scheduler.php
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<?php
/**
* $Id:
*
* The contents of this file are subject to the KnowledgeTree Public
* License Version 1.1.2 ("License"); You may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.knowledgetree.com/KPL
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.
* See the License for the specific language governing rights and
* limitations under the License.
*
* All copies of the Covered Code must include on each user interface screen:
* (i) the "Powered by KnowledgeTree" logo and
* (ii) the KnowledgeTree copyright notice
* in the same form as they appear in the distribution. See the License for
* requirements.
*
* The Original Code is: KnowledgeTree Open Source
*
* The Initial Developer of the Original Code is The Jam Warehouse Software
* (Pty) Ltd, trading as KnowledgeTree.
* Portions created by The Jam Warehouse Software (Pty) Ltd are Copyright
* (C) 2007 The Jam Warehouse Software (Pty) Ltd;
* All Rights Reserved.
* Contributor( s): ______________________________________
*
*/
require_once('../config/dmsDefaults.php');
require_once(KT_LIB_DIR . '/database/dbutil.inc');
// Set the time limit to 0 to prevent the script timing out
set_time_limit(0);
/* ** Set up functions ** */
// Calculate the next run time based on the frequency of iteration and the given time
function calculateRunTime($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 '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);
// Loop through tasks and run
if(!empty($aList)){
foreach($aList as $item){
$aUpdate = array();
$iEnd = 0; $iStart = 0; $iDuration = 0;
$sFreq = ''; $sParameters = '';
// Set up start variables
$sTask = $item['task'];
$sTaskUrl = $item['script_url'];
$iDuration = $item['run_duration'];
$sFreq = $item['frequency'];
$sParameters = $item['script_params'];
$iTime = time();
$iStart = explode(' ', microtime());
// Set up parameters for use by the script
$aParams = explode('|', $sParameters);
foreach($aParams as $param){
$aParam = explode('=', $param);
if(!empty($aParam)){
$$aParam[0] = $aParam[1];
}
}
// Run the script
include(KT_DIR . $sTaskUrl);
// On completion - reset run time
$iEnd = explode(' ', microtime());
$iDuration = ($iEnd[1] + $iEnd[0]) - ($iStart[1] + $iStart[0]);
$iDuration = round($iDuration, 3);
if($sFreq == 'once' || empty($sFreq)){
// Set is_complete to true
$aUpdate['is_complete'] = '1';
}else{
$iNextTime = calculateRunTime($sFreq, $iTime);
$aUpdate['run_time'] = date('Y-m-d H:i:s', $iNextTime);
}
$aUpdate['previous_run_time'] = date('Y-m-d H:i:s', $iTime);
$aUpdate['run_duration'] = $iDuration;
updateTask($sTable, $aUpdate, $item['id']);
// clear parameters
if(!empty($aParams)){
foreach($aParams as $param){
$aParam = explode('=', $param);
$$aParam[0] = '';
}
$aParam = array();
$aParams = array();
}
}
}
?>