Devnology Community Day

Software Anti-Patterns (uit de praktijk) André Boonzaaijer – aboonzaaijer@sogyo.nl

Agenda ,[object Object],[object Object],[object Object],SOFTWARE INNOVATORS

Wie ben ik? ,[object Object],[object Object],[object Object],[object Object],[object Object],SOFTWARE INNOVATORS

[object Object],SOFTWARE INNOVATORS

Context SOFTWARE INNOVATORS Software leverancier Software gebruiker

Software levenscyclus SOFTWARE INNOVATORS Lifecycle Revolutie Evolutie 10% 10 jaar Platform, Taal, Design Patterns, Proces, Tools 90%

Software leveranciers: tijdlijn SOFTWARE INNOVATORS DOS 1990 2000 2010 Win32 Managed / Web

The ‘Sogyo’ of software systems SOFTWARE INNOVATORS Delphi, C++, C, VB, Smalltalk, DSDM, RUP, Waterfall, RAD, JBF, (T/PL) SQL, Client/server, PHP Java SE / Java EE, C# / ASP.NET, SCRUM, XP, Issue tracking, Source control, Continuous Integration, AJAX / Comet, MDD, DDD, Architecture, O/R bridging, SOA, EDA, Requirements modeling

10-year RAD-Race SOFTWARE INNOVATORS DOS 1990 2000 2010 Win32 Managed / Web

10-year RAD-Race User Interface ‘ Monoliet’ Database

10-year RAD-Race Presentation Layer Data Layer User Interface ‘ Monoliet’ Database

10-year RAD-Race Presentation Layer Data Layer Business logic

10-year RAD-Race: Conclusion? Presentation Layer Data Layer Business logic

Token-ring development ,[object Object],[object Object],[object Object],[object Object],[object Object]

Framework mania ,[object Object],SOFTWARE INNOVATORS Source UI Fw Data Fw Logging Fw ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],Over-Generic Development “ Generic “ Code SOFTWARE INNOVATORS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Specific code

Let’s make it ourselves ,[object Object],[object Object],[object Object],[object Object],SOFTWARE INNOVATORS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Let’s make it ourselves SOFTWARE INNOVATORS

Ever-lasting service interface ,[object Object],SOFTWARE INNOVATORS public class SuperGenericNeverBreakingService : System.Web.Services.WebService { [WebMethod] public string ProcessMessage(string xmlMessage) { return DoSomeMagicWithLotsOfDatabasesAndStuff(); } }

3NF business modeling SOFTWARE INNOVATORS ,[object Object],[object Object],[object Object],[object Object],[object Object]

Who Built the Pyramids? ,[object Object],[object Object],[object Object],[object Object],SOFTWARE INNOVATORS

Inverse domain language ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],SOFTWARE INNOVATORS

DDD – the technologist’s way ,[object Object],SOFTWARE INNOVATORS Persistency, Repositories, value objects, (re)hydration, identity, O/R mapping, Persistency Ignorance, decoupling, inversion of control, dependency injection, .... NEE! DDD gaat over: Begrijpen van (ergo: modelleren van) de business van je klant. PUNT.

Conclusies ,[object Object],[object Object],[object Object],SOFTWARE INNOVATORS

Contact ,[object Object],[object Object],[object Object],[object Object],[object Object],SOFTWARE INNOVATORS

The ASP.Net Trap ,[object Object],[object Object],[object Object],SOFTWARE INNOVATORS

Devnology Community Day

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