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
Copyright
About Packt
Contributors
Preface
Index

Active object pattern


The active object type of concurrency design pattern differentiates/distinguishes the method execution from the method invocation. The job of this pattern is the enhancement of concurrency along with simplification in the synchronized access to objects that reside in separate and distinguishable threads of control. It is used for dealing with the multiple client requests that arrive all at once, and also for improving the quality of the service. Let's see the following diagrams, which illustrates the active object design pattern in the concurrency and multithread-based application:

As you can see in the preceding diagram, the following components of this concurrency design pattern:

  • Proxy: This is the active object that is visible to the client. The proxy advertises its interface.
  • Servant: There is a method that is defined in the interface of the proxy. The servant is the provider of its implementation.
  • Activation list: This is a serialized list that contains method request...