Provide dynamic invocation with kwargs deserialization

[pangiole]

You can register a procedure URI with a partially applied function as handler.

val registration: Future[Registration] = session.flatMap(
  _.register(
    procedure = "myapp.procedure.sum",
    handler = sum _ ))

Akka Wamp will dinamically invoke the partially applied function you provide (e.g. sum _) upon receiving invocations addressed to the registered procedure URI (e.g. "myapp.procedure.sum"). It will lazily deserialize the args list from incoming payloads by using its default type bindings.

Notice
Lazy deserialization from incoming kwargs and dynamic invocation passing input values to named arguments is not yet supported

[pangiole]

Having the following registration in place:

def sum(a: Int, b: Int) = a + b

val registration: Future[Registration] = session.flatMap(
  _.register(
    procedure = "myapp.procedure.sum",
    handler = sum _ ))

// registration.id == 4

The the following JSON invocation message:

[68,9,4,{},[],{"a":45,"b":25}]

would make AkkaWamp invoke sum(45, 25)