Hey Esteban, Since you seem to need to scale to 1000s of concurrent connections, I would go for option 2. RabbitMQ will then work as a demultiplexer and you gain options for using more than one Pharo worker for processing traffic, if that ever becomes necessary.
BTW, I never heard of MQTT and it seems pretty interesting, thanks ! I will read about it tonight. Sven > On 19 Nov 2014, at 19:06, Esteban A. Maringolo <emaring...@gmail.com> wrote: > > Hi, > > I'll be needing to add bidirectional messaging to our current Android (Java) > application, and as usual I'm expecting to manage the server side of the > communication with Pharo. > > I'm evaluating two alternatives, but I'm in open to other, proven, options. > > Option 1. WebSockets > Open a WebSocket on each device, and push/retrieve messages from each of > these, tracking the device id if I need to recreate a new socket (avoiding > recreating new sockets in case of connectivity issues, very common). > > Option 2. MQTT [1] > This is basically a mobile oriented MQ, super low footprint on mobile. > For what I saw, I could implement the server using an intermediate MQ > (RabbitMQ) and use STOMP to connect to it. > > Option 3. XMPP [3] > Provides several features I'll need in the future, like file transfer in > addition to regular text messaging. It is very well supported in Android with > Smack [4], but I don't know if we have a Pharo server for it, or if somebody > ever played with it. > > By means of simplicity and use load I favor option 1, because I can > understand it better, and as everything moves towards web based technologies, > I could implement WAMP [5] on top of that in the future. > > Right now I'd need to have a hundred websockets opened at the same time, > which doesn't sound like a heavy load to me, but I certainly don't know. In > the future it could be an order of magnitude bigger, and that's why I don't > discard more complex solutions like XMPP or MQTT. > > Regards! > > > [1] http://mqtt.org/ > [2] https://github.com/svenvc/docs/blob/master/neo/stamp.md > [3] http://xmpp.org/ > [4] http://www.igniterealtime.org/projects/smack/ > [5] http://wamp.ws/ > >
