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<?php |
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/** |
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* The MIT License (MIT) |
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* |
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* Copyright (c) 2015 Repo2 |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy |
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* of this software and associated documentation files (the "Software"), to deal |
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* in the Software without restriction, including without limitation the rights |
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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* copies of the Software, and to permit persons to whom the Software is |
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* furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included in all |
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* copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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*/ |
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namespace Repo2\QueryReactor\Controller; |
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use Repo2\QueryReactor\Controller; |
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use Repo2\QueryReactor\Driver; |
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use Repo2\QueryReactor\Query; |
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class PoolingController implements Controller |
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{ |
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/** @var array */ |
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private $params; |
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/** @var \SplObjectStorage */ |
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private $pool; |
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/** @var \SplQueue */ |
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private $idle; |
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/** @var \SplQueue */ |
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private $waiting; |
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/** |
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* @param array $params |
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*/ |
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public function __construct(array $params) |
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{ |
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$this->params = $params + [ |
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'max_connections' => 10, |
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'username' => null, |
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'passwd' => null |
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]; |
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$this->pool = new \SplObjectStorage(); |
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$this->idle = new \SplQueue(); |
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$this->waiting = new \SplQueue(); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function getLink(Driver $driver, Query $query) |
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{ |
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if (!$this->idle->isEmpty()) { |
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return $this->idle->dequeue(); |
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} |
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if ($this->pool->count() >= $this->params['max_connections']) { |
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$this->waiting->enqueue($query); |
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return false; |
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} |
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$link = $driver->connect($this->params, $this->params['username'], $this->params['passwd']); |
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$this->pool->attach($link); |
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return $link; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function getQuery(Driver $driver, $link) |
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{ |
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if (!$this->pool->contains($link)) { |
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throw new \OutOfBoundsException(sprintf('Undefined %s in the pooling controller.', $driver->info($link))); |
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} |
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if (!$this->waiting->isEmpty()) { |
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return $this->waiting->dequeue(); |
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} |
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$this->idle->enqueue($link); |
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} |
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} |
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Repo2 /
query-reactor
