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

Using tJava to display status messages and variables


tJava is a very useful component for logging purposes, because it can be used in its own sub job. This enables tJava to be used to print job status information at given points in the process. The following recipe demonstrates this.

Getting ready

Open the jo_cook_ch10_0070_loggingWithtJava job.

How to do it...

The steps for using tJava to display status messages and variables are as follows:

  1. Open tJava_1 and add the following code:

    System.out.println("\n\nSearching directory "+context.cookbookData+"chapter10 for files matching wildcard *jo*\n\n");
  2. Open tJava_2 and add the following code:

    System.out.println("Processing file: "+((String)globalMap.get("tFileList_1_CURRENT_FILE")));
  3. Open tJava_3 and add the following code:

    System.out.println("\n\nCompleted......"+((Integer)globalMap.get("tFileList_1_NB_FILE"))+" files found\n\n");    

How it works...

tJava_1 and tJava_3 simply print out process status information (starting process and process end). tJava_2...