forked from GNUsocial/gnu-social
58be61b641
queuectl.php --update -s<site> queuectl.php --stop queuectl.php --restart Default control channel is /topic/statusnet-control. For external utilities to send a site update ping direct to the queue server, connect via Stomp and send a message formatted thus: update:<nickname> (Nickname here, *not* server hostname! The rest of the queues will be updated to use nicknames later.) Note that all currently-connected queue daemons will get these notifications, including both queuedaemon.php and xmppdaemon.php. (XMPP will ignore site update requests for sites that it's not handling.) Limitations: * only implemented for stomp queue manager so far * --update may not yet handle a changed server name properly * --restart won't reload PHP code files that were already loaded at startup. Still need to stop and restart the daemons from 'outside' when updating code base.
308 lines
9.1 KiB
PHP
308 lines
9.1 KiB
PHP
<?php
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/**
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* StatusNet, the distributed open-source microblogging tool
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*
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* Abstract class for i/o managers
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*
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* PHP version 5
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*
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* LICENCE: This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* @category QueueManager
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* @package StatusNet
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* @author Evan Prodromou <evan@status.net>
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* @author Sarven Capadisli <csarven@status.net>
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* @author Brion Vibber <brion@status.net>
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* @copyright 2009-2010 StatusNet, Inc.
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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* @link http://status.net/
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*/
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/**
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* Completed child classes must implement the enqueue() method.
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*
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* For background processing, classes should implement either socket-based
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* input (handleInput(), getSockets()) or idle-loop polling (idle()).
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*/
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abstract class QueueManager extends IoManager
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{
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static $qm = null;
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public $master = null;
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public $handlers = array();
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public $groups = array();
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/**
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* Factory function to pull the appropriate QueueManager object
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* for this site's configuration. It can then be used to queue
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* events for later processing or to spawn a processing loop.
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*
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* Plugins can add to the built-in types by hooking StartNewQueueManager.
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*
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* @return QueueManager
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*/
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public static function get()
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{
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if (empty(self::$qm)) {
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if (Event::handle('StartNewQueueManager', array(&self::$qm))) {
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$enabled = common_config('queue', 'enabled');
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$type = common_config('queue', 'subsystem');
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if (!$enabled) {
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// does everything immediately
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self::$qm = new UnQueueManager();
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} else {
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switch ($type) {
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case 'db':
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self::$qm = new DBQueueManager();
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break;
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case 'stomp':
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self::$qm = new StompQueueManager();
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break;
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default:
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throw new ServerException("No queue manager class for type '$type'");
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}
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}
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}
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}
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return self::$qm;
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}
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/**
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* @fixme wouldn't necessarily work with other class types.
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* Better to change the interface...?
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*/
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public static function multiSite()
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{
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if (common_config('queue', 'subsystem') == 'stomp') {
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return IoManager::INSTANCE_PER_PROCESS;
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} else {
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return IoManager::SINGLE_ONLY;
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}
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}
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function __construct()
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{
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$this->initialize();
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}
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/**
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* Optional; ping any running queue handler daemons with a notification
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* such as announcing a new site to handle or requesting clean shutdown.
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* This avoids having to restart all the daemons manually to update configs
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* and such.
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*
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* Called from scripts/queuectl.php controller utility.
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*
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* @param string $event event key
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* @param string $param optional parameter to append to key
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* @return boolean success
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*/
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public function sendControlSignal($event, $param='')
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{
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throw new Exception(get_class($this) . " does not support control signals.");
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}
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/**
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* Store an object (usually/always a Notice) into the given queue
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* for later processing. No guarantee is made on when it will be
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* processed; it could be immediately or at some unspecified point
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* in the future.
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*
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* Must be implemented by any queue manager.
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*
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* @param Notice $object
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* @param string $queue
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*/
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abstract function enqueue($object, $queue);
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/**
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* Build a representation for an object for logging
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* @param mixed
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* @return string
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*/
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function logrep($object) {
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if (is_object($object)) {
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$class = get_class($object);
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if (isset($object->id)) {
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return "$class $object->id";
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}
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return $class;
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}
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if (is_string($object)) {
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$len = strlen($object);
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$fragment = mb_substr($object, 0, 32);
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if (mb_strlen($object) > 32) {
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$fragment .= '...';
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}
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return "string '$fragment' ($len bytes)";
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}
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return strval($object);
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}
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/**
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* Encode an object for queued storage.
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* Next gen may use serialization.
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*
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* @param mixed $object
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* @return string
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*/
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protected function encode($object)
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{
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if ($object instanceof Notice) {
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return $object->id;
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} else if (is_string($object)) {
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return $object;
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} else {
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throw new ServerException("Can't queue this type", 500);
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}
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}
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/**
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* Decode an object from queued storage.
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* Accepts back-compat notice reference entries and strings for now.
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*
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* @param string
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* @return mixed
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*/
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protected function decode($frame)
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{
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if (is_numeric($frame)) {
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return Notice::staticGet(intval($frame));
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} else {
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return $frame;
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}
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}
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/**
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* Instantiate the appropriate QueueHandler class for the given queue.
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*
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* @param string $queue
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* @return mixed QueueHandler or null
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*/
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function getHandler($queue)
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{
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if (isset($this->handlers[$queue])) {
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$class = $this->handlers[$queue];
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if (class_exists($class)) {
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return new $class();
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} else {
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common_log(LOG_ERR, "Nonexistent handler class '$class' for queue '$queue'");
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}
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} else {
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common_log(LOG_ERR, "Requested handler for unkown queue '$queue'");
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}
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return null;
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}
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/**
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* Get a list of registered queue transport names to be used
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* for this daemon.
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*
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* @return array of strings
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*/
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function getQueues()
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{
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$group = $this->activeGroup();
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return array_keys($this->groups[$group]);
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}
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/**
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* Initialize the list of queue handlers
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*
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* @event StartInitializeQueueManager
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* @event EndInitializeQueueManager
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*/
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function initialize()
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{
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// @fixme we'll want to be able to listen to particular queues...
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if (Event::handle('StartInitializeQueueManager', array($this))) {
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$this->connect('plugin', 'PluginQueueHandler');
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$this->connect('omb', 'OmbQueueHandler');
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$this->connect('ping', 'PingQueueHandler');
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$this->connect('distrib', 'DistribQueueHandler');
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if (common_config('sms', 'enabled')) {
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$this->connect('sms', 'SmsQueueHandler');
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}
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// XMPP output handlers...
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$this->connect('jabber', 'JabberQueueHandler');
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$this->connect('public', 'PublicQueueHandler');
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// @fixme this should get an actual queue
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//$this->connect('confirm', 'XmppConfirmHandler');
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// For compat with old plugins not registering their own handlers.
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$this->connect('plugin', 'PluginQueueHandler');
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$this->connect('xmppout', 'XmppOutQueueHandler', 'xmppdaemon');
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}
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Event::handle('EndInitializeQueueManager', array($this));
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}
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/**
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* Register a queue transport name and handler class for your plugin.
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* Only registered transports will be reliably picked up!
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*
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* @param string $transport
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* @param string $class
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* @param string $group
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*/
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public function connect($transport, $class, $group='queuedaemon')
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{
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$this->handlers[$transport] = $class;
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$this->groups[$group][$transport] = $class;
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}
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/**
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* @return string queue group to use for this request
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*/
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function activeGroup()
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{
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$group = 'queuedaemon';
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if ($this->master) {
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// hack hack
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if ($this->master instanceof XmppMaster) {
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return 'xmppdaemon';
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}
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}
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return $group;
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}
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/**
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* Send a statistic ping to the queue monitoring system,
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* optionally with a per-queue id.
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*
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* @param string $key
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* @param string $queue
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*/
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function stats($key, $queue=false)
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{
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$owners = array();
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if ($queue) {
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$owners[] = "queue:$queue";
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$owners[] = "site:" . common_config('site', 'server');
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}
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if (isset($this->master)) {
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$this->master->stats($key, $owners);
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} else {
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$monitor = new QueueMonitor();
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$monitor->stats($key, $owners);
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}
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}
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}
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