Mastering EJB 4ed

Офигенный код в книге Mastering EJB 4ed!
Chapter 15, конец метода execute:

if (out != null) {
     return true;
} else {
     return false;
}

класс! :))
А еще в этой книге есть строки в раздели Best Practice:
Many organizations have tried—and failed—to truly reuse components. Because of this, it is a perfectly valid strategy to not attempt true reuse at all. Rather, you can shoot for a copy-and-paste reuse strategy, which means to make the source code for components available in a registry to other team members or other teams. They can take your components’ code and change it as necessary to fit their business problem. While this may not be true reuse, it still offers some benefits.

Эта запись писалась в течении 7 минут 37 секунд.