Book Image

Learning Spring 5.0

By : Tejaswini Mandar Jog
Book Image

Learning Spring 5.0

By: Tejaswini Mandar Jog

Overview of this book

<p>Spring is the most widely used framework for Java programming and with its latest update to 5.0, the framework is undergoing massive changes. Built to work with both Java 8 and Java 9, Spring 5.0 promises to simplify the way developers write code, while still being able to create robust, enterprise applications.</p> <p>If you want to learn how to get around the Spring framework and use it to build your own amazing applications, then this book is for you.</p> <p>Beginning with an introduction to Spring and setting up the environment, the book will teach you in detail about the Bean life cycle and help you discover the power of wiring for dependency injection. Gradually, you will learn the core elements of Aspect-Oriented Programming and how to work with Spring MVC and then understand how to link to the database and persist data configuring ORM, using Hibernate.</p> <p>You will then learn how to secure and test your applications using the Spring-test and Spring-Security modules. At the end, you will enhance your development skills by getting to grips with the integration of RESTful APIs, building microservices, and doing reactive programming using Spring, as well as messaging with WebSocket and STOMP.</p>

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Table of Contents (18 chapters)
Title Page
Title Page
Credits
Credits
About the Author
About the Author
About the Reviewer
About the Reviewer
www.PacktPub.com
www.PacktPub.com
Customer Feedback
Customer Feedback
Preface
Preface
Free Chapter
1
Spring at Glance
Spring at Glance
Introduction to the Spring Framework
Problems addressed by Spring
Spring architecture
What more Spring supports underneath?
Spring road map
Container - the heart of Spring
How are beans made available from container?
2
Dependency Injection
Dependency Injection
The life of a bean
Using JSR-250 annotations for the bean life cycle
Instance creation
Dependency injection
Summary
3
Accelerate with Spring DAO
Accelerate with Spring DAO
Handling databases
Handling exceptions
Object relation mapping
Summary
4
Aspect-Oriented Programming
Aspect-Oriented Programming
Core and cross-cutting concerns
Summary
5
Be Consistent - Transaction Management
Be Consistent - Transaction Management
Understanding transactions
Life cycle of transaction management
Summary
6
Exploring Spring MVC
Exploring Spring MVC
Features for faster development
The Spring MVC
A deep dive into Spring MVC
Summary
7
Be Assured, Take a Test Drive
Be Assured, Take a Test Drive
Testing - an important step
Testing tools
Phase 1 - Unit testing DAO Unit testing by JUnit
Mock testing
Phase 2 - Integration testing
Phase 3 - System testing
8
Make It Safe - Security Management
Make It Safe - Security Management
Importance of security in an application
The Spring Security framework
New features added in Spring Security 5.0
Core components of Spring Security
Spring Security mechanism
Configuring security in Spring via namespace
Configuring AuthenticationManager
Logout
Managing the Session
9
Explore the Power of RESTful Web Services
Explore the Power of RESTful Web Services
Web services
Summary
10
Exchange Information - Use Messaging
Exchange Information - Use Messaging
Spring and messaging
Overview of the WebSocket API
SockJS
STOMP
Summary
11
Be Active - Reactive Programming
Be Active - Reactive Programming
Introduction to Reactive Streams
Reactive Stream implementations
Reactive types
Understanding stream
Spring WebMVC and Spring web reactive programming
WebClient
Summary

Spring Security mechanism

Spring Security is a very lengthy and complex process for us to put down every piece of it. We will discuss the process to get an overview of the factors to be considered while defining Spring Security in our application:

  • The entry point to start security starts from deployment descriptor, where the DelegatingFilterProxy filter has been mapped. It just delegates the requests to the Spring Security framework where all functionalities needed to perform security will be handled by filters that were defined in the application context.
  • Now the Spring application context searches for the bean configured with the name springSecurityFilterChain. It's actually an alias name for the bean that has been configured for the FilterChainProxy class, with its name as filterChainProxy. So, whenever the check is done, the filterChainProxy bean will be returned by the context once found. This bean consists of the information about the list of security filters that were defined in the...
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