Treffer: Re-engineering of a distributed object infrastructure for heterogeneous enterprise computation of continual queries

"The amount of information available over the Internet continues to increase. However, users simply do not have the time to manually and repeatedly query multiple, heterogeneous web-accessible databases to search for or track all the information that may be of interest. A solution to this problem is a continual query processing system, a software application that automatically, repeatedly performs database queries and notifies the user when results of interest become available.In this thesis the implementation of those re-engineering efforts will be discussed. Additionally, there will be a discussion of how similar changes could benefit not only other continual query processing systems, but also other J2EE applications that require a distributed object infrastructure"--Abstract, page iii.