diff options
Diffstat (limited to 'lib/stompqueuemanager.php')
| -rw-r--r-- | lib/stompqueuemanager.php | 286 |
1 files changed, 214 insertions, 72 deletions
diff --git a/lib/stompqueuemanager.php b/lib/stompqueuemanager.php index f059b42f0..3090e0bfb 100644 --- a/lib/stompqueuemanager.php +++ b/lib/stompqueuemanager.php @@ -30,46 +30,53 @@ require_once 'Stomp.php'; -class LiberalStomp extends Stomp -{ - function getSocket() - { - return $this->_socket; - } -} -class StompQueueManager +class StompQueueManager extends QueueManager { var $server = null; var $username = null; var $password = null; var $base = null; var $con = null; + + protected $master = null; + protected $sites = array(); function __construct() { + parent::__construct(); $this->server = common_config('queue', 'stomp_server'); $this->username = common_config('queue', 'stomp_username'); $this->password = common_config('queue', 'stomp_password'); $this->base = common_config('queue', 'queue_basename'); } - function _connect() + /** + * Tell the i/o master we only need a single instance to cover + * all sites running in this process. + */ + public static function multiSite() { - if (empty($this->con)) { - $this->_log(LOG_INFO, "Connecting to '$this->server' as '$this->username'..."); - $this->con = new LiberalStomp($this->server); + return IoManager::INSTANCE_PER_PROCESS; + } - if ($this->con->connect($this->username, $this->password)) { - $this->_log(LOG_INFO, "Connected."); - } else { - $this->_log(LOG_ERR, 'Failed to connect to queue server'); - throw new ServerException('Failed to connect to queue server'); - } - } + /** + * Record each site we'll be handling input for in this process, + * so we can listen to the necessary queues for it. + * + * @fixme possibly actually do subscription here to save another + * loop over all sites later? + */ + public function addSite($server) + { + $this->sites[] = $server; } - function enqueue($object, $queue) + /** + * Saves a notice object reference into the queue item table. + * @return boolean true on success + */ + public function enqueue($object, $queue) { $notice = $object; @@ -77,7 +84,7 @@ class StompQueueManager // XXX: serialize and send entire notice - $result = $this->con->send($this->_queueName($queue), + $result = $this->con->send($this->queueName($queue), $notice->id, // BODY of the message array ('created' => $notice->created)); @@ -88,78 +95,212 @@ class StompQueueManager common_log(LOG_DEBUG, 'complete remote queueing notice ID = ' . $notice->id . ' for ' . $queue); + $this->stats('enqueued', $queue); } - function service($queue, $handler) + /** + * Send any sockets we're listening on to the IO manager + * to wait for input. + * + * @return array of resources + */ + public function getSockets() { - $result = null; - - $this->_connect(); + return array($this->con->getSocket()); + } - $this->con->setReadTimeout($handler->timeout()); + /** + * We've got input to handle on our socket! + * Read any waiting Stomp frame(s) and process them. + * + * @param resource $socket + * @return boolean ok on success + */ + public function handleInput($socket) + { + assert($socket === $this->con->getSocket()); + $ok = true; + $frames = $this->con->readFrames(); + foreach ($frames as $frame) { + $ok = $ok && $this->_handleNotice($frame); + } + return $ok; + } - $this->con->subscribe($this->_queueName($queue)); + /** + * Initialize our connection and subscribe to all the queues + * we're going to need to handle... + * + * Side effects: in multi-site mode, may reset site configuration. + * + * @param IoMaster $master process/event controller + * @return bool return false on failure + */ + public function start($master) + { + parent::start($master); + if ($this->sites) { + foreach ($this->sites as $server) { + StatusNet::init($server); + $this->doSubscribe(); + } + } else { + $this->doSubscribe(); + } + return true; + } + + /** + * Subscribe to all the queues we're going to need to handle... + * + * Side effects: in multi-site mode, may reset site configuration. + * + * @return bool return false on failure + */ + public function finish() + { + if ($this->sites) { + foreach ($this->sites as $server) { + StatusNet::init($server); + $this->doUnsubscribe(); + } + } else { + $this->doUnsubscribe(); + } + return true; + } + + /** + * Lazy open connection to Stomp queue server. + */ + protected function _connect() + { + if (empty($this->con)) { + $this->_log(LOG_INFO, "Connecting to '$this->server' as '$this->username'..."); + $this->con = new LiberalStomp($this->server); - while (true) { + if ($this->con->connect($this->username, $this->password)) { + $this->_log(LOG_INFO, "Connected."); + } else { + $this->_log(LOG_ERR, 'Failed to connect to queue server'); + throw new ServerException('Failed to connect to queue server'); + } + } + } - // Wait for something on one of our sockets + /** + * Subscribe to all enabled notice queues for the current site. + */ + protected function doSubscribe() + { + $this->_connect(); + foreach ($this->getQueues() as $queue) { + $rawqueue = $this->queueName($queue); + $this->_log(LOG_INFO, "Subscribing to $rawqueue"); + $this->con->subscribe($rawqueue); + } + } + + /** + * Subscribe from all enabled notice queues for the current site. + */ + protected function doUnsubscribe() + { + $this->_connect(); + foreach ($this->getQueues() as $queue) { + $this->con->unsubscribe($this->queueName($queue)); + } + } - $stompsock = $this->con->getSocket(); + /** + * Handle and acknowledge a notice event that's come in through a queue. + * + * If the queue handler reports failure, the message is requeued for later. + * Missing notices or handler classes will drop the message. + * + * Side effects: in multi-site mode, may reset site configuration to + * match the site that queued the event. + * + * @param StompFrame $frame + * @return bool + */ + protected function _handleNotice($frame) + { + list($site, $queue) = $this->parseDestination($frame->headers['destination']); + if ($site != common_config('site', 'server')) { + $this->stats('switch'); + StatusNet::init($site); + } - $handsocks = $handler->getSockets(); + $id = intval($frame->body); + $info = "notice $id posted at {$frame->headers['created']} in queue $queue"; - $socks = array_merge(array($stompsock), $handsocks); + $notice = Notice::staticGet('id', $id); + if (empty($notice)) { + $this->_log(LOG_WARNING, "Skipping missing $info"); + $this->con->ack($frame); + $this->stats('badnotice', $queue); + return false; + } - $read = $socks; - $write = array(); - $except = array(); + $handler = $this->getHandler($queue); + if (!$handler) { + $this->_log(LOG_ERROR, "Missing handler class; skipping $info"); + $this->con->ack($frame); + $this->stats('badhandler', $queue); + return false; + } - $ready = stream_select($read, $write, $except, $handler->timeout(), 0); + $ok = $handler->handle_notice($notice); - if ($ready === false) { - $this->_log(LOG_ERR, "Error selecting on sockets"); - } else if ($ready > 0) { - if (in_array($stompsock, $read)) { - $this->_handleNotice($queue, $handler); - } - $handler->idle(QUEUE_HANDLER_HIT_IDLE); - } + if (!$ok) { + $this->_log(LOG_WARNING, "Failed handling $info"); + // FIXME we probably shouldn't have to do + // this kind of queue management ourselves; + // if we don't ack, it should resend... + $this->con->ack($frame); + $this->enqueue($notice, $queue); + $this->stats('requeued', $queue); + return false; } - $this->con->unsubscribe($this->_queueName($queue)); + $this->_log(LOG_INFO, "Successfully handled $info"); + $this->con->ack($frame); + $this->stats('handled', $queue); + return true; } - function _handleNotice($queue, $handler) + /** + * Combines the queue_basename from configuration with the + * site server name and queue name to give eg: + * + * /queue/statusnet/identi.ca/sms + * + * @param string $queue + * @return string + */ + protected function queueName($queue) { - $frame = $this->con->readFrame(); - - if (!empty($frame)) { - $notice = Notice::staticGet('id', $frame->body); - - if (empty($notice)) { - $this->_log(LOG_WARNING, 'Got ID '. $frame->body .' for non-existent notice in queue '. $queue); - $this->con->ack($frame); - } else { - if ($handler->handle_notice($notice)) { - $this->_log(LOG_INFO, 'Successfully handled notice '. $notice->id .' posted at ' . $frame->headers['created'] . ' in queue '. $queue); - $this->con->ack($frame); - } else { - $this->_log(LOG_WARNING, 'Failed handling notice '. $notice->id .' posted at ' . $frame->headers['created'] . ' in queue '. $queue); - // FIXME we probably shouldn't have to do - // this kind of queue management ourselves - $this->con->ack($frame); - $this->enqueue($notice, $queue); - } - unset($notice); - } - - unset($frame); - } + return common_config('queue', 'queue_basename') . + common_config('site', 'server') . '/' . $queue; } - function _queueName($queue) + /** + * Returns the site and queue name from the server-side queue. + * + * @param string queue destination (eg '/queue/statusnet/identi.ca/sms') + * @return array of site and queue: ('identi.ca','sms') or false if unrecognized + */ + protected function parseDestination($dest) { - return common_config('queue', 'queue_basename') . $queue; + $prefix = common_config('queue', 'queue_basename'); + if (substr($dest, 0, strlen($prefix)) == $prefix) { + $rest = substr($dest, strlen($prefix)); + return explode("/", $rest, 2); + } else { + common_log(LOG_ERR, "Got a message from unrecognized stomp queue: $dest"); + return array(false, false); + } } function _log($level, $msg) @@ -167,3 +308,4 @@ class StompQueueManager common_log($level, 'StompQueueManager: '.$msg); } } + |