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142 lines (123 loc) · 3.87 KB
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<?php
/*
* This file is part of php-task library.
*
* (c) php-task
*
* This source file is subject to the MIT license that is bundled
* with this source code in the file LICENSE.
*/
namespace Task\TaskBundle\Executor;
use Task\Execution\TaskExecutionInterface;
use Task\Executor\ExecutorInterface;
use Task\Executor\FailedException;
use Task\Executor\RetryTaskHandlerInterface;
use Task\Handler\TaskHandlerFactoryInterface;
use Task\Storage\TaskExecutionRepositoryInterface;
/**
* Uses a separate process to start the executions via console-command.
*/
class SeparateProcessExecutor implements ExecutorInterface
{
/**
* @var TaskHandlerFactoryInterface
*/
private $handlerFactory;
/**
* @var TaskExecutionRepositoryInterface
*/
private $executionRepository;
/**
* @var ExecutionProcessFactory
*/
private $processFactory;
/**
* @param TaskHandlerFactoryInterface $handlerFactory
* @param TaskExecutionRepositoryInterface $executionRepository
* @param ExecutionProcessFactory $processFactory
*/
public function __construct(
TaskHandlerFactoryInterface $handlerFactory,
TaskExecutionRepositoryInterface $executionRepository,
ExecutionProcessFactory $processFactory
) {
$this->handlerFactory = $handlerFactory;
$this->executionRepository = $executionRepository;
$this->processFactory = $processFactory;
}
/**
* {@inheritdoc}
*/
public function execute(TaskExecutionInterface $execution)
{
$attempts = $this->getMaximumAttempts($execution->getHandlerClass());
$lastException = null;
for ($attempt = 0; $attempt < $attempts; ++$attempt) {
try {
return $this->handle($execution);
} catch (FailedException $exception) {
throw $exception;
} catch (SeparateProcessException $exception) {
if ($execution->getAttempts() < $attempts) {
$execution->incrementAttempts();
$this->executionRepository->save($execution);
}
$lastException = $exception;
}
}
// maximum attempts to pass executions are reached
throw new FailedException($lastException);
}
/**
* Returns maximum attempts for specified handler.
*
* @param string $handlerClass
*
* @return int
*/
private function getMaximumAttempts($handlerClass)
{
$handler = $this->handlerFactory->create($handlerClass);
if (!$handler instanceof RetryTaskHandlerInterface) {
return 1;
}
return $handler->getMaximumAttempts();
}
/**
* Handle execution by using console-command.
*
* @param TaskExecutionInterface $execution
*
* @return string
*
* @throws FailedException
* @throws SeparateProcessException
*/
private function handle(TaskExecutionInterface $execution)
{
$process = $this->processFactory->create($execution->getUuid());
$process->run();
if (!$process->isSuccessful()) {
throw $this->createException($process->getErrorOutput());
}
return $process->getOutput();
}
/**
* Create the correct exception.
*
* FailedException for failed executions.
* SeparateProcessExceptions for any exception during execution.
*
* @param string $errorOutput
*
* @return FailedException|SeparateProcessException
*/
private function createException($errorOutput)
{
if (0 !== strpos($errorOutput, FailedException::class)) {
return new SeparateProcessException($errorOutput);
}
$errorOutput = trim(str_replace(FailedException::class, '', $errorOutput));
return new FailedException(new SeparateProcessException($errorOutput));
}
}