Book Image

Learning Pentaho Data Integration 8 CE - Third Edition

Book Image

Learning Pentaho Data Integration 8 CE - Third Edition

Overview of this book

Pentaho Data Integration(PDI) is an intuitive and graphical environment packed with drag-and-drop design and powerful Extract-Tranform-Load (ETL) capabilities. This book shows and explains the new interactive features of Spoon, the revamped look and feel, and the newest features of the tool including transformations and jobs Executors and the invaluable Metadata Injection capability. We begin with the installation of PDI software and then move on to cover all the key PDI concepts. Each of the chapter introduces new features, enabling you to gradually get practicing with the tool. First, you will learn to do all kind of data manipulation and work with simple plain files. Then, the book teaches you how you can work with relational databases inside PDI. Moreover, you will be given a primer on data warehouse concepts and you will learn how to load data in a data warehouse. During the course of this book, you will be familiarized with its intuitive, graphical and drag-and-drop design environment. By the end of this book, you will learn everything you need to know in order to meet your data manipulation requirements. Besides, your will be given best practices and advises for designing and deploying your projects.
Table of Contents (23 chapters)
Title Page
Credits
About the Author
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface

Using command-line arguments


Besides the use of named parameters, there is another way to provide external values to a Transformation: command-line arguments, that is, arguments that you supply in the command line when you run Pan or Kitchen. In this section, you will learn how to implement the use of command-line arguments in Spoon and how to provide the values in Spoon and also when running Pan.

First, let's create a new version of the Hello World Transformation that we created in Chapter 1, Getting Started with Pentaho Data Integration. The purpose of the Transformation is to read your name from the command line and then write it to the log:

  1. Create a new Transformation.
  2. Drag to the work area a Get System Info step, a UDJE step, and a Write to log step. Link the steps in this order.
  3. Double-click on the Get System Info step and use it to add a field called name that will hold the command line argument 1. Use the following screenshot as reference:

Using command line arguments

  1. Click on OK.
  2. Use...