Using Java and Apache ActiveMQ to implement two types of Java Message Service (JMS) clients - Computer Science
CSci 364
Spring, 2021
Programming Assignment #3
Due: Thursday, February 25, 2021
Design and implement a distributed computing application using Java Message Service (JMS)
(aka Jakarta Messaging) and serialized objects. This will require implementing a two types of
JMS clients—one that reads work data (the manager) and another JMS client (the worker) that
performs the work tasks.
Apache ActiveMQ v5 will be the JMS provider. The provider will host two message queues: a
data queue for sending from the manager to the worker and a work queue for sending from the
worker to the manager.
The manager
The manager JMS client reads a text input file. For each row of data the manager sends the
row to the data queue as a javax.jms.TextMessage object. After the worker processes the data,
the manager receives the work results from the work queue as a javax.jms.ObjectMessage
object.The manager then prints the original input data (the row) and the results.
The worker
The worker JMS client will receive JMS TextMessage objects containing a String of data (a row)
from the data queue in ActiveMQ. Your client shall process the data using one of three Worker
(see the api package on Blackboard) subclass objects described below. Specifically, the client
shall run the Worker.doWork() method. After the doWork method has completed, the client shall
send a JMS ObjectMessage to the work queue in ActiveMQ. The ObjectMessage object will
contain the instance of the Worker subclass with the computed result.
Messages sent to either JMS queue will be non-transacted and acknowledged automatically
(Session.AUTO_ACKNOWLEDGE).
Items on each line in the input file are separated by spaces. The format of each line is as
follows.
id value1 [value2 [value3]]
The line starts with an id field, an integer that represents the work task id. The line has from
one to three additional values. If the line has value1, the work task is to check if the value is
prime. If the line has two values, value1 and value2 are numerator and denominator of a
fraction, respectively. The task is to determine if the fraction can be reduced. Finally, if the line
has three values, the client must sort the String values.
Each work tasks extend api.Worker abstract class and must implement the doWork() and
getWorkResults() methods.
PrimeChecker
See Blackboard for an example.
FractionReducer
Given a numerator and denomenator, calculate the greatest common factor. Divide the input
fields by the greatest common factor. Your class should have two accessor methods to retrieve
the reduced numerator and reduced denominator.
Given input numerator of 12 and input denominator of 9, the reduced numerator should be 4
and the reduced denominator should be 3.
https://www.mathsisfun.com/greatest-common-factor.html
ValueSorter
Sort a series of three values into ascending order.
A partial working example of the manager and worker is available on Blackboard (Assignm
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