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

By Ramnivas Laddad

A software program procedure is the conclusion of a collection of matters. one of many relevant premises of object-oriented programming is that every crisis will be carried out as a separate module. even though, there are particular system-wide matters, resembling logging, safeguard, functionality, and so on, that regularly must be addressed in lots of, if now not the entire modules. as a result, the code to deal with those system-wide matters will be jumbled in with the center good judgment of a tremendous variety of modules, leading to reduce productiveness, bad caliber, and structures which are tough to adapt. Aspect-oriented programming overcomes those difficulties by way of modularizing the system-wide issues.

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For example, poor traceability contributes to lower productivity and poor quality: ■ ■ Poor traceability—Simultaneous implementation of several concerns obscures the mapping of the concern to its implementation. This causes difficulty in tracing requirements to their implementation, and vice versa. For example, you would have to potentially examine all modules to trace the implementation of an authentication concern. Lower productivity—Simultaneous implementation of multiple concerns also shifts the focus from the main concern to the peripheral concerns.

Perhaps, trying to view it optimistically, we have traded a cultural and visual diversity for a more varied personal life. Or a more varied and interesting intellectual and technical life. We at Manning celebrate the inventiveness, the initiative, and the fun of the computer business with book covers based on the rich diversity of regional life of two centuries ago‚ brought back to life by the pictures from this collection. info Part 1 Understanding AOP and AspectJ P art 1 of this book introduces aspect-oriented programming (AOP) and the AspectJ language.

For now, don’t worry about the way in which AOP achieves this. 6. Modularizing crosscutting concerns is so important that there are several techniques to achieve it. 6 Implementation of a logging concern using AOP techniques: The logging aspect defines the interception points needing logging and invokes the logging API upon the execution of those points. The client modules no longer contain any logging-related code. crosscutting concerns, such as security, administration, performance, and container-managed persistence.

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