Commit Graph

20 Commits

Author SHA1 Message Date
Brion Vibber
26fdf0c9d2 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.
2010-01-21 16:42:50 -08:00
Brion Vibber
ec145b73fc 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
2010-01-12 20:45:09 -08:00
Brion Vibber
4e2acd153b ...and drop the unnecessary &reference from child class pkeyGet() overrides. 2010-01-06 14:28:40 -08:00
Evan Prodromou
854c82cfd5 start of queuemanager code 2009-06-28 14:38:34 -04:00
Evan Prodromou
7ad2f2a371 TRUE
More PEAR coding standards global changes. Here, I've changed all
instances of TRUE to true and FALSE to false.

darcs-hash:20081223194428-84dde-cb1a1e6f679acd68e864545c4d4dd8752d6a6257.gz
2008-12-23 14:44:28 -05:00
Evan Prodromou
04ef1ba8ee change function headers to K&R style
Another huge change, for PEAR code standards compliance. Function
headers have to be in K&R style (opening brace on its own line),
instead of having the opening brace on the same line as the function
and parameters. So, a little perl magic found all the function
definitions and move the opening brace to the next line (properly
indented... usually).

darcs-hash:20081223193323-84dde-a28e36ecc66672c783c2842d12fc11043c13ab28.gz
2008-12-23 14:33:23 -05:00
Evan Prodromou
eb2f9c98ac replace NULL with null
Another global search-and-replace update. Here, I've replaced the PHP
keyword 'NULL' with its lowercase version. This is another PEAR code
standards change.

darcs-hash:20081223192129-84dde-4a0182e0ec16a01ad88745ad3e08f7cb501aee0b.gz
2008-12-23 14:21:29 -05:00
Evan Prodromou
edbc0c665c replace all tabs with four spaces
The PEAR coding standards decree: no tabs, but indent by four spaces.
I've done a global search-and-replace on all tabs, replacing them by
four spaces. This is a huge change, but it will go a long way to
getting us towards phpcs-compliance. And that means better code
readability, and that means more participation.

darcs-hash:20081223191907-84dde-21e8efe210e6d5d54e935a22d0cee5c7bbfc007d.gz
2008-12-23 14:19:07 -05:00
Evan Prodromou
8da61dc1d3 path correct in require_once for memcached
darcs-hash:20080926161824-5ed1f-b4fb53e5ca65bb099aabbba6ea60a13496f669a2.gz
2008-09-26 12:18:24 -04:00
Evan Prodromou
f6615f70e5 prepend Memcached_DataObject require with INSTALLDIR
darcs-hash:20080926161540-5ed1f-2e9dc6f2297c612208214a6d52f36ce0dd7aa4de.gz
2008-09-26 12:15:40 -04:00
Evan Prodromou
e2e6bbb298 caching layer for DB/DataObject
I added a new class, Memcached_DataObject, that will (optionally)
fetch data out of a memcached server if it's available. This only
works on 'staticGet'.

Methods that write to the database (insert, update, delete) will clear
and set the cache correctly, too.

darcs-hash:20080926160941-5ed1f-922de078b4c1941853ad014edf9a17fae486f8cf.gz
2008-09-26 12:09:41 -04:00
Evan Prodromou
ca1f639fd6 log transport when claiming a notice
darcs-hash:20080830054933-84dde-58cc7aa6947612cda9987d532d85d9dd81e32410.gz
2008-08-30 01:49:33 -04:00
Evan Prodromou
6b1f391306 $this->log to common_log in Queue_item
darcs-hash:20080828004503-84dde-c406172d750d0a5452d5cc62ecd7b27db381c575.gz
2008-08-27 20:45:03 -04:00
Evan Prodromou
35ed6f473c change queue_item to use a compound primary key
Breaking up to use multiple queue handlers means we need multiple
queue items for the same notice. So, change the queue_item table to
have a compound pkey, (notice_id,transport).

darcs-hash:20080827211239-84dde-db118799bfd43be62fb02380829c64813c9334f8.gz
2008-08-27 17:12:39 -04:00
Evan Prodromou
b9f0ea6f0e break up monolithic xmppdaemon into multiple queue handlers
Eventually, the poor xmppdaemon has become overloaded with extra
tasks. So, I've broken it up. Now, we have 5 background scripts, and
more coming:

* xmppdaemon.php - handles incoming XMPP messages only.
* xmppqueuehandler.php - sends notices from the queue out through XMPP.
* smsqueuehandler.php - sends notices from the queue out over SMS
* ombqueuehandler.php - sends notices from the queue out over OMB
* xmppconfirmhandler.php - sends confirmation requests out over XMPP.

This is in addition to maildaemon.php, which takes incoming messages.

None of these are "true" daemons -- they don't daemonize themselves
automatically. Use nohup or another tool to background them. monit can
also be useful to keep them running.

At some point, these might become fork()'ing daemons, able to handle
more than one notice at a time. For now, I'm just running multiple
instances, hoping they don't interfere.

darcs-hash:20080827205407-84dde-97884a12f5f4e54c93bc785bd280683d1ee7e749.gz
2008-08-27 16:54:07 -04:00
Evan Prodromou
53f59ca9d2 add a transport flag to queue items
darcs-hash:20080719140906-84dde-9fcac26ee544ad53091808256f70b1745ac27a70.gz
2008-07-19 10:09:06 -04:00
Evan Prodromou
499afd8c22 replies from people you're not subscribed to over Jabber
darcs-hash:20080715195513-84dde-454419c971015be385d9c4c35f7acbee419031f9.gz
2008-07-15 15:55:13 -04:00
Mike Cochrane
4b656f47df Merge conflicts and kill a whole lot of trailing whitespace on lines.
darcs-hash:20080709224630-533db-b5399baef280133858dac9b89c2cd6a2aba9f861.gz
2008-07-09 18:46:30 -04:00
Evan Prodromou
e45a97a20f don't treat notice_id like a sequence
darcs-hash:20080704082418-84dde-5f314d3f0c72756f480599913a4aab6c0404dcc6.gz
2008-07-04 04:24:18 -04:00
Evan Prodromou
784299c257 add a queued notice item
darcs-hash:20080704040746-84dde-36803f820ea7c238613cf5728c59a18ff1eb442d.gz
2008-07-04 00:07:46 -04:00