http://www.ftponline.com/special/ops...default_pf.asp


How does AOP let you change an application's behavior without editing source code? The short answer is that the AOP implementations combine aspects and existing code to add new behavior to an application. They include a software component that weaves aspects and application code into an executable that embodies the behaviors defined in the aspects. Either a compiler or classloader can perform this weaver function. Different implementations interlace aspects and application code in different ways,...

AOP is a programming technique that modularizes concerns (areas of interest or requirements) that cut across a system and are common to many modules. These modules, called aspects, associate pointcuts and advices. Pointcuts identify joinpoints, which are well-defined points in the flow of execution such as a method call or data variable access. Advices, which are associated with specific pointcuts, specify the code to execute at a joinpoint. Put another way, a pointcut declares an event and an advice declares an action to be performed when an event fires