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

Performing one-off pieces of logic using tJava


The tJava component allows one-off logic to be added to a job. Common uses of tJava include setting global or context variables prior to the main data processing stages and printing logging messages.

Getting ready

Open the job jo_cook_ch05_0000_tJava.

How to do it…

  1. Open the tJava component.

  2. Type in the following code:

    System.out.println("Executing job "+jobName+" at "+TalendDate.getDate("CCYY-MM-dd HH:mm:ss"));
  3. Run the job. You will see that message is printed showing the job name and the date and time of execution.

How it works…

If you examine the code, you will see that the Java code is simply added to the generated code as is. This is why you must remember to add ; to the end of the line to avoid compilation errors.

See also

  • Setting context variables and globalMap variables using tJava, in this chapter.