This program dispatch and serve recurrent messages.

Program can process from 1 to 100 messages. The ideal number is 10. You have to input the quantity by console. Program initialize a priority queue with employees. That employees can be operators, supervisors o directors. Queue is ordered since minor position to mayor position in the company. I could make a class Employee and subclasses for Operator, Supervisor and Director, but i suppose that for this exercise that would be unnecessary. Program start n threads of Dispatch class (n = quantity of messages).
Dispatch inherits from Thread. I choose that and not Runnable, because Thread class have more methods for control multithreading. Then program call to start method of Dispatch, and this method to run.

• When queue is empty, I put a sleep with a time and retry the process.

• When you input a message quantity great than 10, first 10 threads (messages) have the maximum priority and the rest less priority than them. Threads with less priority have a mark (delayed). Threads with delayed mark execute method yield for wait and put again to ready to execute while others threads end to run.

*** I didn’t use before threads in Java, I have used GPARS with Grails, bug i know class Thread and read the theory in order to make the exercise. I would like discuss the exercise with you. Thanks.

Class Diagram: https://github.com/lorepressiani/DispatchMessages/blob/master/Class%20Diagram.png

Sequence Diagram: https://github.com/lorepressiani/DispatchMessages/blob/master/Sequence%20Diagram.png