Ramnivas Laddad's AspectJ in Action: Practical Aspect-Oriented Programming PDF

By Ramnivas Laddad

ISBN-10: 1930110936

ISBN-13: 9781930110939

A software program procedure is the conclusion of a suite of matters. one of many critical premises of object-oriented programming is that every challenge could be carried out as a separate module. besides the fact that, there are particular system-wide matters, similar to logging, defense, functionality, etc, that frequently must be addressed in lots of, if now not the entire modules. for that reason, the code to deal with those system-wide issues might be jumbled together with the middle good judgment of a massive variety of modules, leading to reduce productiveness, terrible caliber, and platforms which are not easy to adapt. Aspect-oriented programming overcomes those difficulties via modularizing the system-wide matters.

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Extra info for AspectJ in Action: Practical Aspect-Oriented Programming

Sample text

Throughout this book, you will see many examples of the architect’s dilemma and how (and why) AOP is the best available method of addressing it. One point needs to be made explicitly clear: AOP is not an antidote for bad or insufficient design. In fact, it is very tough to implement crosscutting concerns in a poorly designed core system. You will still need to create a solid core architecture using traditional design methodologies, such as OOP. What AOP offers is not a completely new design process, but an additional means that allows the architect to address future potential requirements without breaking the core system architecture, and to spend less time on crosscutting concerns during the initial design phase, since they can be woven into the system as they are required without compromising the original design.

Such a mismatch results in an awkward mapping of the concerns to the implementation. Since the implementation space is one-dimensional, its main focus is usually the implementation of the core concern, and the implementation of the crosscutting concerns is mixed in with it. While we may naturally separate the individual requirements into mutually independent concerns during the design phase, current programming methodologies do not allow us to retain the separation in the implementation phase. 4 Mapping the N-dimensional concern space using a one-dimensional language.

The weaving added by AOP, however, removes this level of control from the class. In this sense, AOP offers considerable power, and it can work wonders if you utilize the power correctly. AOP will replace OOP: False. Core concerns will continue to be implemented in OOP (or even procedural programming). AOP simply adds a few additional concepts to OOP, just as OOP adds to procedural programming. However, AOP will change the way we use OOP and procedural languages for implementing crosscutting concerns.

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AspectJ in Action: Practical Aspect-Oriented Programming by Ramnivas Laddad

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Categories: Object Oriented Design