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You're reading from Learning Pentaho Data Integration 8 CE An end-to-end guide to exploring, transforming, and integrating your data across multiple sources

Product type Paperback

Published in Dec 2017

Publisher Packt

ISBN-13 9781788292436

Length 500 pages

Edition 3rd Edition

Languages

Java

Tools

Pentaho

Concepts

Data Processing

Author (1):

María Carina Roldán

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Table of Contents (17) Chapters

Preface

1. Getting Started with Pentaho Data Integration

2. Getting Started with Transformations FREE CHAPTER

3. Creating Basic Task Flows

4. Reading and Writing Files

5. Manipulating PDI Data and Metadata

6. Controlling the Flow of Data

7. Cleansing, Validating, and Fixing Data

8. Manipulating Data by Coding

9. Transforming the Dataset

10. Performing Basic Operations with Databases

11. Loading Data Marts with PDI

12. Creating Portable and Reusable Transformations

13. Implementing Metadata Injection

14. Creating Advanced Jobs

15. Launching Transformations and Jobs from the Command Line

16. Best Practices for Designing and Deploying a PDI Project

Doing simple tasks with the Java Class step

Just as the JavaScript step, the User Defined Java Class step is also meant to insert code into your transformations but in this case, it's Java code. Whether you need to implement a functionality not provided in built-in steps or want to reuse some external Java code, or to access Java libraries, or to increase performance, this step is what you need. In this section, you will learn how to use it.

Using the Java language in PDI

Java—originally developed at Sun Microsystems, which then merged into Oracle Corporation—is one of the most popular programming languages in use, particularly for client-server web applications. In particular, PDI and the whole Pentaho platform have been developed using Java as the core language.

It was to be expected that eventually, a step would appear that allows you to code Java inside PDI. This step is User Defined Java Class, which we will call UDJC or Java Class step for short. The goal of this step is to allow you...