Orthogonal Architecture
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This document discusses orthogonal architecture and pragmatic approaches. It covers principles like separation of concerns, single responsibility, open/closed, and dependency injection. It provides examples of applying these principles through presentation patterns with views, presenters, and tests. It also discusses using a message bus, dependency injection containers, aspect-oriented programming, and resources for further reading.
![The TestpublicclassWhen_patient_name_is_missing : InstanceContextSpecification<EditPatientPresenter>{ protectedoverridevoid Because() { The<IEditPatientView>().PatientName.Text = ""; } [Observation] publicvoidShould_display_error_message() { The<IEditPatientView>().PatientName.ErrorMessage .ShouldNotBeNull(); }}](https://image.slidesharecdn.com/orthogonalarchitecture-090829070710-phpapp01/85/Orthogonal-Architecture-14-320.jpg)
Orthogonal Architecture
- 1. Orthogonal ArchitectureA pragmatic approachSergey ShishkinInterComponentWare AGsergey.shishkin@icw.dehttp://shishkin.org
- 2. This talk is supposed to be focused on...
- 3. This talk is not supposed to discuss in detail...
- 5. Architecture Open Space 2009http://picasaweb.google.com/lcorneliussen/ArchitectureNETOpenSpace2009#5347109274901628498
- 6. The decisions that are hard to change—Martin Fowler, PoEA
- 8. The Last Responsible Moment
- 9. S.O.L.I.D.
- 12. The ViewpublicclassEditPatientView:UserControl, IEditPatientView{ privateEditPatientPresenter presenter; publicEditPatientView() { PatientName = newTextBoxAdapter(patientNameTextBox); } publicIViewElementPatientName { get; set; } privatevoidOnSaveClicked(object sender, EventArgs e) { presenter.SavePatient(); }}
- 13. The PresenterpublicclassEditPatientPresenter : Presenter{ publicvoidSavePatient() { if (Validate(view.PatientName.IsRequired("Name is required"))) { var name = view.PatientName.Text; ... } } ...}
- 14. The TestpublicclassWhen_patient_name_is_missing : InstanceContextSpecification<EditPatientPresenter>{ protectedoverridevoid Because() { The<IEditPatientView>().PatientName.Text = ""; } [Observation] publicvoidShould_display_error_message() { The<IEditPatientView>().PatientName.ErrorMessage .ShouldNotBeNull(); }}
- 16. Constructor InjectionI’m not going to call this constructor in my codepublicclassEditPatientPresenter{ privateIEditPatientView view; privateIMessageBus bus; publicEditPatientPresenter(IEditPatientView view, IMessageBus bus) { this.view = view; this.bus = bus; }}
- 17. Message Bus / Event Broker
- 18. Message BuspublicclassEditPatientPresenter{ ... publicvoidSavePatient() { var command = newEditPatientCommand { Patient = view.Patient }; bus.Send(command); }}
- 19. Service LayerpublicclassPatientHandler : IHandler<EditPatientCommand>{ publicvoid Handle(EditPatientCommand message) { using (vartx = newTransactionScope()) { var patient = repository.Get(message.PatientId);patient.ChangeName(message.PatientName);repository.Save(patient);tx.Complete(); } }}
- 20. Data Access Layer / O/R Mapper
- 21. QueryingpublicstaticclassPatientRepositoryExtensions{ publicstaticICollection<Patient> FindByName( thisIRepository<Patient> repository, stringsearchText) { returnrepository.AllEntities .Where(p => p.Name.Contains(searchText)) .ToList(); }}var collection = repository.FindByName(“Smith”);
- 24. ResourcesSOLIDhttp://butunclebob.com/ArticleS.UncleBob.PrinciplesOfOodPresentation Patterns:http://www.jeremydmiller.com/ppatterns/Clean Code Developerhttp://clean-code-developer.deBooks:Michael Feathers, “Working effectively with legacy code”Robert C. Martin, “Clean code” and “Agile principles, patterns and practices in C#”Martin Fowler, “Patterns of enterprise architecture”