<?php
/*
* Laconica - a distributed open-source microblogging tool
- * Copyright (C) 2008, Controlez-Vous, Inc.
+ * Copyright (C) 2008, 2009, Control Yourself, Inc.
*
* 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
define('CLAIM_TIMEOUT', 1200);
-class QueueHandler {
-
- var $_id = 'generic';
-
- function QueueHandler($id=NULL) {
- if ($id) {
- $this->set_id($id);
- }
- }
-
- function class_name() {
- return ucfirst($this->transport()) . 'Handler';
- }
-
- function get_id() {
- return $this->_id;
- }
-
- function set_id($id) {
- $this->_id = $id;
- }
-
- function transport() {
- return NULL;
- }
-
- function start() {
- }
-
- function finish() {
- }
-
- function handle_notice($notice) {
- return true;
- }
-
- function handle_queue() {
- $this->log(LOG_INFO, 'checking for queued notices');
- $cnt = 0;
- $transport = $this->transport();
- do {
- $qi = Queue_item::top($transport);
- if ($qi) {
- $this->log(LOG_INFO, 'Got item enqueued '.common_exact_date($qi->created));
- $notice = Notice::staticGet($qi->notice_id);
- if ($notice) {
- $this->log(LOG_INFO, 'broadcasting notice ID = ' . $notice->id);
- # XXX: what to do if broadcast fails?
- $result = $this->handle_notice($notice);
- if (!$result) {
- $this->log(LOG_WARNING, 'Failed broadcast for notice ID = ' . $notice->id);
- $orig = $qi;
- $qi->claimed = NULL;
- $qi->update($orig);
- $this->log(LOG_WARNING, 'Abandoned claim for notice ID = ' . $notice->id);
- continue;
- }
- $this->log(LOG_INFO, 'finished broadcasting notice ID = ' . $notice->id);
- $notice = NULL;
- } else {
- $this->log(LOG_WARNING, 'queue item for notice that does not exist');
- }
- $qi->delete();
- $cnt++;
- } else {
- $this->clear_old_claims();
- sleep(10);
- }
- } while (true);
- }
-
- function clear_old_claims() {
- $qi = new Queue_item();
- $qi->transport = $this->transport();
- $qi->whereAdd('now() - claimed > '.CLAIM_TIMEOUT);
- $qi->update(DB_DATAOBJECT_WHEREADD_ONLY);
- }
-
- function log($level, $msg) {
- common_log($level, $this->class_name() . ' ('. $this->get_id() .'): '.$msg);
- }
+if (!defined('LACONICA')) { exit(1); }
+
+require_once(INSTALLDIR.'/lib/daemon.php');
+require_once(INSTALLDIR.'/classes/Queue_item.php');
+require_once(INSTALLDIR.'/classes/Notice.php');
+
+class QueueHandler extends Daemon
+{
+
+ var $_id = 'generic';
+
+ function QueueHandler($id=null)
+ {
+ if ($id) {
+ $this->set_id($id);
+ }
+ }
+
+ function class_name()
+ {
+ return ucfirst($this->transport()) . 'Handler';
+ }
+
+ function name()
+ {
+ return strtolower($this->class_name().'.'.$this->get_id());
+ }
+
+ function get_id()
+ {
+ return $this->_id;
+ }
+
+ function set_id($id)
+ {
+ $this->_id = $id;
+ }
+
+ function transport()
+ {
+ return null;
+ }
+
+ function start()
+ {
+ }
+
+ function finish()
+ {
+ }
+
+ function handle_notice($notice)
+ {
+ return true;
+ }
+
+ function db_dispatch() {
+ do {
+ $qi = Queue_item::top($this->transport());
+ if ($qi) {
+ $this->log(LOG_INFO, 'Got item enqueued '.common_exact_date($qi->created));
+ $notice = Notice::staticGet($qi->notice_id);
+ if ($notice) {
+ $this->log(LOG_INFO, 'broadcasting notice ID = ' . $notice->id);
+ # XXX: what to do if broadcast fails?
+ $result = $this->handle_notice($notice);
+ if (!$result) {
+ $this->log(LOG_WARNING, 'Failed broadcast for notice ID = ' . $notice->id);
+ $orig = $qi;
+ $qi->claimed = null;
+ $qi->update($orig);
+ $this->log(LOG_WARNING, 'Abandoned claim for notice ID = ' . $notice->id);
+ continue;
+ }
+ $this->log(LOG_INFO, 'finished broadcasting notice ID = ' . $notice->id);
+ $notice->free();
+ unset($notice);
+ $notice = null;
+ } else {
+ $this->log(LOG_WARNING, 'queue item for notice that does not exist');
+ }
+ $qi->delete();
+ $qi->free();
+ unset($qi);
+ $this->idle(0);
+ } else {
+ $this->clear_old_claims();
+ $this->idle(5);
+ }
+ } while (true);
+ }
+
+ function stomp_dispatch() {
+ require("Stomp.php");
+ $con = new Stomp(common_config('queue','stomp_server'));
+ if (!$con->connect()) {
+ $this->log(LOG_ERR, 'Failed to connect to queue server');
+ return false;
+ }
+ $queue_basename = common_config('queue','queue_basename');
+ // subscribe to the relevant queue (format: basename-transport)
+ $con->subscribe('/queue/'.$queue_basename.'-'.$this->transport());
+
+ do {
+ $frame = $con->readFrame();
+ if ($frame) {
+ $this->log(LOG_INFO, 'Got item enqueued '.common_exact_date($frame->headers['created']));
+
+ // XXX: Now the queue handler receives only the ID of the
+ // notice, and it has to get it from the DB
+ // A massive improvement would be avoid DB query by transmitting
+ // all the notice details via queue server...
+ $notice = Notice::staticGet($frame->body);
+
+ if ($notice) {
+ $this->log(LOG_INFO, 'broadcasting notice ID = ' . $notice->id);
+ $result = $this->handle_notice($notice);
+ if ($result) {
+ // if the msg has been handled positively, ack it
+ // and the queue server will remove it from the queue
+ $con->ack($frame);
+ $this->log(LOG_INFO, 'finished broadcasting notice ID = ' . $notice->id);
+ }
+ else {
+ // no ack
+ $this->log(LOG_WARNING, 'Failed broadcast for notice ID = ' . $notice->id);
+ }
+ $notice->free();
+ unset($notice);
+ $notice = null;
+ } else {
+ $this->log(LOG_WARNING, 'queue item for notice that does not exist');
+ }
+ }
+ } while (true);
+
+ $con->disconnect();
+ }
+
+ function run()
+ {
+ if (!$this->start()) {
+ return false;
+ }
+ $this->log(LOG_INFO, 'checking for queued notices');
+ if (common_config('queue','subsystem') == 'stomp') {
+ $this->stomp_dispatch();
+ }
+ else {
+ $this->db_dispatch();
+ }
+ if (!$this->finish()) {
+ return false;
+ }
+ return true;
+ }
+
+ function idle($timeout=0)
+ {
+ if ($timeout>0) {
+ sleep($timeout);
+ }
+ }
+
+ function clear_old_claims()
+ {
+ $qi = new Queue_item();
+ $qi->transport = $this->transport();
+ $qi->whereAdd('now() - claimed > '.CLAIM_TIMEOUT);
+ $qi->update(DB_DATAOBJECT_WHEREADD_ONLY);
+ $qi->free();
+ unset($qi);
+ }
+
+ function log($level, $msg)
+ {
+ common_log($level, $this->class_name() . ' ('. $this->get_id() .'): '.$msg);
+ }
}
-
\ No newline at end of file
+
projects / quix0rs-gnu-social.git / blobdiff