PHP obtains the implementation code of background job management

复制代码 代码如下: 
class Controller_Jobs extends Controller_Base{ 
public function before(){ 
parent::before(); 
if(Request::$protocol != "cli"){ 
die("Only cli allowed!n"); 
} 
} 
public function after(){ 
parent::after(); 
//do some cleaning tasks 
} 
private function _execJobCommand($joburi,$paras){ 
$php_exec = Kohana::config("picsou.php_exec"); 
$php_index = APPINDEX; 
$command_args = array(); 
$command_args[] = $php_index; 
$command_args[] = "--uri=".$joburi; 
foreach ($paras as $para => $value){ 
$command_args[] = "--".$para."=".$value; 
} 
//var_dump($command_args);exit; 
echo "exec commmand:".$php_exec."n"; 
pcntl_exec($php_exec,$command_args); 
} 
/* 
* Running jobs in queues 
*/ 
public function action_run(){ 
$requestCount = 0; 
while(true){ 
$sql = "select * from job_queue where status='1' and approved='1' order by id"; 
$jobs = DB::query(Database::SELECT,$sql)->execute()->as_array(); 
if($jobs){ 
foreach ($jobs as $job){ 
$requestCount ++; 
//update the jobs status as running 
DB::update('job_queue')->set(array('status'=>'2')) 
->where('id','=',$job['id'])->execute(); 
$job_pid = pcntl_fork(); 
if($job_pid == -1){ 
die("Could not fork Child"); 
} else if($job_pid == 0 ){ 
$this->_execJobCommand($job['job_uri'],json_decode($job['paras'],true)); 
echo "finish Childn"; 
exit(0); 
//run jobs here 
} else{ 
echo "Waiting for jobn"; 
ob_flush(); 
$child_pid = pcntl_waitpid($job_pid,$status, WUNTRACED); 
echo "waitpid end:".$status."n"; 
if($status == 0){ 
//job completed 
DB::update('job_queue')->set(array('status'=>'999')) 
->where('id','=',$job['id'])->execute(); 
echo "Child Finishedn"; 
ob_flush(); 
}else{ 
DB::update('job_queue')->set(array('status'=>'-1')) 
->where('id','=',$job['id'])->execute(); 
echo "Child Failedn"; 
ob_flush(); 
} 
} 
} 
} 
else{ 
if($requestCount >=10){ 
echo "Have a rest, I have processed 10 jobsn"; 
exit; 
} 
//no job to run 
//echo "No jobn"; 
ob_flush(); 
sleep(5); 
} 
} 
} 
}