ec145b73fc
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
66 lines
1.9 KiB
PHP
66 lines
1.9 KiB
PHP
<?php
|
|
/**
|
|
* Table Definition for queue_item
|
|
*/
|
|
require_once INSTALLDIR.'/classes/Memcached_DataObject.php';
|
|
|
|
class Queue_item extends Memcached_DataObject
|
|
{
|
|
###START_AUTOCODE
|
|
/* the code below is auto generated do not remove the above tag */
|
|
|
|
public $__table = 'queue_item'; // table name
|
|
public $notice_id; // int(4) primary_key not_null
|
|
public $transport; // varchar(8) primary_key not_null
|
|
public $created; // datetime() not_null
|
|
public $claimed; // datetime()
|
|
|
|
/* Static get */
|
|
function staticGet($k,$v=null)
|
|
{ return Memcached_DataObject::staticGet('Queue_item',$k,$v); }
|
|
|
|
/* the code above is auto generated do not remove the tag below */
|
|
###END_AUTOCODE
|
|
|
|
function sequenceKey()
|
|
{ return array(false, false); }
|
|
|
|
static function top($transport=null) {
|
|
|
|
$qi = new Queue_item();
|
|
if ($transport) {
|
|
$qi->transport = $transport;
|
|
}
|
|
$qi->orderBy('created');
|
|
$qi->whereAdd('claimed is null');
|
|
|
|
$qi->limit(1);
|
|
|
|
$cnt = $qi->find(true);
|
|
|
|
if ($cnt) {
|
|
# XXX: potential race condition
|
|
# can we force it to only update if claimed is still null
|
|
# (or old)?
|
|
common_log(LOG_INFO, 'claiming queue item = ' . $qi->notice_id .
|
|
' for transport ' . $qi->transport);
|
|
$orig = clone($qi);
|
|
$qi->claimed = common_sql_now();
|
|
$result = $qi->update($orig);
|
|
if ($result) {
|
|
common_log(LOG_INFO, 'claim succeeded.');
|
|
return $qi;
|
|
} else {
|
|
common_log(LOG_INFO, 'claim failed.');
|
|
}
|
|
}
|
|
$qi = null;
|
|
return null;
|
|
}
|
|
|
|
function pkeyGet($kv)
|
|
{
|
|
return Memcached_DataObject::pkeyGet('Queue_item', $kv);
|
|
}
|
|
}
|