What is Aspect-Oriented Software Development?
Aspect-Oriented Software Development (AOSD), sometimes just called Aspect-Oriented Programming (AOP), is a new approach to software design that addresses modularity problems that are not handled well by other approaches, including Structured Programming and Object-Oriented Programming (OOP). AOSD complements, but doesn’t replace those approaches. Typical enterprise and internet applications today have to address “concerns” like security, transactional behavior, logging, etc.. The subsystems that provide these services can be implemented in a modular way. However, to use these services, you must insert the same “boilerplate” code fragments into various places in the rest of the application to invoke these services. This violates the “don’t repeat yourself” (DRY) principle and it compromises the overall system modularity, because the same invocation code is scattered throughout the application. For example, if you want to control access to certain services in your application, you could
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