Practical Inversion Of Control Matt Hinze

Agenda What is this talk about The what and why of IOC How to do it Usage scenarios

What is this talk about

The what and why of IOC

How to do it

Usage scenarios

?

?

EmailSender

WorkflowStepper

new

Relationship is set at compile time.

new isn’t always viable.

Inversion of Control A concept Relinquishing the responsibility of managing dependencies. Dependency Injection A pattern Constructor injection Property injection

Inversion of Control

A concept

Relinquishing the responsibility of managing dependencies.

Dependency Injection

A pattern

Constructor injection

Property injection

There is no new

Some Benefits Enumerated Testing Reuse Simplicity Construction velocity Fun

Testing

Reuse

Simplicity

Construction velocity

Fun

Don’t use the tool where you don’t need it, in most tests for example. Think of the tool as a “composer” instead of a “container”; minimize entry points. Prefer constructor injection. Try to avoid “contextual binding”; avoid magic strings; favor convention over configuration.

Don’t use the tool where you don’t need it, in most tests for example.

Think of the tool as a “composer” instead of a “container”; minimize entry points.

Prefer constructor injection.

Try to avoid “contextual binding”; avoid magic strings; favor convention over configuration.

Useful Resources StructureMap documentation Autofac documentation Martin Fowler Jeremy Miller Tool-specific mailing lists

StructureMap documentation

Autofac documentation

Martin Fowler

Jeremy Miller

Tool-specific mailing lists

For More I teach a course in which we do this stuff for three days. We build features in a real system using agile principles and the tools that enable them. For more information: http://www.headspringsystems.com/training/

I teach a course in which we do this stuff for three days.

We build features in a real system using agile principles and the tools that enable them.

For more information: http://www.headspringsystems.com/training/