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Oracle Service Bus 11g Development Cookbook

You're reading from   Oracle Service Bus 11g Development Cookbook

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Product type Paperback
Published in Jan 2012
Publisher Packt
ISBN-13 9781849684446
Length 522 pages
Edition 1st Edition
Languages
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Toc

Table of Contents (19) Chapters Close

Oracle Service Bus 11g Development Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
1. Creating a basic OSB service 2. Working Efficiently with OSB Artifacts in Eclipse OEPE FREE CHAPTER 3. Messaging with JMS Transport 4. Using EJB and JEJB transport 5. Using HTTP Transport 6. Using File and Email Transports 7. Communicating with the Database 8. Communicating with SOA Suite 9. Communication, Flow Control, and Message Processing 10. Reliable Communication with the OSB 11. Handling Message-level Security Requirements 12. Handling Transport-level Security Requirements Index

Introduction


The consequence of not thinking about reliable communication or not implementing it in our OSB services can lead to many problems in case of error. It can lead to the loss of your messages, a destination can receive multiple messages and this means that the sending application can't trust the service bus. The application needs to monitor its own requests.

Reliable communication is all about Distributed Transactions—XA, Quality of Service (QoS), and persistence.

XA is a transaction that can be shared across multiple resources such as a JMS queue, coherence, direct binding, JCA binding, or an EJB session bean. Be aware that the HTTP transport does not support XA and can't take part in the so called global transaction. When an OSB transport or a JCA adapter starts a transaction, this transaction will be handled or controlled by the Java Transaction API (JTA) of the WebLogic server. XA will use a two-phase commit so all resources either do a commit or a rollback together.

When a destination...

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