109 lines
2.7 KiB
PHP
109 lines
2.7 KiB
PHP
<?php
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/*
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* Laconica - a distributed open-source microblogging tool
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* Copyright (C) 2008, Controlez-Vous, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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define('CLAIM_TIMEOUT', 1200);
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class QueueHandler {
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var $_id = 'generic';
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function QueueHandler($id=NULL) {
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if ($id) {
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$this->set_id($id);
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}
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}
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function class_name() {
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return ucfirst($this->transport()) . 'Handler';
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}
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function get_id() {
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return $this->_id;
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}
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function set_id($id) {
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$this->_id = $id;
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}
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function transport() {
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return NULL;
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}
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function start() {
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}
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function finish() {
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}
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function handle_notice($notice) {
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return true;
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}
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function handle_queue() {
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$this->log(LOG_INFO, 'checking for queued notices');
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$transport = $this->transport();
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do {
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$qi = Queue_item::top($transport);
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if ($qi) {
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$this->log(LOG_INFO, 'Got item enqueued '.common_exact_date($qi->created));
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$notice = Notice::staticGet($qi->notice_id);
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if ($notice) {
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$this->log(LOG_INFO, 'broadcasting notice ID = ' . $notice->id);
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# XXX: what to do if broadcast fails?
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$result = $this->handle_notice($notice);
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if (!$result) {
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$this->log(LOG_WARNING, 'Failed broadcast for notice ID = ' . $notice->id);
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$orig = $qi;
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$qi->claimed = NULL;
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$qi->update($orig);
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$this->log(LOG_WARNING, 'Abandoned claim for notice ID = ' . $notice->id);
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continue;
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}
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$this->log(LOG_INFO, 'finished broadcasting notice ID = ' . $notice->id);
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$notice = NULL;
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} else {
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$this->log(LOG_WARNING, 'queue item for notice that does not exist');
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}
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$qi->delete();
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$this->idle(0);
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} else {
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$this->clear_old_claims();
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$this->idle(5);
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}
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} while (true);
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}
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function idle($timeout=0) {
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if ($timeout>0) {
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sleep($timeout);
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}
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}
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function clear_old_claims() {
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$qi = new Queue_item();
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$qi->transport = $this->transport();
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$qi->whereAdd('now() - claimed > '.CLAIM_TIMEOUT);
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$qi->update(DB_DATAOBJECT_WHEREADD_ONLY);
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}
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function log($level, $msg) {
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common_log($level, $this->class_name() . ' ('. $this->get_id() .'): '.$msg);
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}
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}
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