This document provides an overview of the Spring framework. It discusses that Spring is an open source framework created by Rod Johnson that uses dependency injection and aspect-oriented programming. It also covers Spring architecture, features of Spring 4.0 like enhanced event listener support, and core Spring concepts like dependency injection, inversion of control, and bean definitions which define objects for Spring to manage.

1. Spring
in
PracticeVersion 4.0
[ Overview | Design | Architecture | DI & IoC ]
By: SAURABH SHARMA | TechShareZone Community
Source: http://javazone.techsharezone.com | +91 810 591 1711
Session: 1

2.  Created by Rod Jhonson
 An open source framework
 Spring is an light weight Dependency Injection and Aspect
Oriented Container and framework.
- Spring Overview

3. - Spring framework architecture

4. - Deprecated Methods and Packages
- Java 8 Support
- Groovy Bean Definition DSL
- Spring Core Changes
- Spring Web Module Features
Currently Spring 4.2 is the latest version and they have
enhanced event listener, hibernate, jetty and modern Java
component design with spring framework.
- Spring 4.0 Release and Features

5.  Dependency Injection
 Also known as IoC (Inversion of Control)
 Aspect Oriented Programming
 Runtime injection-based
 Portable Service Abstractions
 The rest of spring
 ORM, DAO, Web MVC, Web, etc.
 Allows access to these without knowing how they actually
work
- What does Spring offer?

6. Dependency Injection (DI) is a design pattern that removes the dependency
from the programming code so that it can be easy to manage and test the
application.
Constructor-based dependency injection
Constructor-based DI is accomplished when the container invokes a class constructor
with a number of arguments, each representing a dependency on other class.
Setter-based dependency injection
Setter-based DI is accomplished by the container calling setter methods on your
beans after invoking a no-argument constructor or no-argument static factory
method to instantiate your bean.
- Dependency Injection in Spring

7. - IoC is all about Object dependencies.
- Traditional "Pull" approach:
- Direct instantiation
- Looking up a service via JNDI
"Push" approach:
- Something outside of the Object "pushes" its
dependencies into it.
The Object has no knowledge of how it gets its dependencies, it
just assumes they are there.
- The "Push" approach is called "Dependency Injection".
- What is Inversion of Control (IoC)?

8.  Typical java bean with a unique id
 Beans are normally created by Spring as late as possible
- What is a bean?
Scope Description
Singleton Single instance spring IoC
Prototype Single bean definition to have any number of object instance
Request A bean definition to an HTTP request. Only valid in the context of a web
aware spring applicationContext.
Session A bean definition to an HTTP session. Only valid in the context of a web
aware spring applicationContext.
Global-session A bean definition to an global HTTP session. Only valid in the context of a
web aware spring applicationContext.

9.  Defines a bean for Spring to manage
 Key attributes
 class (required): fully qualified java class name
 id: the unique identifier for this bean
 configuration: (singleton, init-method, etc.)
 constructor-arg: arguments to pass to the constructor at creation
time
 property: arguments to pass to the bean setters at creation time
 Collaborators: other beans needed in this bean (a.k.a
dependencies), specified in property or constructor-arg
 Typically defined in an XML file
- What is a bean definition?

10. <?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd">
<bean id="expense" class="com.tsz.springfactory.model.Expense" scope="singleton“
init-method=“init” destroy-method=“destroy”>
</bean>
</beans>
- Sample bean definition

11. Thank You
“This recepie may not be tasty but it was full of
ingredients of knowledge”