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Added a "system sort" process which sorts cases and the sample file from enabled questionnaires periodically (based on SYSTEM_SORT_MINUTES config directive). Enabling this may improve performance where there is a large number of interviewers, a large sample or complex quotas as the sort doesn't need to be done for each interviewer at each case.

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Allow for multiple background processes to run concurrently
This commit is contained in:
azammitdcarf
2011-02-01 05:27:55 +00:00
parent 5eb15f0450
commit 1ffb93df13
7 changed files with 428 additions and 82 deletions
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19
functions/functions.process.php
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@@ -43,15 +43,17 @@ include_once(dirname(__FILE__).'/../db.inc.php');
/**
* Determine if a process is already running
*
* @param int $type Defaults to 1 - specify the process type (class) to search for
* @return bool|int Return false if no process already running, else return the process_id
*/
function is_process_running()
function is_process_running($type = 1)
{
global $db;
$sql = "SELECT `process_id`
FROM `process`
WHERE `stop` IS NULL";
WHERE `stop` IS NULL
AND type = '$type'";
$rs = $db->GetRow($sql);
@@ -90,23 +92,24 @@ function is_process_killed($process_id)
* Start a process
*
* @param string $filename The PHP file of the process to run
* @param int $type The type (class) of process (so we can run multiple processes at the same time) defaults to 1
* @return bool|int False if we couldnt start a process, else the process id from the process table
*
* @link http://www.djkaty.com/php/fork Cross platform process tutorial (this code adapted from here)
*/
function start_process($filename)
function start_process($filename,$type = 1)
{
//create a record only if no process already running
global $db;
$db->StartTrans();
$process = is_process_running();
$process = is_process_running($type);
if ($process == false)
{
$sql = "INSERT INTO `process` (`process_id`,`start`,`stop`,`kill`,`data`)
VALUES (NULL,CONVERT_TZ(NOW(),'System','UTC'),NULL,0,'')";
$sql = "INSERT INTO `process` (`process_id`,`type`,`start`,`stop`,`kill`,`data`)
VALUES (NULL,'$type',CONVERT_TZ(NOW(),'System','UTC'),NULL,0,'')";
$rs = $db->Execute($sql);
$args = $db->Insert_ID();
@@ -220,15 +223,17 @@ function process_get_data($process_id)
/**
* Get data from the last process run
*
* @param int $type The last processes class (type) defaults to 1
* @return string Data from the last process, or an empty string if not available
*
*/
function process_get_last_data()
function process_get_last_data($type = 1)
{
global $db;
$sql = "SELECT `data`
FROM `process`
WHERE type = '$type'
ORDER BY `process_id` DESC
LIMIT 1";