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Apache Camel Developer's Cookbook

You're reading from   Apache Camel Developer's Cookbook For Apache Camel developers, this is the book you'll always want to have handy. It's stuffed full of great recipes that are designed for quick practical application. Expands your Apache Camel abilities immediately.

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Product type Paperback
Published in Dec 2013
Publisher Packt
ISBN-13 9781782170303
Length 424 pages
Edition 1st Edition
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Toc

Table of Contents (14) Chapters Close

Preface 1. Structuring Routes 2. Message Routing FREE CHAPTER 3. Routing to Your Code 4. Transformation 5. Splitting and Aggregating 6. Parallel Processing 7. Error Handling and Compensation 8. Transactions and Idempotency 9. Testing 10. Monitoring and Debugging 11. Security 12. Web Services Index

Transactional file consumption


The consumption of files is not something that immediately comes to mind when talking about transactions. Camel provides you with a way to do just this, through the use of the File Component.

This recipe will show you how to perform file consumption, and explain how Camel does its best to guarantee an all-or-nothing process, isolated from other threads and optionally processes, that leaves the consumed file in a state consistent with the overall operation.

Getting ready

The Java code for this recipe is located in the org.camelcookbook.transactions.fileconsumption package. The Spring XML files are located under src/main/resources/META-INF/spring and prefixed with fileConsumption.

How to do it...

The File Component in Camel is part of the camel-core library. To consume files from a specific directory, define a file: endpoint URI within a consumer endpoint, that is within a from statement as per the following pattern:

file:///path/to/source

When a file is successfully...

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