Shaaf's blog

By using the command pattern you are seperating the operation from the invoking object. And just because of that it becomes easier to change the command without chagning the caller/s. This means that you could use Command pattern when you might have the following situation You want to parameterize objects to perform an action You want to specify, execute and queue requests at different times. Just to quickly start you need a command object, An interface will keep it easy going in this case, thus providing you with the option of extending other classes e.

Typically when implementing an interface you would have to implement all the methods that exist in that interface. A very good example is the MouseListener in the java Swing. When you need to implement more then one method where as typically you might be catching only one of them. Saying that you would also find a Mouse Adapter provided as well. Some of us use that often. And that is part of the Adapter pattern.

Sometimes you require to do things silently, without any questions asked and “Just Do It” attitude is required. I often find my self with this problem. If you want to delete or create a Websphere profile from your command line try the following. (I have tried on RSA only) # deleteing a profile wasprofile -delete -profileName MyProfile You should get the following message on deletion INSTCONFSUCCESS: Success: The profile no longer exists.

Factories have been a key pattern in building applications, its fascinatingly simple, effective and to the point. When starting to learn a design oriented approach to applications or API, I would always recommend a factory pattern as one of the key starting notes of highlight in your design. So today I am talking about the Abstract Factory pattern. Its not an “abstract” class or object that you call a pattern. But its a Factory of facotries and that is what exactly makes it so much wordingly abstract.

Following are some of the frequently used svn commands during merging and branching. I used to work with tortoise for this but as soon as I learned these, it feels like a more easier space to be in. Although no points taken away from tortoise, it still works pretty good for the gui part, This article is more targeted towards dark screen lovers. Create a new branch from trunk: If you want to create a branch from a specific revision of Trunk following command is handy.