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AspectWerkz is a dynamic, lightweight and high-performance AOP/AOSD framework for Java. It has been merged with the AspectJ project, which supports AspectWerkz functionality since AspectJ 5.

Unlike AspectJ prior to version 5, AspectWerkz did not add any new language constructs to Java, but instead supported declaration of aspects within Java annotations.

AspectWerkz offers both power and simplicity and will help you to easily integrate AOP in both new and existing projects.

AspectWerkz utilizes bytecode modification to weave your classes at project build-time, class load time or runtime. It hooks in using standardized JVM level APIs. It has a rich and highly orthogonal join point model. Aspects, advices and introductions are written in plain Java and your target classes can be regular POJOs. You have the possibility to add, remove and re-structure advice as well as swapping the implementation of your introductions at runtime. Your aspects can be defined using either Java 5 annotations, Java 1.3/1.4 custom doclets or a simple XML definition file.

AspectWerkz provides an API to use the very same aspects for proxies, hence providing a transparent experience, allowing a smooth transition for users familiar with proxies.

AspectWerkz performance is reported in this separate project.

AspectWerkz is Free Software. The LGPL-style license allows the use of AspectWerkz 2.0 in both commercial and open source projects.

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