camel-cache - Ability to set an Element's ttl and perhaps other properties when performing an add would be nice.

Currently it's possible to set a TTL at the cache level but there is no way to override this value at the Element.

I propose adding some headers for controlling this behavior. Something along the lines of:

CamelCacheTimeToLive (seconds)
CamelCacheTimeToIdle (seconds)
CamelCacheEternal (boolean)

These values would apply to the ADD and UPDATE operations.

I'll look at creating a patch.