Various topics from software architecture part 4: the unit of work continued

Introduction

In the previous post we looked at the basic goals and the abstractions associated with the unit of work pattern. We came to the conclusion that it might not be necessary to introduce an abstraction for the unit of work to begin with as modern ORMs like EntityFramework already have a well-tested unit of work object inside. There may still be cases though where you can make use of the pattern and the associated unit of work repository.

In this post we’ll see some possible mock implementations of these abstractions and how they can be wired up in the repository layer.

Implementation stubs

We’ll briefly look at some implementation skeletons for the IUnitOfWork and IUnitOfWorkRepository interfaces and how they can be used in a concrete repository.

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Various topics from software architecture part 3: the unit of work

Introduction

In the previous post we looked at a basic implementation of the Repository pattern. We said that this pattern is often used in large layered projects where persistence ignorance of the domain layer is a requirement. It is also very useful in unit testing where you want to avoid calling a real data store and instead create mocks or stubs for the repository.

In this post we’ll look at another concept that comes up in conjunction with data access: the unit of work. We’ll also refer back to the previous post on the Repository pattern here and there as the Unit of Work pattern is often used in conjunction with repositories.

This post will be more concerned with abstractions. The next post will continue with some implementation stubs.

Some of the explanations are taken directly from the series on domain driven design so they might look familiar if you’ve seen that.

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