Book Image

Mastering Ninject for Dependency Injection

By : Daniel Baharestani
Book Image

Mastering Ninject for Dependency Injection

By: Daniel Baharestani

Overview of this book

Dependency injection is an approach to creating loosely coupled applications. Maintainability, testability, and extensibility are just a few advantages of loose coupling. Ninject is a software library which automates almost everything that we need in order to implement a dependency injection pattern. Mastering Ninject for Dependency Injection will teach you everything you need to know in order to implement dependency injection using Ninject in a real-life project. Not only does it teach you about Ninject core framework features that are essential for implementing dependency injection, but it also explores the power of Ninject's most useful extensions and demonstrates how to apply them. Mastering Ninject for Dependency Injection starts by introducing you to dependency injection and what it's meant for with the help of sufficient examples. Eventually, you'll learn how to integrate Ninject into your practical project and how to use its basic features. Also, you will go through scenarios wherein advanced features of Ninject, such as Multi-binding, Contextual binding, providers, factories and so on, come into play. As you progress, Mastering Ninject for Dependency Injection will show you how to create a multilayer application that demonstrates the use of Ninject on different application types such as MVC, WPF, WCF, and so on. Finally, you will learn the benefits of using the powerful extensions of Ninject.
Table of Contents (12 chapters)

Interception


There are cases where we need to do some operations before or after calling a single method or a number of methods. For example, we may need to log something before and after invoking all the methods in a component. Interception allows us to wrap the injecting dependency in a proxy object which can perform such operations before, after, around or instead of each method invocation. This proxy object can then be injected instead of the wrapped service. Ninject Interception extension creates such proxy wrappers on the fly, and allows us to intercept invocations of the wrapped service members. The following diagram shows how a service will be replaced with an intercepted one during the interception process.

Interception is one of the best practices for implementing Cross Cutting Concerns such as logging, caching, exception handling, or transaction processing.

Setup Interception

Ninject Interception extension generates proxy instances based on the DynamicProxy implemented by LinFu or...