From ec145b73fc91dd54695dd374c8a71a11e233b8c0 Mon Sep 17 00:00:00 2001 From: Brion Vibber Date: Tue, 12 Jan 2010 19:57:15 -0800 Subject: 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 --- lib/xmppqueuehandler.php | 142 ----------------------------------------------- 1 file changed, 142 deletions(-) delete mode 100644 lib/xmppqueuehandler.php (limited to 'lib/xmppqueuehandler.php') diff --git a/lib/xmppqueuehandler.php b/lib/xmppqueuehandler.php deleted file mode 100644 index f28fc9088..000000000 --- a/lib/xmppqueuehandler.php +++ /dev/null @@ -1,142 +0,0 @@ -. - */ - -if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); } - -require_once(INSTALLDIR.'/lib/queuehandler.php'); - -define('PING_INTERVAL', 120); - -/** - * Common superclass for all XMPP-using queue handlers. They all need to - * service their message queues on idle, and forward any incoming messages - * to the XMPP listener connection. So, we abstract out common code to a - * superclass. - */ - -class XmppQueueHandler extends QueueHandler -{ - var $pingid = 0; - var $lastping = null; - - function start() - { - # Low priority; we don't want to receive messages - - $this->log(LOG_INFO, "INITIALIZE"); - $this->conn = jabber_connect($this->_id.$this->transport()); - - if (empty($this->conn)) { - $this->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); - } - - function timeout() - { - return 10; - } - - function handle_reconnect(&$pl) - { - $this->log(LOG_NOTICE, 'reconnected'); - - $this->conn->processUntil('session_start'); - $this->conn->presence(null, 'available', null, 'available', -1); - } - - function idle($timeout=0) - { - # Process the queue for as long as needed - try { - if ($this->conn) { - $this->log(LOG_DEBUG, "Servicing the XMPP queue."); - $this->conn->processTime($timeout); - $now = time(); - if (empty($this->lastping) || $now - $this->lastping > PING_INTERVAL) { - $this->sendPing(); - $this->lastping = $now; - } - } - } catch (XMPPHP_Exception $e) { - $this->log(LOG_ERR, "Got an XMPPHP_Exception: " . $e->getMessage()); - die($e->getMessage()); - } - } - - function sendPing() - { - $jid = jabber_daemon_address().'/'.$this->_id.$this->transport(); - $server = common_config('xmpp', 'server'); - - if (!isset($this->pingid)) { - $this->pingid = 0; - } else { - $this->pingid++; - } - - $this->log(LOG_DEBUG, "Sending ping #{$this->pingid}"); - - $this->conn->send(""); - } - - function forward_message(&$pl) - { - if ($pl['type'] != 'chat') { - $this->log(LOG_DEBUG, 'Ignoring message of type ' . $pl['type'] . ' from ' . $pl['from']); - return; - } - $listener = $this->listener(); - if (strtolower($listener) == strtolower($pl['from'])) { - $this->log(LOG_WARNING, 'Ignoring loop message.'); - return; - } - $this->log(LOG_INFO, 'Forwarding message from ' . $pl['from'] . ' to ' . $listener); - $this->conn->message($this->listener(), $pl['body'], 'chat', null, $this->ofrom($pl['from'])); - } - - function ofrom($from) - { - $address = "\n"; - $address .= "
\n"; - $address .= "\n"; - return $address; - } - - function listener() - { - if (common_config('xmpp', 'listener')) { - return common_config('xmpp', 'listener'); - } else { - return jabber_daemon_address() . '/' . common_config('xmpp','resource') . 'daemon'; - } - } - - function getSockets() - { - return array($this->conn->getSocket()); - } -} -- cgit v1.2.3-54-g00ecf