Implement Closable interface

[Khazrak]

Channel and Connection can implement the Closable interface, the close()-method is already implemented. This will open up the possibility to compile with Java 7 and use the try-with-resource function to avoid try-catch in finally-block of close

[michaelklishin]

I think you are confusing Closable with AutoCloseable, which is used by try-with-resource. In any case, we cannot require JDK 7 yet. We will be able to once Spring drops JDK 6 compatibility.

[michaelklishin]

We don't have a tag for will be fixed eventually but the time hasn't come yet and we try to keep issues only to things that are actionable in the next release or two. Here we can't really know when we'd be able to do this => closing.

[Khazrak]

Closable is JDK 6 and in JDK 7 Closeable extends AutoCloseable, so it would come automatically with the switch. This would also mean that one could download the source and just compile it with JDK 7 and get AutoCloseable

[michaelklishin]

Fair enough. @Khazrak feel free to submit a PR against master.

[michaelklishin]

Fixed in #133 and will be out with 3.7.0, thank you, @Khazrak!