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 caching design pattern

The concept of caching is to temporarily store data that makes accessing it faster. Caching is employed to help save on the use of resources. When we retrieve data, it should be made available for future requests for the same data. Implementing this saves on the processing time required for continual retrieval of the same data.

The next diagram provides a conceptual view of how caching is architected into a system. As you can see, there are several caches and a cache-management system that controls what is in a cache and how it is accessed. The diagram illustrates how redundancy can also be built into a caching system:

Conceptual view of caching

There is no single method of implementing caching in Java. In the next section, we will review one possible approach for implementing this design pattern.