Introduction to Dependency Injection using Spring.NET Ryan Montgomery

So why Spring.NET? We use more than IoC. Well documented. Large community. A proven framework. Supported.

We use more than IoC.

Well documented.

Large community.

A proven framework.

Supported.

Spring.Core IoC is the heart of spring. Additional Features Expression Language Validation Framework Data binding Framework Dynamic Reflection Threading Resource abstraction

IoC is the heart of spring.

Additional Features

Expression Language

Validation Framework

Data binding Framework

Dynamic Reflection

Threading

Resource abstraction

What is Inversion of Control? Hollywood Principle. “ Don't call us, we'll call you.” Dependency Injection Service Locator

Hollywood Principle.

“ Don't call us, we'll call you.”

Dependency Injection

Service Locator

What is Dependency Injection? “ Dependency injection is a style of object configuration in which an objects fields and collaborators are set by an external entity. In other words objects are configured by an external entity . Dependency injection is an alternative to having the object configure itself.” Jenkov Aps

“ Dependency injection is a style of object configuration in which an objects fields and collaborators are set by an external entity. In other words objects are configured by an external entity . Dependency injection is an alternative to having the object configure itself.”

Jenkov Aps

DAO Refactor 0

DAO Refactor 0

DAO Refactor 1

DAO Refactor 2

Biz Component

Biz Component

Spring IoC Container Responsible for the Instantiation and Injection of dependencies based on configuration. The IObjectFactory is the actual representation of the Spring IoC container. The most commonly used IObjectFactory implementation is the XmlObjectFactory class.

Responsible for the Instantiation and Injection of dependencies based on configuration.

The IObjectFactory is the actual representation of the Spring IoC container.

The most commonly used IObjectFactory implementation is the XmlObjectFactory class.

Demo This demonstration is based on the Movie Finder example in Spring.NET.

Contact Information Ryan Montgomery Blog http://rmontgomery429.blogspot.com Email [email_address] Rapidparts Inc. Site http://www.rpionline.com Blog http://blogs.rpionline.com

Ryan Montgomery

Blog

http://rmontgomery429.blogspot.com

Email

[email_address]

Rapidparts Inc.

Site

http://www.rpionline.com

Blog

http://blogs.rpionline.com

References Spring.NET Framework Chapter 5. The IoC container http://www.springframework.net/doc-latest/reference/html/objects.html Martin Fowler Inversion of Control Containers and the Dependency Injection pattern http://martinfowler.com/articles/injection.html Jenkov What is Dependency Injection http://tutorials.jenkov.com/dependency-injection/index.html

Spring.NET Framework

Chapter 5. The IoC container

http://www.springframework.net/doc-latest/reference/html/objects.html

Martin Fowler

Inversion of Control Containers and the Dependency Injection pattern

http://martinfowler.com/articles/injection.html

Jenkov

What is Dependency Injection

http://tutorials.jenkov.com/dependency-injection/index.html

Parking Lot