DI, dependency-injection, is a design pattern where dependencies (instances of objects, properties) of a component are set through the constructor(s), methods or fields (properties)

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2answers
540 views

“Don't cross the streams” Database access objects independant of the Data tier in an N-Tier architecture?

I'm adding functionality to our website which performs long-running processes asynchronously using MSMQ. Doing this ansynch, however means we need to notify users when their requests are completed. ...
5
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4answers
666 views

How could dependency injection be integrated into the language? [closed]

I've been thinking a bit on how dependency injection could be better integrated directly into a C# like language. I've come up with a potential solution I'd like to hear your opinion on. I haven't ...
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2answers
7k views

Why would I choose Unity over Autofac [closed]

I'm looking to start a new application and I want to use Dependency Injection. I have a lot of "Microsoft is the only way to go guys" in our shop so of course Unity is the way they wanted to go. ...
14
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6answers
722 views

Do abstractions have to reduce code readability?

A good developer I work with told me recently about some difficulty he had in implementing a feature in some code we had inherited; he said the problem was that the code was difficult to follow. From ...
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3answers
3k views

Sell me on IoC containers, please

I've seen several recommend use of IoC containers in code. The motivation is simple. Take the following dependency injected code: class UnitUnderTest { std::auto_ptr<Dependency> d_; public: ...
8
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2answers
625 views

How do I inject test objects when the real objects are created dynamically?

I want to make a class testable using dependency injection. But the class creates multiple objects at runtime, and passes different values to their constructor. Here's a simplified example: public ...
10
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4answers
927 views

Gradual approaches to dependency injection

I'm working on making my classes unit-testable, using dependency injection. But some of these classes have a lot of clients, and I'm not ready to refactor all of them to start passing in the ...
357
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13answers
113k views

So Singletons are bad, then what?

There has been a lot of discussion lately about the problems with using (and overusing) Singletons. I've been one of those people earlier in my career too. I can see what the problem is now, and yet, ...
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3answers
483 views

Recommendations on integrating DI/IoC container into an existing application

I am now faced with integrating an inversion of control (IoC) container into an existing application, and I'm looking for some recommendations on how that can most easily be accomplished with the ...
98
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4answers
46k views

Difference between Dependency Injection (DI) and Inversion of Control (IOC)

I've been seeing a lot of references of Dependency Injection (DI) & Inversion Of Control (IOC), but I don't really know if there is a difference between them or not. I would like to start using ...