Promise

Promise context is an opaque type backed by scala.concurrent.ExecutionContext, esentially they are the same thing

Thus value promise uses Scala concurrency framework for execution

Promise control provides the ability to "complete" the controlled promise instance.

For each promise, there is a control, which is not part of promise API, it is a behind the scenes handle for code fulfilling the promise.

Promise control provides the ability to "complete" the controlled promise instance.

For each promise, there is a control, which is not part of promise API, it is a behind the scenes handle for code fulfilling the promise.