Tim McCarthy Tim McCarthy McCarthy Information Systems - PowerPoint PPT Presentation

May 21, 2023 •649 likes •779 views

Tim McCarthy Tim McCarthy McCarthy Information Systems tmccart1@san.rr.com Agenda Pros/Cons of application frameworks Refactoring to DDD patterns getting rid of the persistence/plumbing code from the Domain Model My own DDD

Tim McCarthy Tim McCarthy McCarthy Information Systems tmccart1@san.rr.com
Agenda � Pros/Cons of application frameworks � Refactoring to DDD patterns – getting rid of the persistence/plumbing code from the Domain Model � My own DDD rules for dealing with Repositories and � My own DDD rules for dealing with Repositories and Unit of Work � Show lots of code!!!
Pros & Cons of Frameworks � Pros � You can get a lot for free � Can save you a lot of time � Usually pretty well tested � Usually pretty well tested � Cons � Can allow developers to easily fall into traps � Sometimes mixes up the logic with the plumbing � Can be very difficult to maintain and reuse logic
Taking a look at building ASP.NET web applications with wizards / Introducing a SharePoint-based application for sending legal notices
Refactoring to DDD Patterns � Writing good tests to validate the requirements � Building a Domain Model � Refactoring infrastructure/plumbing code out of the Domain Model Domain Model
Looking at the progress of the legal notice application code over the versions…
My Rules for Repositories � All Repositories must implement some type of Repository interface, i.e. ICustodianRepository � All Repositories are created via a Factory which uses Configuration and Reflection Configuration and Reflection � Domain Model classes can use Repositories, but they can only be coupled to their interface, NOT their implementation!
Unit of Work and Repositories � The Unit of Work does not actually talk to the data source! � Repositories and Unit Of Work instances talk via interfaces and double-dispatch interfaces and double-dispatch � Repositories can work with or without a Unit of Work, and vice-versa
Looking at how the code of the legal notice application is now organized using DDD principles
Resources � [Evans]: Domain-Driven Design: Tackling Complexity in the Heart of Software, Evans, Addison-Wesley (2003) � [Fowler]: Patterns of Enterprise Application � [Fowler]: Patterns of Enterprise Application Architecture, Fowler, Addison-Wesley (2003) � [Nilsson]: Applying Domain Driven Design and Patterns: using .NET, Addison Wesley 2006
Contact Info � Code: www.codeplex.com/ncipna � My Email: tmccart1@san.rr.com

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