Added a key normalizer

[Nyholm]

Added class for normalize keys. This will fix php-cache/issues#49

[codecov-io]

Current coverage is 21.91%

Merging #56 into master will increase coverage by +0.43% as of ea08a81

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Review entire Coverage Diff as of ea08a81

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[cryptiklemur]

I'm not sure this is entirely the best idea.... If we go this route, it should be togglable, and disabled by default.

[Nyholm]

Hm, but we should do something to prevent invalid chars. See php-cache/issues#49

Im open to suggestions.

[cryptiklemur]

The issue we run into, is changing people's keys on the fly, without telling them. Could lead to issues where people check for the keys, and not being able to find them.

I think, if we made this togglable, it'd be fine. So the user would specifically have to ask for cleaned keys

[Nyholm]

Okej. So it is the migration you are worried about? Not the solution?

I think migration is not going to be a problem. This PR is only removing invalid keys (ref). This will only avoid an exception from being thrown. Nobody will get a stored key changed.

[PaddyLock]

Hi, I have recently updated my set of packages to include this fix:

"cache/doctrine-adapter": "0.5.",
"cache/psr-6-doctrine-bridge": "2.1.",
"cache/cache-bundle": "0.4.3",
"cache/adapter-bundle": "0.3.",
"cache/memcached-adapter": "0.3.",
"cache/taggable-cache": "0.4.*",
"cache/hierarchical-cache": "0.2.1",
"cache/adapter-common": "0.3.0"

However, I still get the following error when clearing my cache

Invalid key: "[Helios\CoreBundle\Entity\User$CLASSMETADATA][1]". The key contains one or more characters reserved for future extension: {}()/\@:

I have also tried with this set of packages:

"cache/psr-6-doctrine-bridge": "dev-master",
"cache/cache-bundle": "dev-master",
"cache/adapter-bundle": "dev-master",
"cache/memcached-adapter": "dev-master",

but I get this error:

Warning: call_user_func_array() expects parameter 1 to be a valid callback, class 'Cache\Adapter\Memcached\MemcachedCachePool' does not have a method 'clearTags'

My config looks like this:

cache:
  doctrine:
    enabled: true
    use_tagging: true
    metadata:
      service_id: 'cache.provider.default_memcached'
      entity_managers:   [ default ]       # the name of your entity_manager connection
      document_managers: [ default ]       # the name of your document_manager connection
    result:
      service_id: 'cache.provider.default_memcached'
      entity_managers:   [ default, read ] # you may specify multiple entity_managers
    query:
      service_id: 'cache.provider.default_memcached'
      entity_managers: [ default ]
  router:
    enabled: true
    service_id: cache.provider.default_memcached
    ttl: 86400