scheduler.php
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<?php
/**
* $Id:$
*
* KnowledgeTree Open Source Edition
* Document Management Made Simple
* Copyright (C) 2004 - 2007 The Jam Warehouse Software (Pty) Limited
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License version 3 as published by the
* Free Software Foundation.
*
* 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 General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* You can contact The Jam Warehouse Software (Pty) Limited, Unit 1, Tramber Place,
* Blake Street, Observatory, 7925 South Africa. or email info@knowledgetree.com.
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU General Public License version 3.
*
* In accordance with Section 7(b) of the GNU General Public License version 3,
* these Appropriate Legal Notices must retain the display of the "Powered by
* KnowledgeTree" logo and retain the original copyright notice. If the display of the
* logo is not reasonably feasible for technical reasons, the Appropriate Legal Notices
* must display the words "Powered by KnowledgeTree" and retain the original
* copyright notice.
* Contributor( s): ______________________________________
*
*/
require_once('../config/dmsDefaults.php');
require_once(KT_LIB_DIR . '/database/dbutil.inc');
// Set the time limit to 0 to prevent the script timing out
set_time_limit(0);
/* ** Set up functions ** */
// Calculate the next run time based on the frequency of iteration and the given time
function calculateRunTime($sFreq, $iTime) {
switch($sFreq){
case 'monthly':
$iDays = date('t');
$iDiff = (60*60)*24*$iDays;
break;
case 'weekly':
$iDiff = (60*60)*24*7;
break;
case 'daily':
$iDiff = (60*60)*24;
break;
case 'hourly':
$iDiff = (60*60);
break;
case 'half_hourly':
$iDiff = (60*30);
break;
case 'quarter_hourly':
$iDiff = (60*15);
break;
case '10mins':
$iDiff = (60*10);
break;
case '5mins':
$iDiff = (60*5);
break;
case '1min':
$iDiff = 60;
break;
case '30secs':
$iDiff = 30;
break;
case 'once':
$iDiff = 0;
break;
}
$iNextTime = $iTime + $iDiff;
return $iNextTime;
}
// Update the task information in the database
function updateTask($sTable, $aFieldValues, $iId) {
DBUtil::autoUpdate($sTable, $aFieldValues, $iId);
}
// Get the list of tasks due to be run from the database
function getTaskList($sTable) {
$now = date('Y-m-d H:i:s'); //time();
$query = "SELECT * FROM {$sTable}
WHERE is_complete = 0 AND run_time < '{$now}'";
$result = DBUtil::getResultArray($query);
if (PEAR::isError($result)){
exit();
}
return $result;
}
/* ** Scheduler script ** */
$sTable = 'scheduler_tasks';
// Get task list
$aList = getTaskList($sTable);
global $default;
// Loop through tasks and run
if(!empty($aList)){
foreach($aList as $item){
$aUpdate = array();
$iEnd = 0; $iStart = 0; $iDuration = 0;
$sFreq = ''; $sParameters = '';
$retval = TRUE;
// Set up start variables
$sTask = $item['task'];
$sTaskUrl = $item['script_url'];
$iDuration = $item['run_duration'];
$sFreq = $item['frequency'];
$sParameters = $item['script_params'];
// Check if script is windows or *nix compatible
$extArr = explode('.', $sTaskUrl);
$ext = array_pop($extArr);
$script = implode('.', $extArr);
if(OS_WINDOWS){
switch($ext){
case 'sh':
$sTaskUrl = $script.'.bat';
break;
case 'bin':
$sTaskUrl = $script.'.exe';
break;
}
}else{
switch($ext){
case 'bat':
if(file_exists(KT_DIR . $script.'.sh')){
$sTaskUrl = $script.'.sh';
break;
}
// File doesn't exist - log error
$default->log->error("Scheduler: Task script can't be found at ".KT_DIR."{$script}.sh");
continue;
break;
case 'exe':
if(file_exists(KT_DIR . $script)){
$sTaskUrl = $script;
break;
}
if(file_exists(KT_DIR . $script.'.bin')){
$sTaskUrl = $script.'.bin';
break;
}
// File doesn't exist - log error
$default->log->error("Scheduler: Task script can't be found at ".KT_DIR."{$script} or ".KT_DIR."{$script}.bin");
continue;
break;
}
}
$iTime = time();
$iStart = explode(' ', microtime());
// Run the script
$file = KT_DIR . $sTaskUrl;
$cmd = "\"$file\" {$sParameters}";
$start = KTUtil::getBenchmarkTime();
if (OS_WINDOWS)
{
$cmd = str_replace( '/','\\',$cmd);
$res = `"$cmd" 2>&1`;
}
else
{
$res = shell_exec($cmd." 2>&1");
}
if (!empty($res))
{
$default->log->info("Scheduler - Task: $sTask");
$default->log->info("Scheduler - Command: $cmd");
$default->log->info("Scheduler - Output: $res");
$default->log->info("Scheduler - Background tasks should not produce output. Please review why this is producing output.");
}
else
{
$time = number_format(KTUtil::getBenchmarkTime() - $start,2,'.',',');
$default->log->debug("Scheduler - Task: {$sTask} completed in {$diff}s.");
}
// On completion - reset run time
$iEnd = explode(' ', microtime());
$iDuration = ($iEnd[1] + $iEnd[0]) - ($iStart[1] + $iStart[0]);
$iDuration = round($iDuration, 3);
if(($sFreq == 'once' || empty($sFreq)) && $retval !== FALSE){
// Set is_complete to true
$aUpdate['is_complete'] = '1';
}else{
$iNextTime = calculateRunTime($sFreq, $iTime);
$aUpdate['run_time'] = date('Y-m-d H:i:s', $iNextTime);
}
$aUpdate['previous_run_time'] = date('Y-m-d H:i:s', $iTime);
$aUpdate['run_duration'] = $iDuration;
updateTask($sTable, $aUpdate, $item['id']);
// clear parameters
if(!empty($aParams)){
foreach($aParams as $param){
$aParam = explode('=', $param);
$$aParam[0] = '';
}
$aParam = array();
$aParams = array();
}
}
}
?>