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<?php |
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/** |
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* Async sockets |
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* |
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* @copyright Copyright (c) 2015-2017, Efimov Evgenij <[email protected]> |
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* |
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* This source file is subject to the MIT license that is bundled |
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* with this source code in the file LICENSE. |
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*/ |
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namespace AsyncSockets\RequestExecutor\Pipeline; |
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use AsyncSockets\Event\EventType; |
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use AsyncSockets\Exception\NetworkSocketException; |
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use AsyncSockets\Exception\SocketException; |
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use AsyncSockets\Operation\NullOperation; |
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use AsyncSockets\Operation\OperationInterface; |
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use AsyncSockets\RequestExecutor\ExecutionContext; |
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use AsyncSockets\RequestExecutor\IoHandlerInterface; |
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use AsyncSockets\RequestExecutor\Metadata\RequestDescriptor; |
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use AsyncSockets\RequestExecutor\RequestExecutorInterface; |
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/** |
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* Class IoStage |
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*/ |
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class IoStage extends AbstractTimeAwareStage |
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{ |
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/** |
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* Handlers for processing I/O |
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* |
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* @var IoHandlerInterface |
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*/ |
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private $ioHandler; |
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/** |
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* IoStage constructor. |
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* |
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* @param RequestExecutorInterface $executor Request executor |
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* @param EventCaller $eventCaller Event caller |
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* @param ExecutionContext $executionContext Execution context |
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* @param IoHandlerInterface $ioHandler Operation handler |
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*/ |
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public function __construct( |
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RequestExecutorInterface $executor, |
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EventCaller $eventCaller, |
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ExecutionContext $executionContext, |
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IoHandlerInterface $ioHandler |
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) { |
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parent::__construct($executor, $eventCaller, $executionContext); |
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$this->ioHandler = $ioHandler; |
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} |
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/** {@inheritdoc} */ |
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public function processStage(array $requestDescriptors) |
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{ |
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/** @var RequestDescriptor[] $requestDescriptors */ |
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$result = []; |
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foreach ($requestDescriptors as $descriptor) { |
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if (!$this->setConnectionFinishTime($descriptor)) { |
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$result[] = $descriptor; |
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continue; |
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} |
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$handler = $this->requireIoHandler($descriptor); |
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$nextOperation = $this->handleIoOperation($descriptor, $handler); |
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$isComplete = $this->resolveNextOperation($descriptor, $nextOperation); |
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if ($isComplete) { |
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$result[] = $descriptor; |
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} |
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} |
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return $result; |
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} |
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/** |
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* Resolves I/O operation type and process it |
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* |
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* @param RequestDescriptor $requestDescriptor Operation object |
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* |
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* @return IoHandlerInterface Flag, whether operation is complete |
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* @throws \LogicException |
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*/ |
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private function requireIoHandler(RequestDescriptor $requestDescriptor) |
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{ |
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$operation = $requestDescriptor->getOperation(); |
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if (!$this->ioHandler->supports($operation)) { |
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throw new \LogicException('There is no handler able to process ' . get_class($operation) . ' operation.'); |
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} |
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return $this->ioHandler; |
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} |
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/** |
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* Process I/O |
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* |
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* @param RequestDescriptor $requestDescriptor |
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* @param IoHandlerInterface $ioHandler |
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* |
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* @return OperationInterface |
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*/ |
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private function handleIoOperation(RequestDescriptor $requestDescriptor, IoHandlerInterface $ioHandler) |
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{ |
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try { |
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$this->eventCaller->setCurrentOperation($requestDescriptor); |
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$result = $ioHandler->handle( |
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$requestDescriptor->getOperation(), |
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$requestDescriptor, |
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$this->executor, |
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$this->eventCaller, |
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$this->executionContext |
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); |
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$this->eventCaller->clearCurrentOperation(); |
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return $result ?: NullOperation::getInstance(); |
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} catch (NetworkSocketException $e) { |
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$this->callExceptionSubscribers($requestDescriptor, $e); |
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return NullOperation::getInstance(); |
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} |
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} |
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/** |
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* Fill next operation in given object and return flag indicating whether operation is required |
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* |
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* @param RequestDescriptor $requestDescriptor Request descriptor object |
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* @param OperationInterface $nextOperation Next operation object |
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* |
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* @return bool True if given operation is complete |
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*/ |
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private function resolveNextOperation( |
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RequestDescriptor $requestDescriptor, |
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OperationInterface $nextOperation |
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) { |
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if ($nextOperation instanceof NullOperation) { |
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$requestDescriptor->setOperation($nextOperation); |
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return true; |
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} |
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if ($requestDescriptor->getOperation() === $nextOperation) { |
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return false; |
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} |
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$requestDescriptor->setOperation($nextOperation); |
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$requestDescriptor->setMetadata( |
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[ |
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RequestExecutorInterface::META_LAST_IO_START_TIME => null, |
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] |
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); |
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return false; |
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} |
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/** |
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* Set connection finish time and fire socket if it was not connected |
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* |
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* @param RequestDescriptor $requestDescriptor |
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* |
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* @return bool True, if there was no error, false if operation should be stopped |
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*/ |
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private function setConnectionFinishTime(RequestDescriptor $requestDescriptor) |
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{ |
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$meta = $requestDescriptor->getMetadata(); |
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$wasConnected = $meta[ RequestExecutorInterface::META_CONNECTION_FINISH_TIME ] !== null; |
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$this->setSocketOperationTime($requestDescriptor, RequestExecutorInterface::META_CONNECTION_FINISH_TIME); |
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if (!$wasConnected) { |
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$event = $this->createEvent($requestDescriptor, EventType::CONNECTED); |
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try { |
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$this->callSocketSubscribers($requestDescriptor, $event); |
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} catch (SocketException $e) { |
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$this->callExceptionSubscribers($requestDescriptor, $e); |
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return false; |
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} |
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} |
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return true; |
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} |
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} |
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|
edefimov /
async-sockets
