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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; under version 2 |
| 7 | * of the License (non-upgradable). |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 17 | * |
| 18 | * Copyright (c) 2017 (original work) Open Assessment Technologies SA (under the project TAO-PRODUCT); |
| 19 | * |
| 20 | */ |
| 21 | |
| 22 | namespace oat\taoTaskQueue\model\QueueBroker; |
| 23 | |
| 24 | use oat\tao\model\taskQueue\Queue\Broker\AbstractQueueBroker; |
| 25 | use oat\tao\model\taskQueue\Task\TaskInterface; |
| 26 | |
| 27 | /** |
| 28 | * Stores tasks in memory. It accomplishes Sync Queue mechanism. |
| 29 | * |
| 30 | * @deprecated Use \oat\tao\model\taskQueue\Queue\Broker\InMemoryQueueBroker |
| 31 | * |
| 32 | * @author Gyula Szucs <gyula@taotesting.com> |
| 33 | */ |
| 34 | class InMemoryQueueBroker extends AbstractQueueBroker implements SyncQueueBrokerInterface |
| 35 | { |
| 36 | /** |
| 37 | * @var \SplQueue |
| 38 | */ |
| 39 | private $queue; |
| 40 | |
| 41 | /** |
| 42 | * @return \SplQueue |
| 43 | */ |
| 44 | private function getQueue() |
| 45 | { |
| 46 | if (is_null($this->queue)) { |
| 47 | $this->createQueue(); |
| 48 | } |
| 49 | return $this->queue; |
| 50 | } |
| 51 | |
| 52 | /** |
| 53 | * Initiates the SplQueue |
| 54 | */ |
| 55 | public function createQueue() |
| 56 | { |
| 57 | $this->queue = new \SplQueue(); |
| 58 | $this->logDebug('Memory Queue created'); |
| 59 | } |
| 60 | |
| 61 | /** |
| 62 | * @return int |
| 63 | */ |
| 64 | public function count() |
| 65 | { |
| 66 | return $this->getQueue()->count(); |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * @param TaskInterface $task |
| 71 | * @return bool |
| 72 | */ |
| 73 | public function push(TaskInterface $task) |
| 74 | { |
| 75 | $this->getQueue()->enqueue($this->serializeTask($task)); |
| 76 | |
| 77 | return true; |
| 78 | } |
| 79 | |
| 80 | /** |
| 81 | * Overwriting the parent totally because in this case we need a much simpler logic for popping messages. |
| 82 | * |
| 83 | * @return mixed|null |
| 84 | */ |
| 85 | public function pop() |
| 86 | { |
| 87 | if (!$this->count()) { |
| 88 | return null; |
| 89 | } |
| 90 | |
| 91 | $task = $this->getQueue()->dequeue(); |
| 92 | |
| 93 | return $this->unserializeTask($task, ''); |
| 94 | } |
| 95 | |
| 96 | /** |
| 97 | * Do nothing. |
| 98 | */ |
| 99 | protected function doPop() |
| 100 | { |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * Do nothing, because dequeue automatically deletes the message from the queue |
| 105 | * |
| 106 | * @param TaskInterface $task |
| 107 | */ |
| 108 | public function delete(TaskInterface $task) |
| 109 | { |
| 110 | } |
| 111 | |
| 112 | /** |
| 113 | * Do nothing. |
| 114 | * |
| 115 | * @param string $receipt |
| 116 | * @param array $logContext |
| 117 | */ |
| 118 | protected function doDelete($receipt, array $logContext = []) |
| 119 | { |
| 120 | } |
| 121 | } |