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MsgConnect capabilities

Posted: 09/24/2007 09:23:38
by Ming Wah Tham (Basic support level)
Joined: 09/24/2007
Posts: 1


My company is answering to a tender which requires messaging capabilities on QNX.
If found suitable, we would deploy MsgConnect in our solution.

I've run through briefly the forum and the online documentation, I still have some unanswered doubts. Hope you could help clarify asap.

May I ask:
1. Can MsgConnect handle sending to multiple targets at once?
2. Can I use MsgConnect to implement something like publish/subscribe kind of message queue? The publisher just need to "publish" 1 copy of the message, and any subscribers who subscribes to this message will get the message.
3. Let's say when we send a message to a recipient, if the recipient is not available, does the queue store the message for the recipient until the recipient connects?
4. Regarding the way to use MsgConnect, is it better to have a queue per recipient, or a queue per kind of message? 1 message can potentially have many recipients (up to a hundred?)

Thanks for a speedy reply!

MingWah THAM.
Posted: 09/24/2007 09:55:43
by Eugene Mayevski (Team)

1. Each message can have only one receipient. You can send multiple messages to different recipients and they will be sent in parallel when you use SocketTransport or HttpTransport. Other transports (MMF, UDP) are sequential.
2. Publish/subscribe architecture must be built separately. Delphi (Pascal) code package includes a sample.
3. No, message persistence is not implemented and it doesn't look like it can be implemented by the user.
4. MCQueue object is logical and is usedonly to "sort" messages by calling the right handler. The backend incoming message list is one per MCMessenger object.

Sincerely yours
Eugene Mayevski



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