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Any object (not just Notice's) can be queued

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This commit is contained in:
Craig Andrews
2010-01-20 16:31:48 -05:00
parent 6a93cb2985
commit 77ea02cac3
19 changed files with 109 additions and 291 deletions
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95
lib/dbqueuemanager.php
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@@ -31,19 +31,17 @@
class DBQueueManager extends QueueManager
{
/**
* Saves a notice object reference into the queue item table.
* Saves an object into the queue item table.
* @return boolean true on success
* @throws ServerException on failure
*/
public function enqueue($object, $queue)
{
$notice = $object;
$qi = new Queue_item();
$qi->notice_id = $notice->id;
$qi->frame = serialize($object);
$qi->transport = $queue;
$qi->created = $notice->created;
$qi->created = common_sql_now();
$result = $qi->insert();
if (!$result) {
@@ -73,34 +71,35 @@ class DBQueueManager extends QueueManager
*/
public function poll()
{
$this->_log(LOG_DEBUG, 'Checking for notices...');
$item = $this->_nextItem();
if ($item === false) {
$this->_log(LOG_DEBUG, 'No notices waiting; idling.');
$this->_log(LOG_DEBUG, 'Checking for queued objects...');
$qi = $this->_nextItem();
if ($qi === false) {
$this->_log(LOG_DEBUG, 'No queue items waiting; idling.');
return false;
}
if ($item === true) {
// We dequeued an entry for a deleted or invalid notice.
if ($qi === true) {
// We dequeued an entry for a deleted or invalid object.
// Consider it a hit for poll rate purposes.
return true;
}
list($queue, $notice) = $item;
$this->_log(LOG_INFO, 'Got notice '. $notice->id . ' for transport ' . $queue);
$queue = $qi->transport;
$object = unserialize($qi->frame);
$this->_log(LOG_INFO, 'Got item id=' . $qi->id . ' for transport ' . $queue);
// Yay! Got one!
$handler = $this->getHandler($queue);
if ($handler) {
if ($handler->handle_notice($notice)) {
$this->_log(LOG_INFO, "[$queue:notice $notice->id] Successfully handled notice");
$this->_done($notice, $queue);
if ($handler->handle($object)) {
$this->_log(LOG_INFO, "[$queue] Successfully handled object");
$this->_done($qi);
} else {
$this->_log(LOG_INFO, "[$queue:notice $notice->id] Failed to handle notice");
$this->_fail($notice, $queue);
$this->_log(LOG_INFO, "[$queue] Failed to handle object");
$this->_fail($qi);
}
} else {
$this->_log(LOG_INFO, "[$queue:notice $notice->id] No handler for queue $queue; discarding.");
$this->_done($notice, $queue);
$this->_log(LOG_INFO, "[$queue] No handler for queue $queue; discarding.");
$this->_done($qi);
}
return true;
}
@@ -108,8 +107,7 @@ class DBQueueManager extends QueueManager
/**
* Pop the oldest unclaimed item off the queue set and claim it.
*
* @return mixed false if no items; true if bogus hit; otherwise array(string, Notice)
* giving the queue transport name.
* @return mixed false if no items; true if bogus hit; otherwise Queue_item
*/
protected function _nextItem()
{
@@ -121,70 +119,42 @@ class DBQueueManager extends QueueManager
return false;
}
$queue = $qi->transport;
$notice = Notice::staticGet('id', $qi->notice_id);
if (empty($notice)) {
$this->_log(LOG_INFO, "[$queue:notice $notice->id] dequeued non-existent notice");
$qi->delete();
return true;
}
$result = $notice;
return array($queue, $notice);
return $qi;
}
/**
* Delete our claimed item from the queue after successful processing.
*
* @param Notice $object
* @param string $queue
* @param QueueItem $qi
*/
protected function _done($object, $queue)
protected function _done($qi)
{
// XXX: right now, we only handle notices
$notice = $object;
$qi = Queue_item::pkeyGet(array('notice_id' => $notice->id,
'transport' => $queue));
if (empty($qi)) {
$this->_log(LOG_INFO, "[$queue:notice $notice->id] Cannot find queue item");
$this->_log(LOG_INFO, "_done passed an empty queue item");
} else {
if (empty($qi->claimed)) {
$this->_log(LOG_WARNING, "[$queue:notice $notice->id] Reluctantly releasing unclaimed queue item");
$this->_log(LOG_WARNING, "Reluctantly releasing unclaimed queue item");
}
$qi->delete();
$qi->free();
}
$this->_log(LOG_INFO, "[$queue:notice $notice->id] done with item");
$this->stats('handled', $queue);
$notice->free();
$this->_log(LOG_INFO, "done with item");
}
/**
* Free our claimed queue item for later reprocessing in case of
* temporary failure.
*
* @param Notice $object
* @param string $queue
* @param QueueItem $qi
*/
protected function _fail($object, $queue)
protected function _fail($qi)
{
// XXX: right now, we only handle notices
$notice = $object;
$qi = Queue_item::pkeyGet(array('notice_id' => $notice->id,
'transport' => $queue));
if (empty($qi)) {
$this->_log(LOG_INFO, "[$queue:notice $notice->id] Cannot find queue item");
$this->_log(LOG_INFO, "_fail passed an empty queue item");
} else {
if (empty($qi->claimed)) {
$this->_log(LOG_WARNING, "[$queue:notice $notice->id] Ignoring failure for unclaimed queue item");
$this->_log(LOG_WARNING, "Ignoring failure for unclaimed queue item");
} else {
$orig = clone($qi);
$qi->claimed = null;
@@ -193,10 +163,7 @@ class DBQueueManager extends QueueManager
}
}
$this->_log(LOG_INFO, "[$queue:notice $notice->id] done with queue item");
$this->stats('error', $queue);
$notice->free();
$this->_log(LOG_INFO, "done with queue item");
}
protected function _log($level, $msg)