Get periodic messages into MemBus

27 Dec 2013 in software-development | membus |

In the previous post introducing MemBus v3 I mentioned that I removed a project in the solution that contained code to help setting up the creation of periodic messages - once I probed the Rx-codebase a little more I found that there is support to set up Observables that create output periodically - so here’s a (very) short post on how you combine that with MemBus. First, go forth and make yourself a bus - don’t forget to setup the flexible subscribe adapter. The provided lambda returns true for all method candidates (I realize that this screams for an overload).

readonly IBus _bus = BusSetup
    .Apply<FlexibleSubscribeAdapter>(cfg => cfg.RegisterMethods(info => true))

As an example, let’s have a class that provides timers for our application - the example shown sends out a MessageA instance 5 times every 100 milliseconds on the Default Scheduler (according to documentation the most appropriate strategy on the targetted system that does not block the current thread).

private class Timers
    public IObservable<MessageA> ASignal()
        return Observable
        .Timer(TimeSpan.FromMilliseconds(10), TimeSpan.FromMilliseconds(100), Scheduler.Default)
        .Select(_ => new MessageA());

Providing the observable to MemBus is as easy as saying…

_bus.Subscribe(new Timers());

and obtaining the messages could look like

using (_bus.Subscribe((MessageA _) => cd.Signal()))
	// Blabla

I agree that this hardly merits a post, yet sometimes it’s nice to see that something is as easy as eating an oven pizza.


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