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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; |
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class Reactor |
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{ |
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/** @var Driver */ |
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private $driver; |
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/** @var Controller */ |
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private $controller; |
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/** @var \SplObjectStorage */ |
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private $active; |
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/** |
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* @param Driver $driver |
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* @param Controller $controller |
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*/ |
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public function __construct(Driver $driver, Controller $controller) |
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{ |
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$this->driver = $driver; |
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$this->controller = $controller; |
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$this->active = new \SplObjectStorage(); |
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} |
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/** |
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* @param Query $query |
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* @return Reactor |
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*/ |
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public function execQuery(Query $query) |
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{ |
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try { |
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$link = $this->controller->getLink($this->driver, $query); |
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if ($link) { |
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$this->driver->query($link, $query->getExpression()); |
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$this->active->attach($link, $query); |
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} |
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} catch (\Exception $err) { |
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$query->reject($err); |
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} |
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return $this; |
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} |
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/** |
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* @param \Iterator $iterator |
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* @return Reactor |
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*/ |
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public function execIterator(\Iterator $iterator) |
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{ |
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foreach ($iterator as $query) { |
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$this->execQuery($query); |
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} |
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return $this; |
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} |
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/** |
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* @param mixed $link |
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*/ |
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private function free($link) |
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{ |
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$query = $this->controller->getQuery($this->driver, $link); |
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if ($query) { |
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try { |
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$this->driver->query($link, $query->getExpression()); |
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$this->active->attach($link, $query); |
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} catch (\Exception $err) { |
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3 |
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$this->active->detach($link); |
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$query->reject($err); |
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} |
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} else { |
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$this->active->detach($link); |
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} |
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} |
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private function poll() |
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{ |
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$links = []; |
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foreach ($this->active as $link) { |
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$links[] = $link; |
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} |
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list($read, $error) = $this->driver->poll($links); |
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foreach ($error as $link) { |
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$query = $this->active[$link]; |
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$err = $this->driver->error($link); |
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$this->free($link); |
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$query->reject($err); |
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} |
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foreach ($read as $link) { |
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$query = $this->active[$link]; |
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try { |
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$result = $this->driver->read($link); |
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} catch (\Exception $err) { |
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$this->free($link); |
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$query->reject($err); |
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continue; |
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} |
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$this->free($link); |
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$subquery = $query->resolve($result); |
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if ($subquery instanceof Query) { |
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$this->execQuery($subquery); |
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} elseif ($subquery instanceof \Iterator) { |
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$this->execIterator($subquery); |
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} |
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} |
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} |
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public function await() |
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{ |
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while ($this->active->count()) { |
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$this->poll(); |
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} |
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} |
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} |
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Repo2 /
query-reactor
