Book Image

Talend Open Studio Cookbook

By : Rick Barton
Book Image

Talend Open Studio Cookbook

By: Rick Barton

Overview of this book

Data integration is a key component of an organization's technical strategy, yet historically the tools have been very expensive. Talend Open Studio is the world's leading open source data integration product and has played a huge part in making open source data integration a popular choice for businesses worldwide.This book is a welcome addition to the small but growing library of Talend Open Studio resources. From working with schemas to creating and validating test data, to scheduling your Talend code, you will get acquainted with the various Talend database handling techniques. Each recipe is designed to provide the key learning point in a short, simple and effective manner.This comprehensive guide provides practical exercises that cover all areas of the Talend development lifecycle including development, testing, debugging and deployment. The book delivers design patterns, hints, tips, and advice in a series of short and focused exercises that can be approached as a reference for more seasoned developers or as a series of useful learning tutorials for the beginner.The book covers the basics in terms of schema usage and mappings, along with dedicated sections that will allow you to get more from tMap, files, databases and XML. Geared towards the whole lifecycle, the Talend Open Studio Cookbook shows readers great ways to handle everyday tasks, and provides an insight into all areas of a development cycle including coding, testing, and debugging of code to provide start-to-finish coverage of the product.
Table of Contents (21 chapters)
Talend Open Studio Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Common Type Conversions
Index

Dumping the console output to a file from within a job


This recipe shows how you can dump all logging data to a file, while still running the job in the Studio. It is particularly useful when debugging large data sets.

Getting ready

Open the jo_cook_ch10_0090_consoleToFile job.

How to do it...

The steps for dumping console output to a file from within a job are as follows:

  1. Run the job and view the console output.

  2. Add the following code to tJava_1:

    // redirect the console output to a file from within studio
    System.setOut(new java.io.PrintStream(new java.io.BufferedOutputStream(new java.io.FileOutputStream(context.cookbookData+"outputData/chapter10/chapter10_jo_0090_consoleOut.txt"))));
  3. Run the job. You will see only the job's start and end messages.

  4. Open the file in the cookbook data directory under output/chapter10 named chapter10_jo_0090_consoleOut.txt. You will see that the logging information has been copied to the file, as shown in the following screenshot:

How it works...

When the java statement...