Hello everyone!
I've following problem. The project I'm working in has two main
functionalities: first is gathering data, and the second is data
processing.
First one is implemented as EJB. There are mainly only simple CRUD
operations.
The data processing is triggered by the user. Because of time
consuming, I'm planning to apply JMS messages in order to communicate
between the EJB and processing mechanism. The problem is I don't know
how to implement process executor. Because of great amount of data and
need of using complex aggregate functions, I don't want use EJB. I
considered standard JDBC API, but I don't know how it impacts on EJB
transactions. I also haven't got any ideas what should consume JMS
messages. Since process execution could take several hours, I don't
want put it into MDB, rather MDB should trigger separate thread. Do
you know any patterns, which can by used in my situation?

Thanks for your advice,
MP