forked from GNUsocial/gnu-social
26fdf0c9d2
Queue handlers for XMPP individual & firehose output now send their XML stanzas to another output queue instead of connecting directly to the chat server. This lets us have as many general processing threads as we need, while all actual XMPP input and output go through a single daemon with a single connection open. This avoids problems with multiple connected resources: * multiple windows shown in some chat clients (psi, gajim, kopete) * extra load on server * incoming message delivery forwarding issues Database changes: * queue_item drops 'notice_id' in favor of a 'frame' blob. This is based on Craig Andrews' work branch to generalize queues to take any object, but conservatively leaving out the serialization for now. Table updater (preserves any existing queued items) in db/rc3to09.sql Code changes to watch out for: * Queue handlers should now define a handle() method instead of handle_notice() * QueueDaemon and XmppDaemon now share common i/o (IoMaster) and respawning thread management (RespawningDaemon) infrastructure. * The polling XmppConfirmManager has been dropped, as the message is queued directly when saving IM settings. * Enable $config['queue']['debug_memory'] to output current memory usage at each run through the event loop to watch for memory leaks To do: * Adapt XMPP i/o to component connection mode for multi-site support. * XMPP input can also be broken out to a queue, which would allow the actual notice save etc to be handled by general queue threads. * Make sure there are no problems with simply pushing serialized Notice objects to queues. * Find a way to improve interactive performance of the database-backed queue handler; polling is pretty painful to XMPP. * Possibly redo the way QueueHandlers are injected into a QueueManager. The grouping used to split out the XMPP output queue is a bit awkward.
69 lines
2.0 KiB
PHP
69 lines
2.0 KiB
PHP
<?php
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/*
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* StatusNet - the distributed open-source microblogging tool
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* Copyright (C) 2008, 2009, StatusNet, Inc.
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*
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* 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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if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }
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/**
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* Base class for queue handlers.
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*
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* As of 0.9, queue handlers are short-lived for items as they are
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* dequeued by a QueueManager running in an IoMaster in a daemon
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* such as queuedaemon.php.
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*
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* Extensions requiring long-running maintenance or polling should
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* register an IoManager.
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*
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* Subclasses must override at least the following methods:
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* - transport
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* - handle
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*/
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class QueueHandler
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{
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/**
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* Return transport keyword which identifies items this queue handler
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* services; must be defined for all subclasses.
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*
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* Must be 8 characters or less to fit in the queue_item database.
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* ex "email", "jabber", "sms", "irc", ...
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*
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* @return string
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*/
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function transport()
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{
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return null;
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}
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/**
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* Here's the meat of your queue handler -- you're handed a Notice
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* or other object, which you may do as you will with.
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*
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* If this function indicates failure, a warning will be logged
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* and the item is placed back in the queue to be re-run.
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*
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* @param mixed $object
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* @return boolean true on success, false on failure
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*/
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function handle($object)
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{
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return true;
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}
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}
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