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

Defining pointcuts

As mentioned before, pointcuts are used to define a point where advice would be applied. So pointcut is one of the most important elements of an aspect in the application. Let's understand how to define pointcuts. In Spring AOP, we can use expression language to define the pointcuts. Spring AOP uses AspectJ's pointcut expression language for selecting where to apply advice. Spring AOP supports a subset of the pointcut designators available in AspectJ because as you know, Spring AOP is proxy-based and some designators do not support proxy-based AOP. Let's see following table has Spring AOP supported designators.

Spring supported AspectJ designators



It matches the join points by method executions, it is primary pointcut designator supported by Spring AOP.


It matches the join points by limit within certain types.


It limits matching to join points where the bean reference is an instance of the given type.


It limits matching to join points where...