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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

Timers

So far, we’ve dealt exclusively with client-initiated requests. While this may handle the bulk of an application’s requirements, it doesn’t account for scheduled jobs:

  • A ticket purchasing system must release unclaimed tickets after some timeout of inactivity.

  • An auction house must end auctions on time.

  • A cellular provider should close and mail statements each month.

The EJB Timer Service may be leveraged to trigger these events and has been enhanced in the 3.1 specification with a natural-language expression syntax.

We play with timers in Chapter 19.

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Publisher Resources

ISBN: 9781449399139Errata Page