filhodanuvem / Tardis

Cache almost anything, without almost any change on your code.

Computaria\Tardis: Cache made easier

Cache stuff with almost no modification on your code:

<?php

use Computaria\Tardis;
use MyApp\Repository;

$apc = new Doctrine\Common\Cache\ApcCache;
$tardis = new Tardis\Factory::grow($apc);

$slowRepository = new Repository\Country;
$fastRepository = $tardis->cacheCallsFrom($slowRepository);

$brazil = $fastRepository->findByCode('BR');

Requirements: PHP >= 5.5

What happened above:

1. $apc is our cache storage.
2. $tardis is a factory of proxies, caching into $apc.
3. $tardis->cacheCallsFrom() creates a new object which will cache and retrieve results from it.

What cache storages are available?

Many:

• Apc
• Couchbase
• Filesystem
• Memcache
• MongoDB
• Redis
• Riak
• SQLite
• WinCache
• ZendData
• XCache

Tardis limitations

• We can't cache final classes.
• We only cache public method calls.
• Methods which accept non-serializable arguments can't be cached automagically.

FAQ

Will the cache-enabled object Tardis create be of the same instance from the original object?

Yes. The object created will be from a new class extending your original class.

Isn't creating a class on the fly expensive and slow?

Yes, although not as slow as you might think and it is only a once in a time operation.

How are you sure of what cache key to retrieve?

To create a cache key we use Full\Class\Name::methodName and serialize all its arguments, in order to have a unique identity to that call.

If a method, of the same calss and with the same arguments, return different things you are in trouble.

How do I expire a cache entry?

You should use Doctrine\Cache, or your own cache storage configuration for that.

We are working on solutions for that. Have an idea? Help us!