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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 Krishnaprasad MG <[email protected]> |
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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 Sunspikes\Ratelimit\Throttle\Throttler; |
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use Sunspikes\Ratelimit\Cache\Adapter\CacheAdapterInterface; |
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use Sunspikes\Ratelimit\Cache\Exception\ItemNotFoundException; |
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class ElasticWindowThrottler implements RetriableThrottlerInterface, \Countable |
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{ |
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/* @var CacheAdapterInterface */ |
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protected $cache; |
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/* @var string */ |
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protected $key; |
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/* @var int */ |
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protected $limit; |
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/* @var int */ |
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protected $ttl; |
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/* @var int */ |
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protected $counter; |
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/** |
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* @param CacheAdapterInterface $cache |
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* @param string $key |
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* @param int $limit |
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* @param int $ttl |
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*/ |
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public function __construct(CacheAdapterInterface $cache, $key, $limit, $ttl) |
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{ |
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$this->cache = $cache; |
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$this->key = $key; |
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$this->limit = $limit; |
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$this->ttl = $ttl; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function access() |
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{ |
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4 |
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$status = $this->check(); |
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4 |
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$this->hit(); |
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return $status; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function hit() |
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{ |
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10 |
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$this->counter = $this->count() + 1; |
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$this->cache->set($this->key, $this->counter, $this->ttl); |
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return $this; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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2 |
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public function clear() |
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{ |
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$this->counter = 0; |
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$this->cache->set($this->key, $this->counter, $this->ttl); |
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return $this; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function count() |
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{ |
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if (!is_null($this->counter)) { |
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return $this->counter; |
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} |
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try { |
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$this->counter = $this->cache->get($this->key); |
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} catch (ItemNotFoundException $e) { |
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$this->counter = 0; |
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} |
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return $this->counter; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function check() |
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{ |
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return ($this->count() < $this->limit); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getTime() |
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{ |
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return $this->ttl; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getLimit() |
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{ |
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return $this->limit; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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1 |
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public function getRetryTimeout() |
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{ |
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1 |
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if ($this->check()) { |
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return 0; |
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} |
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1 |
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return 1e3 * $this->ttl; |
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} |
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} |
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sunspikes /
php-ratelimiter
