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The Spring landscape

Spring covers a wide variety of technological aspects handled by applications of different types, ranging from a simple standalone Java application up to the most complex, mission critical distributed enterprise systems you can imagine. Unlike most other open source or proprietary frameworks that focus on a specific technology concern such as Web, Messaging, or Remoting, Spring successfully covers almost all the technical aspects of business applications. In most cases, instead of reinventing solutions, Spring utilizes and integrates proven existing frameworks to achieve this end-to-end coverage. Spring is highly modular; hence, it noninvasively allows you to cherry-pick just the modules or features you require in order to become a one-stop shop for all your development needs on JVM.

The whole Spring Framework portfolio is organized into three major elements:

  • Spring Framework
  • Spring Tool Suite
  • Spring subprojects

Spring is constantly improving and becoming more and more modular with every new version so that you can use just the required modules.

Note

This book is based on Spring version 4.

The Spring Framework modules

The core Spring Framework provides basic infrastructure for Java development on top of its core Inversion of Control (IoC) container. The IoC container is an infrastructure that provides Dependency Injection (DI) for applications. Both the concepts of Dependency Injection and IoC containers are explained in detail later in this chapter. The core Spring Framework is pided into the following modules, providing a range of services:

Spring Tool Suite (STS)

STS is an Eclipse-based IDE (short for Integrated Development Environment) for Spring development. You can download the pre-bundled STS from http://spring.io/tools/sts/all or update your existing Eclipse installation from the update site found at the same location. STS provides various high-productivity features for Spring development. In fact, a Java developer can use any IDE of their choice. Almost all the Java IDEs support Spring development, and most of them have got plugins available for Spring.

Spring subprojects

Spring has many subprojects that solve various application infrastructure needs. From configuration to security, web apps to big data, productivity to enterprise application integration (EAI), whatever your technical pain point be, you will find a Spring project to help you in your application development. Spring projects are located at http://spring.io/projects.

Some notable projects you may find useful right away are Spring Data (JPA, Mongo, Redis, and so on), Spring Security, Spring Web Services, Spring Integration, Spring for Android, and Spring Boot.

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