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I am developing a software and the client will only be able to use the system on a certain number of computers at a time. I’d like to know how I get the number of machines that have the system open every time a computer tries to open the system. If the amount of open computers exceeds the limit(Amount of computers varies with the license of use that the customer acquires when purchasing the system), the system will not open.
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Depends on its implementation.
If you are using direct TCP/IP connections, it’s easy: Monitor the collection of connections, and deny new connections if the value reaches the expected maximum.
If you are using non-permanent connections, you will need to implement some kind of active session control.
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I believe that you should store somewhere the amount that is in use (database, text file, or something like that). When the user clicks out, you decrease the amount. Another way would be to implement Heartbeat Pattern as well:
http://www.codeproject.com/Articles/8349/Observing-Applications-via-Heartbeat
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Do you have a central server for clients to communicate to? Or the application and
standalone?– Omni
Has a server.
– user18748