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POC# - Design questions about a server firing push notifications to clients - how to implement?
 

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    <p>This is the scenario.</p> <p>I have multiple clients on our application, and one server. The server is itself disconnected from the clients, it just downloads some data from the web via a windows service (web services and FTP), processes the data and updates a database to which all the clients are connected and draw data from.</p> <p>I would like to be able to actively notify the clients, and with a certain degree of granularity, when some downloading occurs (i.e. only the Traders when a price/trade update occurs, or only the Engineers when there's something for them) without polling.</p> <p>The server should fire up a notification to all the connected clients instead of having them continuously "ask" if there is an update, because in this case I would have to maintain state on all the clients.</p> <p>I thought about XMPP, with Matrix.</p> <p>To do so each client has to open a persistent connection with the windows service, but I lack the exact details on how to implement this. MAybe with nodes! For what I understand XMPP is perfect for what I want to accomplish and gives me the extensibility to grow to some more functionality if I have the need to.</p> <p>I don't know if to implement my own server or use one of the existing one (I hear jabberd2 has an excellent windows server).</p> <p>But most important: I need suggestions on A) an XMPP server to run on Windows and B) a C# library. Besides Matrix I have found very few, and above all I need notifications support (pubsub).</p>
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    1. COHave you looked at MQs? Examples: NServiceBus, RabbitMQ, ActiveMQ. All of those support pubsub and has .net clients
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    2. COAre there any reasons why you cant/dont want to use IIS server? In .NET you can use remoting and create listeners on your clients to be notified of any changes on your server....
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    3. CO@pebrian I didnt know these existed, I'll take a look. @Eduard I try to stick as much as I can to open source - but thanks, I'll take that into account.
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