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Messaging between apps

Posted on 2006-07-06
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HI, i am planning to include a messaging feature in my app. So that the different users on the network using the app can send messages to each other. The messages are not instant messages, they are to be act like email which can be sent to user even when they are not on the network but the app need to alert the user when there's a new message.

I am thinking of using MSMQ for this but can i create all queues on a machine?
say...when user logs in machine A and creates a public queue on Machine B which will always be on so the queues will be accessible at any time.

Instead of checking for new messages in the background in a loop, are there any better ways to get notified when there's a new message in the queue?
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Question by:jaxrpc
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Tertioptus earned 500 total points
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scenario:
machine A is logged in
machine B is logged off

machine A (already knows of machine B) stores a message for machine A locally in a mailbox named (machine B)

machine B logs in
machine B broadcasts it's arrival
machine A checks to see if machine B has anything in it's mailbox
   if yes, machine A sends all messages to machine B
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Summary:
I think their has to be a queue somewhere.  In what I think you are trying to accomplish (which is a nice design by the way), the best way is for every client app to also be somewhat of a self managed postal service.  Much like IM in that you must maintain a directory of other users/IPs, such that you can switch from real to virtual conversation seamlessly.  And for each record in that directory, there should be a mailbox.

If this is supposed to be an entirely P2P system, then the client's broadcast should try and send a small notification to everyone in it's directory.

Machine A should not empty it's mailbox for Machine B until Machine B confirms that it recieved each of the messages.

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