Cache Engine

A multi-purpose cache engine PSR-6 and PSR-16 implementation with several drivers.

PSR-16

PSR-16 defines a Simple Cache interface with less verbosity than PSR-6. Below a list of engines available in this library that is PSR-16 compliant:

Class	Description
\ByJG\Cache\Psr16\NoCacheEngine	Do nothing. Use it for disable the cache without change your code
\ByJG\Cache\Psr16\ArrayCacheEngine	Local cache only using array. It does not persists between requests
\ByJG\Cache\Psr16\FileSystemCacheEngine	Save the cache result in the local file system
\ByJG\Cache\Psr16\MemcachedEngine	Uses the Memcached as the cache engine
\ByJG\Cache\Psr16\RedisCachedEngine	uses the Redis as cache
\ByJG\Cache\Psr16\SessionCachedEngine	uses the PHP session as cache
\ByJG\Cache\Psr16\ShmopCachedEngine	uses the shared memory area for cache

To create a new Cache Instance just create the proper cache engine and use it:

<?php
$cache = new \ByJG\Cache\Psr16\FileSystemCacheEngine();

// And use it:
if ($cache->has('key')) {
    // Do the complex code to get the value to be cached
    $object = callComplexCode();
    
    // Save to cache
    $cache->set('key', $object);
};
$object = $cache->get('key');

See more PSR-16 examples here

PSR-6

The PSR-6 implementation use the engines defined above. PSR-6 is more verbosity and have an extra layer do get and set the cache values.

You can use one of the factory methods to create a instance of the CachePool implementation:

<?php
$cachePool = \ByJG\Cache\Factory::createFilePool();

OR just create a new CachePool and pass to the constructor an instance of a PSR-16 compliant class:

$cachePool = new CachePool(new FileSystemCacheEngine());

See more PSR-6 examples here

List of Available Factory Commands

Note: All parameters are optional

Engine	Factory Command
No Cache	Factory::createNullPool($prefix, $bufferSize, $logger);
Array	Factory::createArrayPool($bufferSize, $logger);
File System	Factory::createFilePool($prefix, $bufferSize, $logger);
Memcached	Factory::createMemcachedPool($servers[], $bufferSize, $logger);
Session	Factory::createSessionPool($prefix, $bufferSize, $logger);
Redis	Factory::createRedisCacheEngine($server, $pwd, $bufferSize, $logger);
Shmop	Factory::createShmopPool($config[], $bufferSize, $logger);

The Common parameters are:

• logger: A valid instance that implement the LoggerInterface defined by the PSR/LOG
• bufferSize: the Buffer of CachePool
• prefix: A prefix name to compose the KEY physically
• servers: An array of memcached servers. E.g.: [ '127.0.0.1:11211' ]
• config: Specific setup for shmop. E.g.: [ 'max-size' => 524288, 'default-permission' => '0700' ]

Logging cache commands

You can add a PSR Log compatible to the constructor in order to get Log of the operations

See log examples here

Use a PSR-11 container to retrieve the cache keys

You can use a PSR-11 compatible to retrieve the cache keys. Once is defined, only the keys defined in the PSR-11 will be used to cache.

<?php
$fileCache = new \ByJG\Cache\Psr16\FileSystemCacheEngine()
$fileCache->withKeysFromContainer(new SomePsr11Implementation());

After the PSR-11 container is defined, when I run:

$value = $fileCache->get('my-key');

The key my-key will be retrieved from the PSR-11 container and the value retrieved will be used as the cache key. If it does not exist in the PSR-11 container, an exception will be thrown.

Install

Just type:

composer require "byjg/cache-engine"

Running Unit Testes

vendor/bin/phpunit --stderr

Note: the parameter --stderr after phpunit is to permit run the tests on SessionCacheEngine.

Dependencies

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Open source ByJG