120. The Java Message
Service
Rev. 1.1
This course is now available directly from our partner, Capstone Courseware.
This course teaches everything that most Java developers will need
to know about asynchronous messaging using the Java Message Service, or JMS.
Both the point-to-point and publish-and-subscribe messaging styles are covered,
but there is an emphasis on the more popular point-to-point approach using
message queues. The course moves quickly from JMS fundamentals -- connections,
sessions, queues, topics, etc. -- to intermediate techniques such as message
properties and selectors. By the end of the day, students will understand JMS
reliability and be able to make intelligent architectural choices between
delivery modes, acknowledgement modes, and transacted sessions.
LEARNING OBJECTIVES
·
Use JMS queues to manage message transmission
between a single producer and a single consumer.
·
Use JMS topics to allow for broadcasting of
messages in real time.
·
Use various JMS message types, including text,
object, and map-based messages.
·
Set message headers and use properties to define
additional information about messages.
·
Use message selectors to filter messages in
consumption.
·
Trigger redelivery of messages using various
acknowledgement modes and techniques.
·
Use JMS transactions to assure that message
receipts and sends are grouped into atomic units of execution.
Course Duration: 1 day.
Prerequisites:
·
Solid Java programming experience is required --
consider Course 103 or its equivalent a firm prerequisite.
·
An understanding of Java web applications will
be helpful, but is not required.
1.
Fundamentals
Asynchronous Messaging
The Java Message Service
Point-to-Point Messaging
Publish-and-Subscribe Messaging
JNDI
Connections and Sessions
Working with Queues
Working with Topics
Expiration
2.
Message Content
Message Types
Header Fields
Properties
Message Selectors
3.
Reliability
Message Persistence
JMS from Web Applications
The Component Environment
Acknowledgement and Redelivery
Acknowledgement Modes
Session Recovery
Transactions
What JMS Transactions Are and Aren't
Transaction Pitfalls
Batch Processing
Priority
JMS and EJB: Message-Driven Beans
JMS and Web Services: SOAP Messaging
Appendix A. Learning
Resources
System Requirements
Hardware – minimal: 500 MHz, 256 meg RAM, 500 meg disk space
Hardware – recommended: 1.5 GHz, 512 meg RAM, 1 gig disk
space.
Operating system: Tested on Windows XP Professional.
Course software should be viable on all systems which support the J2EE 1.4
reference implementation.
Software: All
free downloadable tools.