Spring Framework

Spring FRAMEWORK

Visit the Spring Ecosystem and have a look around.

Spring handles the infrastructure, so you can focus on Your Application.

Spring Framework is a Java platform that provides comprehensive infrastructure support for Developing Java Applications.

What does Spring framework provide?

• Application context and dependency injection
• Data access
• Spring MVC

graph TD
   Z((Spring FRAMEWORK))
   A(Application context and dependency injection)
   B(Data access)
   C(Spring MVC)
   
   A --- Z
   Z --- B
   Z --- C

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Application context and dependency injection

Dependency Injection

declare each dependencie a class needs and spring will make sure the have they instances they require.

1. Handling interrelated dependencies among objects.
2. A wrapper -> application context
3. Spring manages object instances

• objects hold data
• instances of classes have methods or functions
• all classes that share the same service should contact the same instance
• share object instances “the singelotn pattern”. The life cycle of an instance.
• spring manages the instances and manages them
• spring connects them together

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Data access

database connectivity

Most common for Java Developers. spring comes with connectivity, querying, transaction management and more.

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Spring MVC

web applications

Build web applications easy

• dynamic web page applications
• REST APIs

{
	name: SpringFramework
	level: Over 9000
	String:"But What does it do? Find out below."
}

Spring Framework

Framework for providing comprehensive infrastructural support for developing Java Applications OOP (Object Oriented Programming) Best practices built in DRY (Don’t Repeat Yourself) Principles

graph TD
   Z((Spring FRAMEWORK))
   A(infrastructural support for developing Java Applications)
   B(OOP Best practices built in)
   C(DRY Principles)
   
   A --- Z
   Z --- B
   Z --- C

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Definitions

• POJO - Plain old Java Object
• Java Beans - Simple objects with only getters and setters
• Spring Beans - POJOs configured in the application context

• DTO (Data Transfer Object) - Bean used to move state between layers

Inversion of Control (IOC)

• IOC provides mechanism of dependency injection
• Application Context wraps the Bean Factory which serves the beans at the runtime of the application
• Spring Boot provides auto-configuration of the Application Context

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