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...