nwolverson / purescript-erl-simplebus

purescript-erl-simplebus

Very simple message bus built on top of Gproc (and as such that dependency needs adding to rebar.config)

Defining a bus and message type

    data BookEvent = BookCreated Isbn
               | BookUpdated Isbn
               | BookDeleted Isb

    bus :: SimpleBus.Bus String BookEvent
    bus = SimpleBus.bus "book_library"

Sending Messages on the bus

   SimpleBus.raise bus (BookCreated book.isbn)
   

Subscribing to Messages

  _ <- SimpleBus.subscribe BookLibrary.bus handleMessage
  
  handleMessage :: BookEvent :: Effect Unit
  handleMessage ev = pure unit