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Does server need threads?

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Assignment - "You must create a data server that will accept multiple concurrent network connections and allow them to interrogate and manipulate the database. Because multiple concurrent connections may exist, you must make both your server and the suncertify.db classes threadsafe. You may implement your threaded server in more than one class if you choose."
However, if you choose RMI it appears RMI will handle the concurrency - the client simply calls the Data methods through an object which: a.) implements the remote interface required by RMI, and b.) includes all public methods of Data. So, if you use RMI, do you even need to worry about creating and managing threads?
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My interpretation is that if you use RMI, indeed all these
issues are handled for you, which I consider to be an advantage
of using RMI.
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