Aspectj in Action: Enterprise AOP with Spring Applications by Ramnivas Laddad

By Ramnivas Laddad

To let the construction of actually modular software program, OOP has developed into aspect-oriented programming. AspectJ is a mature AOP implementation for Java, now built-in with Spring.

AspectJ in motion, moment Edition is an absolutely up-to-date, significant revision of Ramnivas Laddad's best-selling first variation. it is a hands-on consultant for Java builders. After introducing the middle rules of AOP, it indicates you ways to create reusable ideas utilizing AspectJ 6 and Spring three. you will grasp key gains together with annotation-based syntax, load-time weaver, annotation-based crosscutting, and Spring-AspectJ integration. construction on normal applied sciences resembling JDBC, Hibernate, JPA, Spring defense, Spring MVC, and Swing, you will observe AOP to universal difficulties encountered in company applications.

This booklet calls for no past adventure in AOP and AspectJ, however it assumes you are accustomed to OOP, Java, and the fundamentals of Spring.

''Clear, concisely worded, well-organized ... a excitement to read.''

-From the Foreword through Rod Johnson, writer of the Spring Framework

''This e-book teaches you the way to imagine in elements. it's crucial examining for either newbies who recognize not anything approximately AOP and specialists who imagine they are aware of it all.''

-Andrew Eisenberg, AspectJ improvement instruments venture Committer

''Ramnivas showcases the way to get the easiest out of AspectJ and Spring.''

-Andy Clement, AspectJ undertaking Lead

''One of the simplest Java books in years.''

-Andrew Rhine, software program Engineer, eSecLending

''By a ways the simplest reference for Spring AOP and AspectJ.''

-Paul Benedict, software program Engineer, Argus health and wellbeing Systems

''Ramnivas expertly demystifies the remarkable energy of aspect-oriented programming.''

-Craig partitions, writer of Spring in Action

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Extra resources for Aspectj in Action: Enterprise AOP with Spring Applications

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This was the implementation technique used in early implementations of AspectJ. The approach suffers from several drawbacks because the executable code can’t be easily traced back to the original source code. For example, stack traces indicate line numbers in woven source code. Another approach first compiles the source code using the base language compiler. Then, the resulting files are fed to the aspect compiler, which weaves those files. 6 shows a schematic of a compiler-based AOP language implementation.

AOP implementation thus requires the use of a processor—weaver—to perform these steps. An AOP system can implement the weaver in various ways. A simple approach uses source-to-source translation. Here, the weaver processes source code for individual classes and aspects to produce woven source code. The aspect compiler then feeds this woven code to the base language compiler to produce the final executable code. This was the implementation technique used in early implementations of AspectJ. The approach suffers from several drawbacks because the executable code can’t be easily traced back to the original source code.

5 Implementing a security concern using AOP techniques: The security aspect defines the interception points needing security and invokes the security API upon the execution of those points. The client modules no longer contain any security-related code. 3 9 Anatomy of an AOP language The AOP methodology is just that—a methodology. In order to be of any use in the real world, it must be implemented, or realized. Each realization of AOP involves specifying a language or a framework and associated tools.

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