Add Guava extension

[jlouvel]

Now that we are based on Java 6, no reason to not consider integration with the popular Guava library: https://code.google.com/p/guava-libraries/

Potential features:

• HashingRepresentation
• CountingRepresentation
• Cache API to support our future CacheService

@Tembrel Do you have any other idea that would make such extension more useful?

[Tembrel]

What Guava provides is mostly orthogonal to Restlet, but here are a few more ideas:

• Easy way to add TaskService that implements ListeningExecutorService, to make Restlet-aware task execution with callbacks simple.
• Use Guava RateLimiter as part of a Filter to throttle request handling.
• Representations that work with ByteSinks, ByteSouces, CharSinks, and CharSources.
• Convert between ListMultimaps and Series.

[jlouvel]

Thanks Tim, that sounds valuable enough to me to justify a dedicated extension. Is this something you would be open to contribute to or even lead?

[Tembrel]

Sadly, I don't have any time to work on this. Best I can hope for is to comment on work in progress.

[jlouvel]

Fair enough! We'll keep you in the loop