#!/usr/bin/env php

<?php

/*

 * StatusNet - the distributed open-source microblogging tool

 * Copyright (C) 2008, 2009, StatusNet, 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

 * 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/>.

 */

define('INSTALLDIR', realpath(dirname(__FILE__) . '/..'));

$shortoptions = 'fi:at:';

$longoptions = array('id=', 'foreground', 'all', 'threads=');

/**

 * Attempts to get a count of the processors available on the current system

 * to fan out multiple threads.

 *

 * Recognizes Linux and Mac OS X; others will return default of 1.

 *

 * @fixme move this to SpawningDaemon, but to get the default val for help

 *        text we seem to need it before loading infrastructure

 * @return intval

 */

function getProcessorCount()

{

    $cpus = 0;

    switch (PHP_OS) {

    case 'Linux':

        $cpuinfo = file('/proc/cpuinfo');

        foreach (file('/proc/cpuinfo') as $line) {

            if (preg_match('/^processor\s+:\s+(\d+)\s?$/', $line)) {

                $cpus++;

            }

        }

        break;

    case 'Darwin':

        $cpus = intval(shell_exec("/usr/sbin/sysctl -n hw.ncpu 2>/dev/null"));

        break;

    }

    if ($cpus) {

        return $cpus;

    }

    return 1;

}

$threads = getProcessorCount();

$helptext = <<<END_OF_QUEUE_HELP

Daemon script for running queued items.

    -i --id           Identity (default none)

    -f --foreground   Stay in the foreground (default background)

    -a --all          Handle queues for all local sites

                      (requires Stomp queue handler, status_network setup)

    -t --threads=<n>  Spawn <n> processing threads (default $threads)

END_OF_QUEUE_HELP;

require_once INSTALLDIR.'/scripts/commandline.inc';

require_once(INSTALLDIR.'/lib/daemon.php');

require_once(INSTALLDIR.'/classes/Queue_item.php');

require_once(INSTALLDIR.'/classes/Notice.php');

/**

 * Queue handling daemon...

 *

 * The queue daemon by default launches in the background, at which point

 * it'll pass control to the configured QueueManager class to poll for updates.

 *

 * We can then pass individual items through the QueueHandler subclasses

 * they belong to.

 */

class QueueDaemon extends SpawningDaemon

{

    protected $allsites = false;

    function __construct($id=null, $daemonize=true, $threads=1, $allsites=false)

    {

        parent::__construct($id, $daemonize, $threads);

        $this->allsites = $allsites;

    }

    /**

     * Setup and start of run loop for this queue handler as a daemon.

     * Most of the heavy lifting is passed on to the QueueManager's service()

     * method, which passes control on to the QueueHandler's handle()

     * method for each item that comes in on the queue.

     *

     * @return boolean true on success, false on failure

     */

    function runThread()

    {

        $this->log(LOG_INFO, 'checking for queued notices');

        $master = new QueueMaster($this->get_id(), $this->processManager());

        $master->init($this->allsites);

        try {

            $master->service();

        } catch (Exception $e) {

            common_log(LOG_ERR, "Unhandled exception: " . $e->getMessage() . ' ' .

                str_replace("\n", " ", $e->getTraceAsString()));

            return self::EXIT_ERR;

        }

        $this->log(LOG_INFO, 'finished servicing the queue');

        $this->log(LOG_INFO, 'terminating normally');

        return $master->respawn ? self::EXIT_RESTART : self::EXIT_SHUTDOWN;

    }

}

class QueueMaster extends IoMaster

{

    protected $processManager;

    function __construct($id, $processManager)

    {

        parent::__construct($id);

        $this->processManager = $processManager;

    }

    /**

     * Initialize IoManagers which are appropriate to this instance.

     */

    function initManagers()

    {

        $managers = array();

        if (Event::handle('StartQueueDaemonIoManagers', array(&$managers))) {

            $qm = QueueManager::get();

            $qm->setActiveGroup('main');

            $managers[] = $qm;

            $managers[] = $this->processManager;

        }

        Event::handle('EndQueueDaemonIoManagers', array(&$managers));

        foreach ($managers as $manager) {

            $this->instantiate($manager);

        }

    }

}

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;

}

if (have_option('t')) {

    $threads = intval(get_option_value('t'));

} else if (have_option('--threads')) {

    $threads = intval(get_option_value('--threads'));

} else {

    $threads = 0;

}

if (!$threads) {

    $threads = getProcessorCount();

}

$daemonize = !(have_option('f') || have_option('--foreground'));

$all = have_option('a') || have_option('--all');

$daemon = new QueueDaemon($id, $daemonize, $threads, $all);

$daemon->runOnce();