Doctrine Entity Manager with PThreads and Symfony 4 - php

Question

I'm using php-zts to perform parallel data processing, using symfony 4 and PThreads
I'm great at running multiple threads, but I'm facing a problem, I need each of the threads to be able to work with doctrine
I need to make sure that each thread is able to work with doctrine
I tried to transfer a container instance directly, but it won't work because it can't be sterilized
/console_comand.php
private function gettingStatistics(){
$pool = new \Pool(4, Autoloader::class, ["vendor/autoload.php"]);
$store = new \Threaded();
$class = new Meta();
$pool->submit(new Task($class,$store));
$pool->collect();
$pool->shutdown();
$listQuotes = array();
foreach ($store as $obj){
foreach ($obj->{'response'} as $exchange => $data){
$listQuotes[$exchange] = $data;
}
}
unset($store);
unset($interface);
return $listQuotes;
}
/Autoloader.php
<?php
namespace App\Worker;
class Autoloader extends \Worker
{
protected $loader;
public function __construct($loader)
{
$this->loader = $loader;
}
/* включить автозагрузчик для задач */
public function run()
{
require_once($this->loader);
}
/* переопределить поведение наследования по умолчанию для нового потокового контекста */
public function start(int $options = PTHREADS_INHERIT_ALL)
{
return parent::start(PTHREADS_INHERIT_NONE);
}
}
/Autoloadable.php
<?php
namespace App\Worker;
/* нормальный, автоматически загруженный класс */
class Autoloadable
{
public $response;
public function __construct($greeting)
{
$this->response = $greeting->job();
}
}
/Task.php
<?php
namespace App\Worker;
class Task extends \Threaded
{
protected $greeting;
protected $result;
public function __construct($greeting,\Threaded $store)
{
$this->greeting = $greeting;
$this->result = $store;
}
public function run()
{
$greeting = new Autoloadable($this->greeting);
$this->result[] = $greeting;
}
}
how do I pass the right doctrine to be able to work with it from the job?
there's a very similar question on github but I can't deal with it.
https://github.com/krakjoe/pthreads/issues/369

Answer 1

Have you tried requiring an ObjectManager instance in the __construct of Task (your last code block)?
Have a read of this article
Cannot test it atm, don't have zts setup, but I've used this to great success in other projects.
I would expect you need to do something like:
$pool = new Pool(4);
for ($i = 0; $i < 15; ++$i) {
$pool->submit(new class($objectManager) extends \Threaded
{
private $objectManager;
public function __construct(ObjectManager $objectManager)
{
$this->objectManager= $objectManager;
}
public function run()
{
// obviously replace the contents of this function
$this->objectManager->performTask;
echo 'Job\'s done.' . PHP_EOL;
}
});
}
while ($pool->collect());
$pool->shutdown();
The instantiation of the new anonymous class takes the $objectManager present in your current instance, like /console_comand.php there, and passes it to this new anonymous class to fulfill the __construct requirements.
The linked article does a better job of explaining it than I do, so please give it a read.