Aspect-Oriented Database Systems - download pdf or read online

By Awais Rashid

ISBN-10: 3642056695

ISBN-13: 9783642056697

ISBN-10: 3662058510

ISBN-13: 9783662058510

Recently, a brand new set of software program improvement strategies has develop into on hand, jointly termed Aspect-Oriented software program improvement (AOSD). This goals to help the modularization of systemic homes (also often called crosscutting issues) and their next composition with the opposite elements of a approach.

Rashid specializes in using Aspect-Oriented Programming (AOP) innovations to modularize differently generally scoped gains in database platforms, akin to the evolution or the versioning version, to enhance their customizability, extensibility and maintainability. He exhibits how using AOP can remodel the way in which we advance, use and preserve database structures. He additionally discusses how database structures can help AOP by means of supplying a way for the garage and retrieval of aspects.

"Aspect-Oriented Database platforms" indicates the prospective synergy among AOP and database structures, and is of specific curiosity to researchers, graduate scholars and software program builders in database platforms and applications.

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2b shows a specific exampIe of this situation in the form of tracing code, often used in debugging, spread across the code for classes A and B. Ideally tracing statements should be treated as a concern in their own right as they do not contribute to the primary application logic implemented by classes A and B. Inheritance might be perceived as a solution to the code tangling shown in Figs. , synchronisation) in a superclass. An inheritance-based solution, however, simply shifts the code tangling problem to a different dimension: extensive invocation and overriding of superclass methods in subclasses.

3 shows the anatomy of an aspect in AspectJ. , points at which an object receives a method call or has its fields referenced. These include (among others) method/constructor call and execution, field get and set, and exception handler execution. ,_ III_I---- =~=~ rocmodularising /_- - 1"-----1-.... Collection ofjoin points and. lly. some of\he values In thdT c:)(eculion COnlc:':1 Well defined points in the e «uliOn or SI prog;nm , ----I-... ConstNCt used to "Ilne ~diliolUll behaviour a! gelAdd

2c. Aspect-Oriented programming aspect trace Join Points: all method executions in all objects before Join Points print ("Entering " + method signature) after Join Points print ("Entering " + method signature) Fig. 2d. A tracing aspect in pseudo code Note that, at this stage, the terminology for AOP has not yet been standardised. The terms aspect, join point and weaver are used as defacto standards though their exact meaning can differ across systems and personal perceptions. Efforts are underway to define common semantics for AOP techniques.

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Aspect-Oriented Database Systems by Awais Rashid

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