Book Image

Building Microservices with Spring

By : Dinesh Rajput, Rajesh R V
Book Image

Building Microservices with Spring

By: Dinesh Rajput, Rajesh R V

Overview of this book

Getting Started with Spring Microservices begins with an overview of the Spring Framework 5.0, its design patterns, and its guidelines that enable you to implement responsive microservices at scale. You will learn how to use GoF patterns in application design. You will understand the dependency injection pattern, which is the main principle behind the decoupling process of the Spring Framework and makes it easier to manage your code. Then, you will learn how to use proxy patterns in aspect-oriented programming and remoting. Moving on, you will understand the JDBC template patterns and their use in abstracting database access. After understanding the basics, you will move on to more advanced topics, such as reactive streams and concurrency. Written to the latest specifications of Spring that focuses on Reactive Programming, the Learning Path teaches you how to build modern, internet-scale Java applications in no time. Next, you will understand how Spring Boot is used to deploying serverless autonomous services by removing the need to have a heavyweight application server. You’ll also explore ways to deploy your microservices to Docker and managing them with Mesos. By the end of this Learning Path, you will have the clarity and confidence for implementing microservices using Spring Framework. This Learning Path includes content from the following Packt products: • Spring 5 Microservices by Rajesh R V • Spring 5 Design Patterns by Dinesh Rajput
Table of Contents (22 chapters)
Title Page
About Packt

Declarative Annotation-based caching

In Spring applications, Spring's abstraction provides the following Annotations for caching declaration:

  • @Cacheable: This indicates that before execution of the actual method, look at the return value of that method in the cache. If the value is available, return this cached value, if the value is not available, then invoke the actual method, and put the returned value into the cache.
  • @CachePut: This updates the cache without checking if the value is available or not. It always invokes the actual method.
  • @CacheEvict: This is responsible for triggering cache eviction.
  • @Caching: This is used for grouping multiple annotations to be applied on a method at once.
  • @CacheConfig: This indicates to Spring to share some common cache-related settings at the class level.

Let us now take a closer look at each annotation.

The @Cacheable annotation

@Cacheable marks a method for caching. Its result is stored in a cache. For all subsequent invocations of that method with the same...