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Learning Pentaho Data Integration 8 CE

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

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Product type Paperback
Published in Dec 2017
Publisher Packt
ISBN-13 9781788292436
Length 500 pages
Edition 3rd Edition
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Author (1):
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María Carina Roldán María Carina Roldán
Author Profile Icon María Carina Roldán
María Carina Roldán
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Table of Contents (17) Chapters Close

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 JavaScript step


In the first versions of PDI, coding in JavaScript was the only way users had to perform many tasks. In the latest versions, there are many other ways for these tasks but JavaScript is still an option. There is the JavaScript step that allows you to insert code into a PDI Transformation.

Using the JavaScript language in PDI

JavaScript is a scripting language primarily used in website development. However, inside PDI, you use just the core language—you don't run a web browser and you don't care about HTML. There are many available JavaScript engines. PDI uses the Rhino engine from Mozilla. Rhino is an open source implementation of the core JavaScript language; it doesn't contain objects or methods related to the manipulation of web pages.

Note

If you are interested in getting to know more about Rhino, follow this link:https://developer.mozilla.org/en/Rhino_Overview

The core language is not too different from other languages that you might know. It has...

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