XMPP queued output & initial retooling of DB queue manager to support non-Notice objects.

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.

2 files changed, 11 insertions, 80 deletions

diff --git a/plugins/RSSCloud/RSSCloudPlugin.php b/plugins/RSSCloud/RSSCloudPlugin.php
index 2de162628..9f444c8bb 100644
--- a/plugins/RSSCloud/RSSCloudPlugin.php
+++ b/plugins/RSSCloud/RSSCloudPlugin.php
@@ -138,6 +138,9 @@ class RSSCloudPlugin extends Plugin
         case 'RSSCloudNotifier':
             include_once INSTALLDIR . '/plugins/RSSCloud/RSSCloudNotifier.php';
             return false;
+        case 'RSSCloudQueueHandler':
+            include_once INSTALLDIR . '/plugins/RSSCloud/RSSCloudQueueHandler.php';
+            return false;
         case 'RSSCloudRequestNotifyAction':
         case 'LoggingAggregatorAction':
             include_once INSTALLDIR . '/plugins/RSSCloud/' .
@@ -194,32 +197,6 @@ class RSSCloudPlugin extends Plugin
     }
 
     /**
-     * broadcast the message when not using queuehandler
-     *
-     * @param Notice &$notice the notice
-     * @param array  $queue   destination queue
-     *
-     * @return boolean hook return
-     */
-
-    function onUnqueueHandleNotice(&$notice, $queue)
-    {
-        if (($queue == 'rsscloud') && ($this->_isLocal($notice))) {
-
-            common_debug('broadcasting rssCloud bound notice ' . $notice->id);
-
-            $profile = $notice->getProfile();
-
-            $notifier = new RSSCloudNotifier();
-            $notifier->notify($profile);
-
-            return false;
-        }
-
-        return true;
-    }
-
-    /**
      * Determine whether the notice was locally created
      *
      * @param Notice $notice the notice in question
@@ -261,19 +238,15 @@ class RSSCloudPlugin extends Plugin
     }
 
     /**
-     * Add RSSCloudQueueHandler to the list of valid daemons to
-     * start
+     * Register RSSCloud notice queue handler
      *
-     * @param array $daemons the list of daemons to run
+     * @param QueueManager $manager
      *
      * @return boolean hook return
-     *
      */
-
-    function onGetValidDaemons($daemons)
+    function onEndInitializeQueueManager($manager)
     {
-        array_push($daemons, INSTALLDIR .
-                   '/plugins/RSSCloud/RSSCloudQueueHandler.php');
+        $manager->connect('rsscloud', 'RSSCloudQueueHandler');
         return true;
     }
 
diff --git a/plugins/RSSCloud/RSSCloudQueueHandler.php b/plugins/RSSCloud/RSSCloudQueueHandler.php
index 693dd27c1..295c26189 100755..100644
--- a/plugins/RSSCloud/RSSCloudQueueHandler.php
+++ b/plugins/RSSCloud/RSSCloudQueueHandler.php
@@ -1,4 +1,3 @@
-#!/usr/bin/env php
 <?php
 /*
  * StatusNet - the distributed open-source microblogging tool
@@ -18,61 +17,20 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-define('INSTALLDIR', realpath(dirname(__FILE__) . '/../..'));
-
-$shortoptions = 'i::';
-$longoptions = array('id::');
-
-$helptext = <<<END_OF_ENJIT_HELP
-Daemon script for pushing new notices to RSSCloud subscribers.
-
-    -i --id           Identity (default none)
-
-END_OF_ENJIT_HELP;
-
-require_once INSTALLDIR . '/scripts/commandline.inc';
-require_once INSTALLDIR . '/lib/queuehandler.php';
-require_once INSTALLDIR . '/plugins/RSSCloud/RSSCloudNotifier.php';
-require_once INSTALLDIR . '/plugins/RSSCloud/RSSCloudSubscription.php';
+if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }
 
 class RSSCloudQueueHandler extends QueueHandler
 {
-    var $notifier = null;
-
     function transport()
     {
         return 'rsscloud';
     }
 
-    function start()
-    {
-        $this->log(LOG_INFO, "INITIALIZE");
-        $this->notifier = new RSSCloudNotifier();
-        return true;
-    }
-
-    function handle_notice($notice)
+    function handle($notice)
     {
         $profile = $notice->getProfile();
-        return $this->notifier->notify($profile);
-    }
-
-    function finish()
-    {
+        $notifier = new RSSCloudNotifier();
+        return $notifier->notify($profile);
     }
-
-}
-
-if (have_option('i')) {
-    $id = get_option_value('i');
-} else if (have_option('--id')) {
-    $id = get_option_value('--id');
-} else if (count($args) > 0) {
-    $id = $args[0];
-} else {
-    $id = null;
 }
 
-$handler = new RSSCloudQueueHandler($id);
-
-$handler->runOnce();