent::EVENT_PROCESS_IDLE, $e);
$e->stopPropagation();
return;
}
}
}
