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A software system is the realization of a set of concerns. One of the central premises of object-oriented programming is that each concern should be implemented as a separate module. However, there are certain system-wide concerns, such as logging, security, performance, and so forth, that often need to be addressed in many, if not all of the modules. Consequently, the code to handle these system-wide concerns may be mixed in with the core logic of a huge number of modules, resulting in lower productivity, poor quality, and systems that are hard to evolve.
Aspect-oriented programming overcomes these problems by modularizing the system-wide concerns.
AspectJ enables AOP programming in Java by adding a few new language constructs. By using Java as the base language and creating a final system that is compatible with Java byte code specification, AspectJ passes on all the benefits of Java. The use of Java as the base language also makes AspectJ a relatively easy language to learn.
AspectJ in Action is a practical guide to AOP and AspectJ. The reusable code examples that are provided will enable quick implementation of functionality in your system.
The book is divided into three parts. The first part introduces AOP and AspectJ and will be helpful to developers wanting to learn or advance their knowledge of AspectJ. The second and third parts present examples of everyday situations in which you can use simple and easy AspectJ solutions to implement common system requirements such as logging, policy enforcement, resource pooling, business rules, thread-safety, authentication and authorization, as well as transaction management.
Ramnivas Laddad is a Sun Certified Architect of Java Technology. He has worked with object-oriented systems for many years and with aspect-oriented programming for the past three years. He is the author of several articles and papers and co-author of Professional Java XML. His article series on AOP and AspectJ was published in "JavaWorld." He lives in Sunnyvale, California.
Speaks directly to me as a developer.
... real solutions to tough problems ...
I started reading in 11 pm and couldn't stop ... It's a must read for anyone interested in the future of programming.
... The only resource that presents AOP concepts and real-world examples in an approachable, readable way.
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