...

Motivation

...

Futures

Async APIs should return a new kind of future: 

IgniteClientFuture<T> extends Future<T>, CompletionStage<T>

This future simply wraps CompletableFuture, which is a current standard for async Java APIs. We do not want to return CompletableFuture directly, because it is a class and it provides methods to complete it from outside.

ClientCompute#executeAsync returns plain j.u.c.Future, which does not provide completion callbacks or chaining, this should be changed (deprecate old method and create a new one).

...