Basic HTML version of Foils prepared July 5 98

Foil 42 JDCE MessageQueue

From FMS: Forces Modeling and Simulation Handout JSU HPC Summer Institute for Undergraduates, Jackson MS -- June 15 1998. by Wojtek Furmanski, Subhash Nair, Tom Pulikal


The jdceMessageQueue is implemented as a Linked List for faster operations of addition/removal of messages.
The message queue provides for reporting availability of data on the queuebesides providing for returning the queue Contents as a stream of bytes or an array of Strings.
The queue has a in-lined class the QueueEnumerator which provides an Enumeration of the QueueContents.
The queueWidget has pointers to the preceeding Element and the elements successor.
class QueueWidget {
Object object;
QueueWidget prev;
QueueWidget next;
QueueWidget(Object object,
QueueWidget queueWidget1, QueueWidget queueWidget2) {
this.object = object;
prev = queueWidget1;
next = queueWidget2;
}
}
Besides the operations mentioned above, the queue provides for handling priority messages expressed by the addItemToTop() method.



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