ScotlandPHP

The Worker class

(PECL pthreads >= 2.0.0)

Introduction

Worker Threads have a persistent context, as such should be used over Threads in most cases.

When a Worker is started, the run method will be executed, but the Thread will not leave until one of the following conditions are met:

  • the Worker goes out of scope (no more references remain)

  • the programmer calls shutdown

  • the script dies

This means the programmer can reuse the context throughout execution; placing objects on the stack of the Worker will cause the Worker to execute the stacked objects run method.

Class synopsis

Worker extends Thread implements Traversable , Countable , ArrayAccess {
/* Methods */
public int collect ([ Callable $collector ] )
public int getStacked ( void )
public bool isShutdown ( void )
public boolean isWorking ( void )
public bool shutdown ( void )
public int stack ( Threaded &$work )
public int unstack ( void )
/* Inherited methods */
public void Thread::detach ( void )
public integer Thread::getCreatorId ( void )
public static Thread Thread::getCurrentThread ( void )
public static integer Thread::getCurrentThreadId ( void )
public integer Thread::getThreadId ( void )
public static mixed Thread::globally ( void )
public boolean Thread::isJoined ( void )
public boolean Thread::isStarted ( void )
public boolean Thread::join ( void )
public void Thread::kill ( void )
public boolean Thread::start ([ integer $options ] )
}

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User Contributed Notes 1 note

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event2game at gmail dot com
3 years ago
There's one way to shared datas between Workers, that is using Stackable:
<?php
class data extends Stackable{
   
//private $name;
   
public function __construct($_name) {
       
//$this->name = $_name;//if you set any variable, workers will get the variable, so do not set any variable
       
echo __FILE__.'-'.__LINE__.'<br/>'.chr(10);
    }
    public function
run(){
        echo
__FILE__.'-'.__LINE__.'<br/>'.chr(10);
    }
}
class
readWorker extends Worker {
    public function
__construct(&$_data) {
       
$this->data = $_data;//
   
}
    public function
run(){
        while(
1){
            if(
$arr=$this->data->shift())//receiving datas
           
{
                echo
'Received data:'.print_r($arr,1).chr(10);
            }else
usleep(50000);
        }
    }
}
class
writeWorker extends Worker {
    public function
__construct(&$_data) {
       
$this->data = $_data;//
   
}
    public function
run(){
        while(
1){
           
$this->data[] = array(time(),rand());//writting datas
           
usleep(rand(50000, 1000000));
        }
    }

}
$data = new data('');
$reader = new readWorker($data);
$writer = new writeWorker($data);
$reader->start();
$writer->start();
?>
Also you can use $readWorker[] = $some_data; then use $this->shift() in readWorker to share datas with readWorker, but if you do so you can't have variables in readWorker as all variales will be shift by shift();
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