Dan Stieglitz

Aspect-Oriented Programming (AOP) is a new, thought-provoking architecture paradigm still in its youth. One of AOP's primary goals is to improve the development of object-oriented systems by refactoring related lines of code that are typically found spread among classes (and are therefore difficult to maintain). These blocks of related code represent functional "aspects" of the system, which now can be written in a single place and then "woven" into the target application. Logging the start and end of all method calls, securing method calls, and handling thrown exceptions are all commonly found aspects. While AOP provides an interesting and effective methodology for refactoring aspects out of code, how to implement these aspects is still left up to the developer. This article discusses a strategy for building a more easily maintainable, compartmentalized exception ... (more)

SOA Foundation Components: Building an XML Content Router

Many changes lurk around the corner for enterprise architectures, including a wide adoption of Web services, message-based architectures, and eventually service-oriented architectures. Additionally, XML is quickly becoming the dominant wire protocol for transferring data between systems, and even between enterprises. In an effort to begin transitioning to some of these new technologies, many enterprises are introducing services to their existing architectures. XML content routing is one of the most valuable of these early-adoption services for many enterprises wishing to glue the... (more)