Design Pattern Modularization with AOP

Design patterns – object oriented, concurrency control, and J2EE – all have certain crosscutting elements present. The obvious result of conventional implementation is unclear implementation that is tedious to implement and tough to change. Aspect-oriented programming (AOP) offers a way to simplify implementation of these design patterns. Further, AOP offers new design patterns of its own that allow for new ways of implementing functionalities. This session shows how the use of AOP can simplify implementation of design pattern.

Implementing design patterns using AOP offers multiple benefits. First, like other applications of AOP, it modularizes the implementation of the design patterns. The modularization localizes any changes, such as introducing optimization and switching from one concurrency control scheme to another without system-wide re-implementation. Second, new design patterns can be introduced in systems without invasive changes. Third, use of AOP to implement design patterns results in reusable code components. In effect, AOP transforms the reusable concepts in design patterns into reusable code. Further, use of AOP does not modify the intent and philosophy of the target design patterns, thus preserving the investment in understanding the value and consequences of those design patterns.

In this session, we will discuss how fundamentally AOP transforms the pattern implementation. We will look at examples from all the kinds of design patterns mentioned – object-oriented (GoF), concurrency control, J2EE, as well as aspect-oriented design patterns.

About Ramnivas Laddad

Ramnivas Laddad is a well-known expert in enterprise Java, especially in the area of AOP and Spring. He is a Spring Framework and Cloud Foundry committer. Ramnivas is also the author of AspectJ in Action, the best-selling book on AOP and AspectJ that has been lauded by industry experts for its presentation of practical and innovative AOP applications to solve real-world problems. He has spoken at many leading industry events including JavaOne, JavaPolis, No Fluff Just Stuff, SpringOne, and O'Reilly OSCON. In recent years, Ramnivas has become a Scala fan. Ramnivas lives in the Silicon Valley.

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