35. Classes used by the Order Queue application

• Order class:

  • Constructor creates an Order object with a unique order number

  • toString() method returns a string in the form "Order #n" where n is the order number

• OrderQueue -- a thread-safe method-synchronized class

  • pushOrder( Order ) method adds order to the queue

  • Order pullOrder() method retrieves the first available order from the queue

• OrderTaker -- a worker thread class

  • Constructor OrderTaker( int orderCount, OrderQueue queue ) takes specified number of orders to be added to the queue

  • run() adds orders to the queue and displays info about each order added. The thread sleeps for one second between the orders.

• OrderHandler -- a worker thread class

  • Constructor OrderHandler( OrderQueue queue ) creates the order handler and takes reference to the queue

  • run() retrieves orders from the queue and displayes info for each order retrieved. The thread sleeps for two seconds between the orders.