diff options
Diffstat (limited to 'lib/stompqueuemanager.php')
| -rw-r--r-- | lib/stompqueuemanager.php | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/lib/stompqueuemanager.php b/lib/stompqueuemanager.php new file mode 100644 index 000000000..badcd4abb --- /dev/null +++ b/lib/stompqueuemanager.php @@ -0,0 +1,163 @@ +<?php +/** + * Laconica, the distributed open-source microblogging tool + * + * Abstract class for queue managers + * + * PHP version 5 + * + * LICENCE: This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + * @category QueueManager + * @package Laconica + * @author Evan Prodromou <evan@controlyourself.ca> + * @author Sarven Capadisli <csarven@controlyourself.ca> + * @copyright 2009 Control Yourself, Inc. + * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0 + * @link http://laconi.ca/ + */ + +require_once 'Stomp.php'; + +class StompQueueManager +{ + var $server = null; + var $username = null; + var $password = null; + var $base = null; + var $con = null; + var $frames = array(); + + function __construct() + { + $this->server = common_config('queue', 'stomp_server'); + $this->username = common_config('queue', 'stomp_username'); + $this->password = common_config('queue', 'stomp_password'); + $this->base = common_config('queue', 'queue_basename'); + } + + function _connect() + { + if (empty($this->con)) { + $this->con = new Stomp($this->server); + + if (!$this->con->connect($this->username, $this->password)) { + $this->_log(LOG_ERR, 'Failed to connect to queue server'); + throw new ServerException('Failed to connect to queue server'); + } + } + } + + function enqueue($object, $queue) + { + $notice = $object; + + $this->_connect(); + + // XXX: serialize and send entire notice + + $result = $this->con->send($this->_queueName($queue), + $notice->id, // BODY of the message + array ('created' => $notice->created)); + + if (!$result) { + common_log(LOG_ERR, 'Error sending to '.$transport.' queue'); + return false; + } + + common_log(LOG_DEBUG, 'complete remote queueing notice ID = ' + . $notice->id . ' for ' . $transport); + } + + function nextItem($queue, $timeout=null) + { + $result = null; + + $this->_connect(); + + $frame = $this->con->readFrame(); + + if ($frame) { + $this->log(LOG_INFO, 'Got item enqueued '.common_exact_date($frame->headers['created'])); + + // XXX: Now the queue handler receives only the ID of the + // notice, and it has to get it from the DB + // A massive improvement would be avoid DB query by transmitting + // all the notice details via queue server... + + $notice = Notice::staticGet($frame->body); + + if ($notice) { + $this->_saveFrame($notice, $queue, $frame); + } else { + $this->log(LOG_WARNING, 'queue item for notice that does not exist'); + } + } + } + + function done($object, $queue) + { + $notice = $object; + + $this->_connect(); + + $frame = $this->_getFrame($notice, $queue); + + if (empty($frame)) { + $this->log(LOG_ERR, 'Cannot find frame for notice '.$notice->id.' in queue '.$queue); + } else { + // if the msg has been handled positively, ack it + // and the queue server will remove it from the queue + $this->con->ack($frame); + $this->_clearFrame($notice, $queue); + + $this->log(LOG_INFO, 'finished broadcasting notice ID = ' . $notice->id); + } + } + + function fail($object, $queue) + { + $notice = $object; + + // STOMP server will requeue it after a while anyways, + // so no need to notify. Just get it out of our little + // array + + $this->_clearFrame($notice, $queue); + } + + function _frameKey($notice, $queue) + { + return ((string)$notice->id) . '-' . $queue; + } + + function _saveFrame($notice, $queue, $frame) + { + $k = $this->_frameKey($notice, $queue); + $this->_frames[$k] = $frame; + return true; + } + + function _getFrame($notice, $queue) + { + $k = $this->_frameKey($notice, $queue); + return $this->_frames[$k]; + } + + function _clearFrame($notice, $queue) + { + $k = $this->_frameKey($notice, $queue); + unset($this->_frames[$k]); + } +} |