forked from GNUsocial/gnu-social
380 lines
12 KiB
PHP
380 lines
12 KiB
PHP
<?php
|
|
/**
|
|
* StatusNet, the distributed open-source microblogging tool
|
|
*
|
|
* Abstract class for i/o managers
|
|
*
|
|
* PHP version 5
|
|
*
|
|
* LICENCE: 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/>.
|
|
*
|
|
* @category QueueManager
|
|
* @package StatusNet
|
|
* @author Evan Prodromou <evan@status.net>
|
|
* @author Sarven Capadisli <csarven@status.net>
|
|
* @author Brion Vibber <brion@status.net>
|
|
* @copyright 2009-2010 StatusNet, Inc.
|
|
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
|
|
* @link http://status.net/
|
|
*/
|
|
|
|
/**
|
|
* Completed child classes must implement the enqueue() method.
|
|
*
|
|
* For background processing, classes should implement either socket-based
|
|
* input (handleInput(), getSockets()) or idle-loop polling (idle()).
|
|
*/
|
|
abstract class QueueManager extends IoManager
|
|
{
|
|
static $qm = null;
|
|
|
|
protected $master = null;
|
|
protected $handlers = array();
|
|
protected $groups = array();
|
|
protected $activeGroups = array();
|
|
protected $ignoredTransports = array();
|
|
|
|
/**
|
|
* Factory function to pull the appropriate QueueManager object
|
|
* for this site's configuration. It can then be used to queue
|
|
* events for later processing or to spawn a processing loop.
|
|
*
|
|
* Plugins can add to the built-in types by hooking StartNewQueueManager.
|
|
*
|
|
* @return QueueManager
|
|
*/
|
|
public static function get()
|
|
{
|
|
if (empty(self::$qm)) {
|
|
|
|
if (Event::handle('StartNewQueueManager', array(&self::$qm))) {
|
|
|
|
$enabled = common_config('queue', 'enabled');
|
|
$type = common_config('queue', 'subsystem');
|
|
|
|
if (!$enabled) {
|
|
// does everything immediately
|
|
self::$qm = new UnQueueManager();
|
|
} else {
|
|
switch ($type) {
|
|
case 'db':
|
|
self::$qm = new DBQueueManager();
|
|
break;
|
|
case 'stomp':
|
|
self::$qm = new StompQueueManager();
|
|
break;
|
|
default:
|
|
throw new ServerException("No queue manager class for type '$type'");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return self::$qm;
|
|
}
|
|
|
|
/**
|
|
* @fixme wouldn't necessarily work with other class types.
|
|
* Better to change the interface...?
|
|
*/
|
|
public static function multiSite()
|
|
{
|
|
if (common_config('queue', 'subsystem') == 'stomp') {
|
|
return IoManager::INSTANCE_PER_PROCESS;
|
|
} else {
|
|
return IoManager::SINGLE_ONLY;
|
|
}
|
|
}
|
|
|
|
function __construct()
|
|
{
|
|
$this->initialize();
|
|
}
|
|
|
|
/**
|
|
* Optional; ping any running queue handler daemons with a notification
|
|
* such as announcing a new site to handle or requesting clean shutdown.
|
|
* This avoids having to restart all the daemons manually to update configs
|
|
* and such.
|
|
*
|
|
* Called from scripts/queuectl.php controller utility.
|
|
*
|
|
* @param string $event event key
|
|
* @param string $param optional parameter to append to key
|
|
* @return boolean success
|
|
*/
|
|
public function sendControlSignal($event, $param='')
|
|
{
|
|
throw new Exception(get_class($this) . " does not support control signals.");
|
|
}
|
|
|
|
/**
|
|
* Store an object (usually/always a Notice) into the given queue
|
|
* for later processing. No guarantee is made on when it will be
|
|
* processed; it could be immediately or at some unspecified point
|
|
* in the future.
|
|
*
|
|
* Must be implemented by any queue manager.
|
|
*
|
|
* @param Notice $object
|
|
* @param string $queue
|
|
*/
|
|
abstract function enqueue($object, $queue);
|
|
|
|
/**
|
|
* Build a representation for an object for logging
|
|
* @param mixed
|
|
* @return string
|
|
*/
|
|
function logrep($object) {
|
|
if (is_object($object)) {
|
|
$class = get_class($object);
|
|
if (isset($object->id)) {
|
|
return "$class $object->id";
|
|
}
|
|
return $class;
|
|
} elseif (is_string($object)) {
|
|
$len = strlen($object);
|
|
$fragment = mb_substr($object, 0, 32);
|
|
if (mb_strlen($object) > 32) {
|
|
$fragment .= '...';
|
|
}
|
|
return "string '$fragment' ($len bytes)";
|
|
} elseif (is_array($object)) {
|
|
return 'array with ' . count($object) .
|
|
' elements (keys:[' . implode(',', array_keys($object)) . '])';
|
|
}
|
|
return strval($object);
|
|
}
|
|
|
|
/**
|
|
* Encode an object for queued storage.
|
|
*
|
|
* @param mixed $item
|
|
* @return string
|
|
*/
|
|
protected function encode($item)
|
|
{
|
|
return serialize($item);
|
|
}
|
|
|
|
/**
|
|
* Decode an object from queued storage.
|
|
* Accepts notice reference entries and serialized items.
|
|
*
|
|
* @param string
|
|
* @return mixed
|
|
*/
|
|
protected function decode($frame)
|
|
{
|
|
$object = unserialize($frame);
|
|
|
|
// If it is a string, we really store a JSON object in there
|
|
// except if it begins with '<', because then it is XML.
|
|
if (is_string($object) &&
|
|
substr($object, 0, 1) != '<' &&
|
|
!is_numeric($object))
|
|
{
|
|
$json = json_decode($object);
|
|
if ($json === null) {
|
|
throw new Exception('Bad frame in queue item');
|
|
}
|
|
|
|
// The JSON object has a type parameter which contains the class
|
|
if (empty($json->type)) {
|
|
throw new Exception('Type not specified for queue item');
|
|
}
|
|
if (!is_a($json->type, 'Managed_DataObject', true)) {
|
|
throw new Exception('Managed_DataObject class does not exist for queue item');
|
|
}
|
|
|
|
// And each of these types should have a unique id (or uri)
|
|
if (isset($json->id) && !empty($json->id)) {
|
|
$object = call_user_func(array($json->type, 'getKV'), 'id', $json->id);
|
|
} elseif (isset($json->uri) && !empty($json->uri)) {
|
|
$object = call_user_func(array($json->type, 'getKV'), 'uri', $json->uri);
|
|
}
|
|
|
|
// But if no object was found, there's nothing we can handle
|
|
if (!$object instanceof Managed_DataObject) {
|
|
throw new Exception('Queue item frame referenced a non-existant object');
|
|
}
|
|
}
|
|
|
|
// If the frame was not a string, it's either an array or an object.
|
|
|
|
return $object;
|
|
}
|
|
|
|
/**
|
|
* Instantiate the appropriate QueueHandler class for the given queue.
|
|
*
|
|
* @param string $queue
|
|
* @return mixed QueueHandler or null
|
|
*/
|
|
function getHandler($queue)
|
|
{
|
|
if (isset($this->handlers[$queue])) {
|
|
$class = $this->handlers[$queue];
|
|
if(is_object($class)) {
|
|
return $class;
|
|
} else if (class_exists($class)) {
|
|
return new $class();
|
|
} else {
|
|
$this->_log(LOG_ERR, "Nonexistent handler class '$class' for queue '$queue'");
|
|
}
|
|
}
|
|
throw new NoQueueHandlerException($queue);
|
|
}
|
|
|
|
/**
|
|
* Get a list of registered queue transport names to be used
|
|
* for listening in this daemon.
|
|
*
|
|
* @return array of strings
|
|
*/
|
|
function activeQueues()
|
|
{
|
|
$queues = array();
|
|
foreach ($this->activeGroups as $group) {
|
|
if (isset($this->groups[$group])) {
|
|
$queues = array_merge($queues, $this->groups[$group]);
|
|
}
|
|
}
|
|
|
|
return array_keys($queues);
|
|
}
|
|
|
|
function getIgnoredTransports()
|
|
{
|
|
return array_keys($this->ignoredTransports);
|
|
}
|
|
|
|
function ignoreTransport($transport)
|
|
{
|
|
// key is used for uniqueness, value doesn't mean anything
|
|
$this->ignoredTransports[$transport] = true;
|
|
}
|
|
|
|
/**
|
|
* Initialize the list of queue handlers for the current site.
|
|
*
|
|
* @event StartInitializeQueueManager
|
|
* @event EndInitializeQueueManager
|
|
*/
|
|
function initialize()
|
|
{
|
|
$this->handlers = array();
|
|
$this->groups = array();
|
|
$this->groupsByTransport = array();
|
|
|
|
if (Event::handle('StartInitializeQueueManager', array($this))) {
|
|
$this->connect('distrib', 'DistribQueueHandler');
|
|
$this->connect('ping', 'PingQueueHandler');
|
|
if (common_config('sms', 'enabled')) {
|
|
$this->connect('sms', 'SmsQueueHandler');
|
|
}
|
|
|
|
// Background user management tasks...
|
|
$this->connect('deluser', 'DelUserQueueHandler');
|
|
$this->connect('feedimp', 'FeedImporter');
|
|
$this->connect('actimp', 'ActivityImporter');
|
|
$this->connect('acctmove', 'AccountMover');
|
|
$this->connect('actmove', 'ActivityMover');
|
|
|
|
// For compat with old plugins not registering their own handlers.
|
|
$this->connect('Module', 'ModuleQueueHandler');
|
|
}
|
|
Event::handle('EndInitializeQueueManager', array($this));
|
|
}
|
|
|
|
/**
|
|
* Register a queue transport name and handler class for your plugin.
|
|
* Only registered transports will be reliably picked up!
|
|
*
|
|
* @param string $transport
|
|
* @param string $class class name or object instance
|
|
* @param string $group
|
|
*/
|
|
public function connect($transport, $class, $group='main')
|
|
{
|
|
$this->handlers[$transport] = $class;
|
|
$this->groups[$group][$transport] = $class;
|
|
$this->groupsByTransport[$transport] = $group;
|
|
}
|
|
|
|
/**
|
|
* Set the active group which will be used for listening.
|
|
* @param string $group
|
|
*/
|
|
function setActiveGroup($group)
|
|
{
|
|
$this->activeGroups = array($group);
|
|
}
|
|
|
|
/**
|
|
* Set the active group(s) which will be used for listening.
|
|
* @param array $groups
|
|
*/
|
|
function setActiveGroups($groups)
|
|
{
|
|
$this->activeGroups = $groups;
|
|
}
|
|
|
|
/**
|
|
* @return string queue group for this queue
|
|
*/
|
|
function queueGroup($queue)
|
|
{
|
|
if (isset($this->groupsByTransport[$queue])) {
|
|
return $this->groupsByTransport[$queue];
|
|
} else {
|
|
throw new Exception("Requested group for unregistered transport $queue");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Send a statistic ping to the queue monitoring system,
|
|
* optionally with a per-queue id.
|
|
*
|
|
* @param string $key
|
|
* @param string $queue
|
|
*/
|
|
function stats($key, $queue=false)
|
|
{
|
|
$owners = array();
|
|
if ($queue) {
|
|
$owners[] = "queue:$queue";
|
|
$owners[] = "site:" . common_config('site', 'server');
|
|
}
|
|
if (isset($this->master)) {
|
|
$this->master->stats($key, $owners);
|
|
} else {
|
|
$monitor = new QueueMonitor();
|
|
$monitor->stats($key, $owners);
|
|
}
|
|
}
|
|
|
|
protected function _log($level, $msg)
|
|
{
|
|
$class = get_class($this);
|
|
if ($this->activeGroups) {
|
|
$groups = ' (' . implode(',', $this->activeGroups) . ')';
|
|
} else {
|
|
$groups = '';
|
|
}
|
|
common_log($level, "$class$groups: $msg");
|
|
}
|
|
}
|