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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

Consuming messages from a topic with non-durable/durable subscription


Subscribing to and consuming messages from a JMS topic is similar to consuming messages from a JMS queue. The main difference between a topic and a queue is that the topic can have multiple subscribers and that a subscription can either be durable or non-durable. With a durable topic, a message that cannot be delivered due to the subscriber being unavailable will be kept by the JMS server and delivered later when the subscriber is back online.

In this recipe, we will show you how to implement a proxy service as a subscriber for the topic. The proxy service will act as a listener on the JMS topic and will get active as soon as a message arrives in the topic. First we implement the non-durable subscription and show the durable subscription in the There's more... section later.

Getting ready

For this recipe, we need the JMS topic SourceTopic from the OSB Cookbook standard environment.

How to do it...

Let's implement the proxy...

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