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Introduction to Dependency Injection using Spring.NET Ryan Montgomery

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So why Spring.NET? <ul><li>We use more than IoC. </li></ul><ul><li>Well documented. </li></ul><ul><li>Large community. </li></ul><ul><li>A proven framework. </li></ul><ul><li>Supported. </li></ul>

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

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

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What is Dependency Injection? <ul><li>“ 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.” </li></ul><ul><ul><li>Jenkov Aps </li></ul></ul>

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DAO Refactor 0

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DAO Refactor 0

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DAO Refactor 1

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DAO Refactor 2

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Biz Component

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Biz Component

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

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

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

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

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Parking Lot