The morning after the RIA Hacker Night in TechEd Vienna, fellow Enterprise Geek Craig Cmehil and myself had the opportunity to sit down and discuss the highlights of the Hacker Night, TechEd in General, and the future of both events. We also spend a little time looking back at some of the less know activities of TechEds past (digging up some stories that were perhaps best left unmentioned).
The infamous community shirt from TechEd Boston 2005
TechEd is quickly approaching and I thought I would use this episode of the ABAP Freak Show to preview some of the Web Dynpro ABAP related sessions that will presented at TechEd. I preview the following sessions in this video:
In the following “SDN Land of the ÜberGeek” episode Craig Cmehil speaks with Adobe about the upcoming RIA Hacker Night at the SAP TechEd 2009 events in Phoenix, Vienna and Bangalore and the brand new edition to the evening event the – “Code Camp”.
This is part 3 of the 5 part series on ABAP OO. In this part we will expand the lessons of the previous tutorial and look at a special type of class in ABAP – the Persistent Object. Persistent Objects are an OO-based approach to the types of data access that you would normally perform with SQL statements. With Persistent Objects you don’t code any SQL statements. Instead a class is generated for you that contains SET and GET methods for reading and updating data. ABAP Persistent Objects also contain the functional for more complex update scenarios – like V2 Asynchronous updates.
This is part 2 of the 5 part series on ABAP OO. In this part we will expand the lesson by looking at static vs. instance, visibility, exception classes, inheritance, polymorphism and abstract classes. We start with a very basic class with only static methods that works very much like a Function Group/Function Modules. Next we change the methods into instance methods and see how a class instance allows us to model complex data structures and relationships in code. Then we see how exception classes can make our exceptions more meaningful and simplify the surrounding code for dealing with exceptions. Finally we see the real power of object oriented design come to life as we use inheritance and polymorphism to hide the inner complexity of our business logic from calling applications all while ensuring uniform execution of our code. These techniques may feel foreign at first, but in the long run they lead to code that is easier and safer to maintain.
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