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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\WriteEvent; |
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use AsyncSockets\Operation\InProgressWriteOperation; |
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use AsyncSockets\Operation\OperationInterface; |
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use AsyncSockets\Operation\WriteOperation; |
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use AsyncSockets\RequestExecutor\EventHandlerInterface; |
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use AsyncSockets\RequestExecutor\ExecutionContext; |
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use AsyncSockets\RequestExecutor\Metadata\RequestDescriptor; |
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use AsyncSockets\RequestExecutor\RequestExecutorInterface; |
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use AsyncSockets\Socket\Io\IoInterface; |
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use AsyncSockets\Socket\SocketInterface; |
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/** |
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* Class WriteIoHandler |
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*/ |
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class WriteIoHandler extends AbstractOobHandler |
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{ |
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/** {@inheritdoc} */ |
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public function supports(OperationInterface $operation) |
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{ |
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return ($operation instanceof WriteOperation) || ($operation instanceof InProgressWriteOperation); |
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} |
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/** {@inheritdoc} */ |
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protected function handleOperation( |
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OperationInterface $operation, |
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RequestDescriptor $descriptor, |
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RequestExecutorInterface $executor, |
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EventHandlerInterface $eventHandler, |
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ExecutionContext $executionContext |
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) { |
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$socket = $descriptor->getSocket(); |
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/** @var WriteOperation $operation */ |
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$fireEvent = !($operation instanceof InProgressWriteOperation); |
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if ($fireEvent) { |
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$meta = $executor->socketBag()->getSocketMetaData($socket); |
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$event = new WriteEvent( |
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$operation, |
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$executor, |
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$socket, |
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$meta[ RequestExecutorInterface::META_USER_CONTEXT ] |
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); |
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$eventHandler->invokeEvent($event, $executor, $descriptor->getSocket(), $executionContext); |
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$nextOperation = $event->getNextOperation(); |
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} else { |
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$nextOperation = $operation; |
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} |
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$result = $this->writeDataToSocket($operation, $socket, $nextOperation, $bytesWritten); |
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$this->handleTransferCounter(RequestDescriptor::COUNTER_SEND_MIN_RATE, $descriptor, $bytesWritten); |
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return $result; |
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} |
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/** |
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* Perform data writing to socket and return suitable next socket operation |
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* |
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* @param WriteOperation $operation Current write operation instance |
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* @param SocketInterface $socket Socket object |
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* @param OperationInterface $nextOperation Desirable next operation |
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* @param int $bytesWritten Amount of written bytes |
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* |
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* @return OperationInterface Actual next operation |
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*/ |
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private function writeDataToSocket( |
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WriteOperation $operation, |
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SocketInterface $socket, |
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OperationInterface $nextOperation = null, |
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&$bytesWritten = null |
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) { |
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$result = $nextOperation; |
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$extractNextOperation = true; |
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$bytesWritten = 0; |
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$iterator = $this->resolveDataIterator($operation); |
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if ($iterator->valid()) { |
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$data = $iterator->current(); |
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$length = strlen($data); |
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$written = $socket->write($data, $operation->isOutOfBand()); |
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if ($length !== $written) { |
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$iterator->unread($length - $written); |
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} |
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$bytesWritten = $written; |
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$iterator->next(); |
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if ($iterator->valid()) { |
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$extractNextOperation = false; |
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$operation = $this->makeInProgressWriteOperation($operation, $nextOperation); |
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$result = $operation; |
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} |
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} |
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if ($extractNextOperation && ($operation instanceof InProgressWriteOperation)) { |
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/** @var InProgressWriteOperation $operation */ |
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$result = $operation->getNextOperation(); |
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} |
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return $result; |
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} |
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/** |
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* Marks write operation as in progress |
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* |
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* @param WriteOperation $operation Current operation object |
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* @param OperationInterface $nextOperation Next planned operation |
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* |
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* @return InProgressWriteOperation Next operation object |
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*/ |
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private function makeInProgressWriteOperation(WriteOperation $operation, OperationInterface $nextOperation = null) |
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{ |
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$result = $operation; |
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if (!($result instanceof InProgressWriteOperation)) { |
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$result = new InProgressWriteOperation($nextOperation, $operation->getData()); |
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} |
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return $result; |
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} |
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/** |
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* Return iterator for writing operation |
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* @param WriteOperation $operation The operation |
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* |
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* @return PushbackIterator |
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*/ |
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private function resolveDataIterator(WriteOperation $operation) |
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{ |
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$result = $operation->getData(); |
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if (!($result instanceof PushbackIterator)) { |
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$result = new PushbackIterator( |
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$this->dataToIterator($result), |
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IoInterface::SOCKET_BUFFER_SIZE |
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); |
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$result->rewind(); |
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$operation->setData($result); |
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} |
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return $result; |
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} |
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/** |
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* Converts data to Traversable object |
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* |
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* @param mixed $data Data to convert into object |
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* |
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* @return \Iterator |
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* @throws \LogicException If data can not be converted to \Traversable |
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*/ |
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private function dataToIterator($data) |
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{ |
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switch (true) { |
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case !is_object($data): |
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return new \ArrayIterator((array) $data); |
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case $data instanceof \Iterator: |
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return $data; |
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case $data instanceof \Traversable: |
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return new \IteratorIterator($data); |
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default: |
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throw new \LogicException( |
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sprintf( |
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'Trying to send unexpected data type %s', |
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is_object($data) ? get_class($data) : gettype($data) |
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) |
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); |
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} |
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} |
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/** |
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* @inheritDoc |
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*/ |
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protected function getHandlerType() |
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{ |
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return RequestDescriptor::RDS_WRITE; |
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} |
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} |
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edefimov /
async-sockets
