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Enterprise JavaBeans 3.1, 6th Edition
book

Enterprise JavaBeans 3.1, 6th Edition

by Andrew Lee Rubinger, Bill Burke
September 2010
Intermediate to advanced content levelIntermediate to advanced
766 pages
18h 35m
English
O'Reilly Media, Inc.
Content preview from Enterprise JavaBeans 3.1, 6th Edition

Appendix J. Timer Service: Credit Card Processor Example

Description

As we’ve seen with message-driven beans, a client request is not the only way to start a business taskflow. In addition to listening on incoming messages like MDB, events can be fired based on some timed criteria. EJB handles this via the Timer Service.

EJB 3.1 has seen significant advancements to the bean provider’s view of the Timer Service with a completely revamped natural-language syntax. This example models a credit card processing operation, which at the beginning of every hour will process all queued transactions. Scheduling the job is done both programmatically via the javax.ejb.TimerService API, as well as declaratively via the @Timeout and @Schedule annotations.

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Publisher Resources

ISBN: 9781449399139Errata Page