function run()
{
$config = $this->config;
$context = $this->context;
/* @var $context ExecutionContext */
$write = function ($s) {
echo $s;
};
$writeln = function ($s) {
$d = new \DateTime();
echo $d->format(\DateTime::ISO8601) . ' ' . $s . "\n";
};
$c = $color = new \Colors\Color();
/* @var $c \Colors\Color */
$writeln($c('Running agent `' . $this->name)->bold() . '`');
// generate an array with handlers
$writeln('Loading handlers');
$handlers = [];
$handlersDir = $config->handlers_dir;
if ($handlersDir) {
$finder = new \Symfony\Component\Finder\Finder();
foreach ($finder->in($handlersDir)->name('*.php')->sortByName() as $file) {
/* @var $file \SplFileInfo */
$handlerId = $file->getBasename('.php');
$handler = (include $file);
$handlers[$handlerId] = $handler;
$writeln(' setting up handler ' . $color($handlerId)->bold() . $color->yellow(' (in ' . $file . ')'));
$eventName = SqsEvents::generateEventForAgentId(SqsEvents::EVENT_SQSAGENT_SQSMESSAGERECEIVED, $this->getId());
$context->getEventDispatcher()->addListener($eventName, function (\T24\Event\SqsMessageReceivedEvent $event) use($write, $writeln, $color, $handler, $handlerId, $eventName) {
$writeln($color->bg('blue', $color->white('invoking handler ' . $handlerId . ' for event ' . $eventName)));
/* @var Callable $handler */
$result = $handler($event);
// write comments
$comments = $event->getComments();
foreach ($comments as $comment) {
$writeln($color(' comment: ')->yellow() . $comment);
}
$writeln(' - handler ' . $handlerId . ' had been invoked.');
if ($event->isPropagationStopped()) {
$writeln(' - ' . $color->red('the event was stopped from further propagation.'));
} else {
$writeln(' - the event was not stopped. proceed to next handler');
}
return $result;
});
}
$writeln('Loaded ' . count($handlers) . ' handlers.');
} else {
$writeln('default handlers dir not specified, no handlers defined..');
}
// @todo: get aws params.
$region = '';
$sqsQueueUrl = '';
$sqs = SqsClient::factory(['region' => $config->aws_region, 'version' => '2012-11-05', 'credentials' => ['key' => $config->aws_key, 'secret' => $config->aws_secret]]);
// start the process
$ttl = (int) $config->ttl;
$ttl = min($ttl, 300);
$ttl = max($ttl, 5);
$sleep = (int) $config->sleep;
$sleep = min($sleep, $ttl - 5);
$sleep = max($sleep, 0);
$stopwatch = new \Symfony\Component\Stopwatch\Stopwatch();
$b = $stopwatch->start('loop');
while ($b->getDuration() < $ttl * 1000) {
// get an sqs message from the queue
$writeln($c('Polling Sqs for messages'));
$result = $sqs->receiveMessage(['QueueUrl' => $config->sqs_queue_url, 'AttributeNames' => ['All'], 'MessageAttributeNames' => ['All'], 'MaxNumberOfMessages' => 1]);
/* @var $result \Aws\Result */
if (!$result['Messages'] || $result['Messages'] == 0) {
$writeln($c('no messages found in sqs queue'));
} else {
$writeln($c(sprintf('%d message(s) retrieved from queue.', count($result['Messages']))));
foreach ($result['Messages'] as $message) {
// set up an event that the message is received.
// the default subscriber will pass the event to the event handlers in the handlers dir
$event = new SqsMessageReceivedEvent($context, $message);
$context->getEventDispatcher()->dispatch(SqsEvents::EVENT_SQSAGENT_SQSMESSAGERECEIVED, $event);
$context->getEventDispatcher()->dispatch(SqsEvents::generateEventForAgentId(SqsEvents::EVENT_SQSAGENT_SQSMESSAGERECEIVED, $this->getId()), $event);
/*
$context->getEventDispatcher()->dispatch(SqsEvents::EVENT_SQSAGENT_SQSMESSAGEHANDLED, $event2);
if ($event->isProcessed()) {
$context->getEventDispatcher()->dispatch(SqsEvents::EVENT_SQSAGENT_SQSMESSAGEPROCESSED, $event2);
}
*/
if ($event->getRemoveFromQueue()) {
$writeln(' - the event handlers indicate the sqs message should be removed from the queue.');
// remove from sqs
$sqsMessage = $event->getSqsMessage();
$removed = $sqs->deleteMessage(['QueueUrl' => $config->sqs_queue_url, 'ReceiptHandle' => $sqsMessage['ReceiptHandle']]);
$writeln(' - ' . ($removed ? $c->green('succesfully removed the message from SQS') : $c->red('failed to remove the message from SQS')));
} else {
$writeln(' - the event handlers indicate the sqs messageshould not be removed from the queue.');
}
}
}
$writeln($color->cyan('sleeping for ' . $sleep . ' seconds'));
sleep($sleep);
}
// end stopwatch while loop
$writeln('Stopped after ' . (int) ($b->getDuration() / 1000) . ' secs.');
// send the finish event.
$event = new \T24\Event\AgentEvent($context);
$context->getEventDispatcher()->dispatch(SqsEvents::EVENT_SQSAGENT_FINISH, $event);
$context->getEventDispatcher()->dispatch(SqsEvents::generateEventForAgentId(SqsEvents::EVENT_SQSAGENT_FINISH, $this->getId()), $event);
}
