Support Async Operations

[patricioe]

Add the ability to let Hector clients schedule an operation and return a Future object so that they can block waiting for the result further in the path.

Similar approach to what Cassandra does internally.

[ishan]

Is anybody working on this?

[benalexau]

Is this being worked on or planned?

[rditerwich]

I would opt for a listenable async interface, instead of or next to using the standard java futures. Java futures are not composable and pretty useless in a scala environment.