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

Appending records to a file


This simple recipe shows how a file can be built in within different sub jobs by appending data to an existing file. The append method is one way of building complex files, as will be demonstrated in later recipes in this chapter.

Getting ready

Open the jo_cook_ch08_0010_fileAppend job.

How to do it...

The steps for appending records to a file are as follows:

  1. Copy the complete subjob1 – copy me sub job and paste it to create a second sub job.

  2. Link the two sub jobs using an onSubjobOK link.

  3. Open tFixedFlowInput, and change Records from first subjob to Records from second subjob.

  4. Open tFileOutputDelimited on the new sub job, and tick Append, as shown in the following screenshot:

How it works...

The first sub job creates the file, and the second sub job appends to the same file.

There's more…

While relatively trivial, this recipe demonstrates a very powerful method for creating files that do not adhere to the norm, such as files containing a mixture of fixed and delimited data...