Book Image

Hands-On Design Patterns with Java

By : Dr. Edward Lavieri
2 (1)
Book Image

Hands-On Design Patterns with Java

2 (1)
By: Dr. Edward Lavieri

Overview of this book

Java design patterns are reusable and proven solutions to software design problems. This book covers over 60 battle-tested design patterns used by developers to create functional, reusable, and flexible software. Hands-On Design Patterns with Java starts with an introduction to the Unified Modeling Language (UML), and delves into class and object diagrams with the help of detailed examples. You'll study concepts and approaches to object-oriented programming (OOP) and OOP design patterns to build robust applications. As you advance, you'll explore the categories of GOF design patterns, such as behavioral, creational, and structural, that help you improve code readability and enable large-scale reuse of software. You’ll also discover how to work effectively with microservices and serverless architectures by using cloud design patterns, each of which is thoroughly explained and accompanied by real-world programming solutions. By the end of the book, you’ll be able to speed up your software development process using the right design patterns, and you’ll be comfortable working on scalable and maintainable projects of any size.
Table of Contents (15 chapters)
Free Chapter
Section 1: Introducing Design Patterns
Section 2: Original Design Patterns
Section 3: New Design Patterns

Understanding the extract-transform-load pattern

The extract-transform-load architectural pattern, as the name suggests, has the following three stages:

  1. Extract data from external sources
  2. Transform the extracted data as needed
  3. Load the newly transformed data into a repository specific to the current system

The most common uses of the extract-transform-load pattern is in business intelligence, data warehousing, knowledge management systems, and customer relationship management systems.

We will look at the extract, transform, and load steps as they apply to the similarly-named architectural pattern in the next sections. We will use the example of a sales tool that mines various sources of customer leads, transforms that data into a common form, and then loads the data into a central database.