By Awais Rashid
Recently, a brand new set of software program improvement innovations has turn into on hand, jointly termed Aspect-Oriented software program improvement (AOSD). This goals to help the modularization of systemic homes (also known as crosscutting issues) and their next composition with the opposite components of a process.
Rashid makes a speciality of using Aspect-Oriented Programming (AOP) concepts to modularize differently commonly scoped good points in database structures, corresponding to the evolution or the versioning version, to enhance their customizability, extensibility and maintainability. He indicates how using AOP can rework the way in which we increase, use and hold database platforms. He additionally discusses how database structures can aid AOP by way of offering a way for the garage and retrieval of aspects.
"Aspect-Oriented Database platforms" exhibits the potential synergy among AOP and database structures, and is of specific curiosity to researchers, graduate scholars and software program builders in database structures and applications.
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Additional resources for Aspect-Oriented Database Systems
2001; Orleans and Lieberherr 2001) and reflective techniques (Pawlak, Seinturier, et al. 2001) through to multidimensional (Tarr, Ossher, et al. 1999) and hybrid (Rashid 2001c) approaches. Next, we look at these various sets of techniques in more detail. 1 Aspect Languages Aspect languages offer constructs additional to those supported by a base language (object-oriented, procedural or other) in order to facilitate formulation of the aspect code separately from the abstractions in the base language.
1987; Fishman 1987; Li and McLeod 1994; Ferrandina, Meyer, et al. 1995; Peters and Ozsu 1997; Dmitriev 1998), where the database has one logical schema to which all changes are applied. No historical representations of class definitions are kept. • Schema versioning (Kim and Chou 1988; Lerner and Habermann 1990; Odberg 1992; Ra and Rundensteiner 1997), which allows several versions of one logical schema to be created and manipulated independently. Change histories are maintained at a coarse granularity.
The former is a DBMS level concern and is the code that forms part of the schema manager. It defines the instance adaptation strategy for the system, for instance, simulated conversion or physical conversion. An instance adaptation routine, on the other, hand is the code specific to a class or its historical representation (depending on whether change histories are maintained). It is, therefore, a database level concern and defines adaptation semantics for instances of the particular class definition.
Aspect-Oriented Database Systems by Awais Rashid
Categories: Object Oriented Design