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<?php

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/**

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* CakePHP(tm) : Rapid Development Framework (https://cakephp.org)

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* Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)

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* Licensed under The MIT License

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* For full copyright and license information, please see the LICENSE.txt

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* Redistributions of files must retain the above copyright notice.

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* @copyright Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)

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* @link https://cakephp.org CakePHP(tm) Project

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* @since 3.7.0

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* @license https://opensource.org/licenses/mit-license.php MIT License

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namespace Cake\Cache;

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/**

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* Interface for cache engines that defines methods

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* outside of the PSR16 interface that are used by `Cache`.

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* Internally Cache uses this interface when calling engine

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* methods.

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* @since 3.7.0

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interface CacheEngineInterface

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{

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/**

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* Write data for key into a cache engine if it doesn't exist already.

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* @param string $key Identifier for the data.

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* @param mixed $value Data to be cached - anything except a resource.

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* @return bool True if the data was successfully cached, false on failure.

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* Or if the key existed already.

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public function add($key, $value);

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/**

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* Increment a number under the key and return incremented value

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* @param string $key Identifier for the data

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* @param int $offset How much to add

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* @return int|false New incremented value, false otherwise

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public function increment($key, $offset = 1);

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/**

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* Decrement a number under the key and return decremented value

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* @param string $key Identifier for the data

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* @param int $offset How much to subtract

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* @return int|false New incremented value, false otherwise

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public function decrement($key, $offset = 1);

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/**

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* Clear all values belonging to the named group.

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* Each implementation needs to decide whether actually

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* delete the keys or just augment a group generation value

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* to achieve the same result.

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* @param string $group name of the group to be cleared

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* @return bool

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public function clearGroup($group);

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}

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