aspect-oriented programming
(AOP) A style of programming that attempts to abstract out features common to many parts of the code beyond simple functional modules and thereby improve the ef="module.php?name=Lexikon&file=search&eid=1&query=quality">quality of software. Mechanisms for defining and composing ef="module.php?name=Lexikon&file=search&eid=1&query=abstractions">abstractions are essential elements of programming languages. The design style supported by the abstraction mechanisms of most current languages is one of breaking a system down into parameterised components that can be called upon to perform a function. But many systems have properties that don' t necessarily align with the system' s functional components, such as failure handling, ef="module.php?name=Lexikon&file=search&eid=1&query=persistence">persistence, communication, replication, coordination, ef="module.php?name=Lexikon&file=search&eid=1&query=memory management">memory management, or ef="module.php?name=Lexikon&file=search&eid=1&query=real-time">real-time constraints, and tend to cut across groups of functional components. While they can be thought about and analysed relatively separately from the basic functionality, programming them using current ef="module.php?name=Lexikon&file=search&eid=1&query=component-oriented languages">component-oriented languages tends to result in these aspects being spread throughout the code. The ef="module.php?name=Lexikon&file=search&eid=1&query=source code">source code becomes a tangled mess of instructions for different purposes. This "tangling" phenomenon is at the heart of much needless complexity in existing software systems. A number of researchers have begun working on approaches to this problem that allow programmers to express each of a system' s aspects of concern in a separate and natural form, and then automatically combine those separate descriptions into a final executable form. These approaches have been called aspect-oriented programming. {Xerox AOP homepage (http://www.parc.xerox.com/csl/projects/aop/)}. ef="http://AspectJ.org/">AspectJ . {eCOOPP' 99 AOP workshop (http://wwwtrese.cs.utwente.nl/aop-ecoop99/)}. (1999-11-21) e="border-width:thin; border-color:#333333; border-style:dashed; padding:5px;" align="left">In addition suitable contents:
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