Gateway + ServiceActivator without poller

I like the way SI allows for making transparent proxies to channels using @Gateway and @ServiceActivator.

I was looking at http://ift.tt/1Cuujn4. There are two types of channels:

• Pollable (Queue, Priority, Rendezvous)


• Subscribable (Direct, Executor, PublishSubscribe)

Looking at these, it looks to me that all of these are made so that one of the below is true:

• The receiver polls


• The sender blocks


• The messages can be processed by multiple threads at once

Is there a way to configure / use SI in a way that:

• Sender sends to a queue and does not block (unless obviously the queue is full)


• Receiver takes from the queue, but does not poll

Pretty much like put / take from BlockingQueue from Java itself.

Am I overlooking some constraint here? Also, if there are other alternatives in Spring for what I'm trying to do (basically asynchronous event bus) with a similar interface (i.e. not having to manually send messages, but having it in a transparent way using interfaces), I'd be glad to hear about them.