gnu-social/lib/xmppmanager.php

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Major refactoring of queue handlers to support running multiple sites in one daemon. Key changes: * Initialization code moved from common.php to StatusNet class; can now switch configurations during runtime. * As a consequence, configuration files must now be idempotent... Be careful with constant, function or class definitions. * Control structure for daemons/QueueManager/QueueHandler has been refactored; the run loop is now managed by IoMaster run via scripts/queuedaemon.php IoManager subclasses are woken to handle socket input or polling, and may cover multiple sites. * Plugins can implement notice queue handlers more easily by registering a QueueHandler class; no more need to add a daemon. The new QueueDaemon runs from scripts/queuedaemon.php: * This replaces most of the old *handler.php scripts; they've been refactored to the bare handler classes. * Spawns multiple child processes to spread load; defaults to CPU count on Linux and Mac OS X systems, or override with --threads=N * When multithreaded, child processes are automatically respawned on failure. * Threads gracefully shut down and restart when passing a soft memory limit (defaults to 90% of memory_limit), limiting damage from memory leaks. * Support for UDP-based monitoring: http://www.gitorious.org/snqmon Rough control flow diagram: QueueDaemon -> IoMaster -> IoManager QueueManager [listen or poll] -> QueueHandler XmppManager [ping & keepalive] XmppConfirmManager [poll updates] Todo: * Respawning features not currently available running single-threaded. * When running single-site, configuration changes aren't picked up. * New sites or config changes affecting queue subscriptions are not yet handled without a daemon restart. * SNMP monitoring output to integrate with general tools (nagios, ganglia) * Convert XMPP confirmation message sends to use stomp queue instead of polling * Convert xmppdaemon.php to IoManager? * Convert Twitter status, friends import polling daemons to IoManager * Clean up some error reporting and failure modes * May need to adjust queue priorities for best perf in backlog/flood cases Detailed code history available in my daemon-work branch: http://www.gitorious.org/~brion/statusnet/brion-fixes/commits/daemon-work
2010-01-13 12:57:15 +09:00
<?php
/*
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2008, 2009, StatusNet, Inc.
*
* 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/>.
*/
if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }
/**
* XMPP background connection manager for XMPP-using queue handlers,
* allowing them to send outgoing messages on the right connection.
*
* Input is handled during socket select loop, keepalive pings during idle.
* Any incoming messages will be forwarded to the main XmppDaemon process,
* which handles direct user interaction.
*
* In a multi-site queuedaemon.php run, one connection will be instantiated
* for each site being handled by the current process that has XMPP enabled.
*/
class XmppManager extends IoManager
{
protected $site = null;
protected $pingid = 0;
protected $lastping = null;
static protected $singletons = array();
const PING_INTERVAL = 120;
/**
* Fetch the singleton XmppManager for the current site.
* @return mixed XmppManager, or false if unneeded
*/
public static function get()
{
if (common_config('xmpp', 'enabled')) {
$site = common_config('site', 'server');
if (empty(self::$singletons[$site])) {
self::$singletons[$site] = new XmppManager();
}
return self::$singletons[$site];
} else {
return false;
}
}
/**
* Tell the i/o master we need one instance for each supporting site
* being handled in this process.
*/
public static function multiSite()
{
return IoManager::INSTANCE_PER_SITE;
}
function __construct()
{
$this->site = common_config('site', 'server');
}
/**
* Initialize connection to server.
* @return boolean true on success
*/
public function start($master)
{
parent::start($master);
$this->switchSite();
require_once INSTALLDIR . "/lib/jabber.php";
Major refactoring of queue handlers to support running multiple sites in one daemon. Key changes: * Initialization code moved from common.php to StatusNet class; can now switch configurations during runtime. * As a consequence, configuration files must now be idempotent... Be careful with constant, function or class definitions. * Control structure for daemons/QueueManager/QueueHandler has been refactored; the run loop is now managed by IoMaster run via scripts/queuedaemon.php IoManager subclasses are woken to handle socket input or polling, and may cover multiple sites. * Plugins can implement notice queue handlers more easily by registering a QueueHandler class; no more need to add a daemon. The new QueueDaemon runs from scripts/queuedaemon.php: * This replaces most of the old *handler.php scripts; they've been refactored to the bare handler classes. * Spawns multiple child processes to spread load; defaults to CPU count on Linux and Mac OS X systems, or override with --threads=N * When multithreaded, child processes are automatically respawned on failure. * Threads gracefully shut down and restart when passing a soft memory limit (defaults to 90% of memory_limit), limiting damage from memory leaks. * Support for UDP-based monitoring: http://www.gitorious.org/snqmon Rough control flow diagram: QueueDaemon -> IoMaster -> IoManager QueueManager [listen or poll] -> QueueHandler XmppManager [ping & keepalive] XmppConfirmManager [poll updates] Todo: * Respawning features not currently available running single-threaded. * When running single-site, configuration changes aren't picked up. * New sites or config changes affecting queue subscriptions are not yet handled without a daemon restart. * SNMP monitoring output to integrate with general tools (nagios, ganglia) * Convert XMPP confirmation message sends to use stomp queue instead of polling * Convert xmppdaemon.php to IoManager? * Convert Twitter status, friends import polling daemons to IoManager * Clean up some error reporting and failure modes * May need to adjust queue priorities for best perf in backlog/flood cases Detailed code history available in my daemon-work branch: http://www.gitorious.org/~brion/statusnet/brion-fixes/commits/daemon-work
2010-01-13 12:57:15 +09:00
# Low priority; we don't want to receive messages
common_log(LOG_INFO, "INITIALIZE");
$this->conn = jabber_connect($this->resource());
if (empty($this->conn)) {
common_log(LOG_ERR, "Couldn't connect to server.");
return false;
}
$this->conn->addEventHandler('message', 'forward_message', $this);
$this->conn->addEventHandler('reconnect', 'handle_reconnect', $this);
$this->conn->setReconnectTimeout(600);
jabber_send_presence("Send me a message to post a notice", 'available', null, 'available', -1);
return !is_null($this->conn);
}
/**
* Message pump is triggered on socket input, so we only need an idle()
* call often enough to trigger our outgoing pings.
*/
function timeout()
{
return self::PING_INTERVAL;
}
/**
* Lists the XMPP connection socket to allow i/o master to wake
* when input comes in here as well as from the queue source.
*
* @return array of resources
*/
public function getSockets()
{
if ($this->conn) {
return array($this->conn->getSocket());
} else {
return array();
}
Major refactoring of queue handlers to support running multiple sites in one daemon. Key changes: * Initialization code moved from common.php to StatusNet class; can now switch configurations during runtime. * As a consequence, configuration files must now be idempotent... Be careful with constant, function or class definitions. * Control structure for daemons/QueueManager/QueueHandler has been refactored; the run loop is now managed by IoMaster run via scripts/queuedaemon.php IoManager subclasses are woken to handle socket input or polling, and may cover multiple sites. * Plugins can implement notice queue handlers more easily by registering a QueueHandler class; no more need to add a daemon. The new QueueDaemon runs from scripts/queuedaemon.php: * This replaces most of the old *handler.php scripts; they've been refactored to the bare handler classes. * Spawns multiple child processes to spread load; defaults to CPU count on Linux and Mac OS X systems, or override with --threads=N * When multithreaded, child processes are automatically respawned on failure. * Threads gracefully shut down and restart when passing a soft memory limit (defaults to 90% of memory_limit), limiting damage from memory leaks. * Support for UDP-based monitoring: http://www.gitorious.org/snqmon Rough control flow diagram: QueueDaemon -> IoMaster -> IoManager QueueManager [listen or poll] -> QueueHandler XmppManager [ping & keepalive] XmppConfirmManager [poll updates] Todo: * Respawning features not currently available running single-threaded. * When running single-site, configuration changes aren't picked up. * New sites or config changes affecting queue subscriptions are not yet handled without a daemon restart. * SNMP monitoring output to integrate with general tools (nagios, ganglia) * Convert XMPP confirmation message sends to use stomp queue instead of polling * Convert xmppdaemon.php to IoManager? * Convert Twitter status, friends import polling daemons to IoManager * Clean up some error reporting and failure modes * May need to adjust queue priorities for best perf in backlog/flood cases Detailed code history available in my daemon-work branch: http://www.gitorious.org/~brion/statusnet/brion-fixes/commits/daemon-work
2010-01-13 12:57:15 +09:00
}
/**
* Process XMPP events that have come in over the wire.
* Side effects: may switch site configuration
* @fixme may kill process on XMPP error
* @param resource $socket
*/
public function handleInput($socket)
{
$this->switchSite();
# Process the queue for as long as needed
try {
if ($this->conn) {
assert($socket === $this->conn->getSocket());
common_log(LOG_DEBUG, "Servicing the XMPP queue.");
$this->stats('xmpp_process');
$this->conn->processTime(0);
}
} catch (XMPPHP_Exception $e) {
common_log(LOG_ERR, "Got an XMPPHP_Exception: " . $e->getMessage());
die($e->getMessage());
}
}
/**
* Idle processing for io manager's execution loop.
* Send keepalive pings to server.
*
* Side effect: kills process on exception from XMPP library.
*
* @fixme non-dying error handling
*/
public function idle($timeout=0)
{
if ($this->conn) {
$now = time();
if (empty($this->lastping) || $now - $this->lastping > self::PING_INTERVAL) {
$this->switchSite();
try {
$this->sendPing();
$this->lastping = $now;
} catch (XMPPHP_Exception $e) {
common_log(LOG_ERR, "Got an XMPPHP_Exception: " . $e->getMessage());
die($e->getMessage());
}
}
}
}
/**
* Send a keepalive ping to the XMPP server.
*/
protected function sendPing()
{
$jid = jabber_daemon_address().'/'.$this->resource();
$server = common_config('xmpp', 'server');
if (!isset($this->pingid)) {
$this->pingid = 0;
} else {
$this->pingid++;
}
common_log(LOG_DEBUG, "Sending ping #{$this->pingid}");
$this->conn->send("<iq from='{$jid}' to='{$server}' id='ping_{$this->pingid}' type='get'><ping xmlns='urn:xmpp:ping'/></iq>");
}
/**
* Callback for Jabber reconnect event
* @param $pl
*/
function handle_reconnect(&$pl)
{
common_log(LOG_NOTICE, 'XMPP reconnected');
$this->conn->processUntil('session_start');
$this->conn->presence(null, 'available', null, 'available', -1);
}
/**
* Callback for Jabber message event.
*
* This connection handles output; if we get a message straight to us,
* forward it on to our XmppDaemon listener for processing.
*
* @param $pl
*/
function forward_message(&$pl)
{
if ($pl['type'] != 'chat') {
common_log(LOG_DEBUG, 'Ignoring message of type ' . $pl['type'] . ' from ' . $pl['from']);
return;
}
$listener = $this->listener();
if (strtolower($listener) == strtolower($pl['from'])) {
common_log(LOG_WARNING, 'Ignoring loop message.');
return;
}
common_log(LOG_INFO, 'Forwarding message from ' . $pl['from'] . ' to ' . $listener);
$this->conn->message($this->listener(), $pl['body'], 'chat', null, $this->ofrom($pl['from']));
}
/**
* Build an <addresses> block with an ofrom entry for forwarded messages
*
* @param string $from Jabber ID of original sender
* @return string XML fragment
*/
protected function ofrom($from)
{
$address = "<addresses xmlns='http://jabber.org/protocol/address'>\n";
$address .= "<address type='ofrom' jid='$from' />\n";
$address .= "</addresses>\n";
return $address;
}
/**
* Build the complete JID of the XmppDaemon process which
* handles primary XMPP input for this site.
*
* @return string Jabber ID
*/
protected function listener()
{
if (common_config('xmpp', 'listener')) {
return common_config('xmpp', 'listener');
} else {
return jabber_daemon_address() . '/' . common_config('xmpp','resource') . 'daemon';
}
}
protected function resource()
{
return 'queue' . posix_getpid(); // @fixme PIDs won't be host-unique
}
/**
* Make sure we're on the right site configuration
*/
protected function switchSite()
{
if ($this->site != common_config('site', 'server')) {
common_log(LOG_DEBUG, __METHOD__ . ": switching to site $this->site");
$this->stats('switch');
StatusNet::init($this->site);
}
}
}