Talend Open Studio Cookbook
eBook - ePub

Talend Open Studio Cookbook

Rick Barton

  1. 270 pages
  2. English
  3. ePUB (mobile friendly)
  4. Available on iOS & Android
eBook - ePub

Talend Open Studio Cookbook

Rick Barton

Book details
Book preview
Table of contents
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About This Book

In Detail

Data integration is a key component of an organizations technical strategy, yet historically the tools have been very expensive. Talend Open Studio is the worlds 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.

Approach

Primarily designed as a reference book, simple and effective exercises based upon genuine real-world tasks enable the developer to reduce the time to deliver the results. Presentation of the activities in a recipe format will enable the readers to grasp even the complex concepts with consummate ease.

Who this book is for

Talend Open Studio Cookbook is principally aimed at relative beginners and intermediate Talend Developers who have used the product to perform some simple integration tasks, possibly via a training course or beginner's tutorials.

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Talend Open Studio Cookbook


Table of Contents

Talend Open Studio Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Support files, eBooks, discount offers and more
Why Subscribe?
Free Access for Packt account holders
Preface
What this book covers
What you need for this book
Who this book is for
Conventions
Reader feedback
Customer support
Downloading the example code
Errata
Piracy
Questions
1. Introduction and General Principles
Before you begin
Installing the software
How to do it…
Enabling tHashInput and tHashOutput
How to do it…
2. Metadata and Schemas
Introduction
Schema metadata
Schemas
Repository schemas
Generic schemas
Shared schemas
Generated data sources
Fixed schemas and columns
Hand-cranking a built-in schema
Getting ready
How to do it…
How it works…
There’s more...
Date patterns
Nullable elements
Propagating schema changes
Getting ready
How to do it…
How it works…
There’s more…
Creating a generic schema from the existing metadata
How to do it…
How it works…
Cutting and pasting schema information
Getting ready
How to do it…
How it works…
There’s more…
Dropping schemas to empty components
Getting ready
How to do it…
How it works…
There’s more…
Creating schemas from lists
Getting ready
How to do it...
How it works…
There’s more…
3. Validating Data
Introduction
Enabling and disabling reject flows
Getting ready
How to do it…
How it works…
There's more...
See also
Gathering all rejects prior to killing a job
Getting ready
How to do it…
How it works…
There's more...
See also
Validating against the schema
Getting ready
How to do it…
How it works…
Rejecting rows using tMap
Getting ready
How to do it…
How it works…
There's more…
Checking a column against a list of allowed values
Getting ready
How to do it…
How it works…
There's more…
See also
Checking a column against a lookup
Getting ready
How to do it…
How it works…
Creating validation rules for more complex requirements
Getting ready
How to do it…
How it works…
There's more…
See also
Creating binary error codes to store multiple test results
Getting ready
How to do it…
How it works…
There's more…
Decrypting the error code
4. Mapping Data
Introduction
The tMap component
Single line of code
Batch versus real time
Simple mapping and tMap time savers
Getting ready
How to do it...
How it works...
There's more…
Creating tMap expressions
Getting ready
How to do it...
How it works...
There's more…
Testing expressions
Expression editor
Getting around the 'one line' limitation
See Also
Using the ternary operator for conditional logic
Getting ready
How to do it...
Single ternary expression: if-then-else
Ternary in ternary: if-then-elsif-then-else
How it works…
There's more…
Using intermediate variables in tMap
Getting ready
How to do it…
How it works…
There's more…
Filtering input rows
Getting ready
How to do it...
How it works…
There's more…
Splitting an input row into multiple outputs based on input conditions
Getting ready
How to do it...
How it works…
There's more…
Joining data using tMap
Getting ready
How to do it...
How it works…
There's more…
See Also
Hierarchical joins using tMap
Getting ready
How to do it...
How it works…
Using reload at each row to process real-time / near real-time data
Getting ready
How to do it...
How it works…
Loading the data into memory
The globalMap key
The WHERE clause
The result
There's more…
5. Using Java in Talend
Introduction
Performing one-off pieces of logic using tJava
Getting ready
How to do it…
How it works…
See also
Setting the context and globalMap variables using tJava
Getting ready
How to do it…
How it works…
There's more…
See also
Adding complex logic into a flow using tJavaRow
Getting ready
How to do it…
How it works…
Creating pseudo compo...

Table of contents