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

Creating custom functions using code routines


Code routines enable the developer to create re-usable Java classes that can be integrated into Talend jobs, and in particular within tMap.

In the validation chapter, there is an example of a simple code routine. This recipe is a fuller explanation of creating and using code routines within Talend.

Getting ready

Open the job jo_cook_ch05_0040_codeRoutine.

How to do it…

  1. In the metadata section, open the Code folder and right-click on Routines. Select Create routine.

  2. Name the routine regexUtilities and click on Finish. This will open a Java package and create a new class called regexUtilities, and a test method called helloExample.

  3. Copy the following code immediately after the end of the helloExample method.

        /**
         * regexData: return the first instance of regex pattern in a string.  
         * Returns null if there is no text matching the pattern.
         * e.g. regexData(".*r", "world") # returns "wor"
         * 
         * {talendTypes} String
         * 
       ...