Aspect-Oriented Modeling Of Isomerous Dynamic Real-time System In Grid Environment

In the complex dynamic distributional real time system,the description, the control, the management, the consultation and the guarantee of Qos is a very complex and challenging work,Quality of Service(QoS) is directly related to system's performance. But the There are still have a completely, workable technical system in QoS Research, without a solution successfully satified all the requirement in the complex dynamic distributional real time system environment.The grid is running above the Internet, the pure network QoS mechanism cannot guarantee the grid application QoS.Besides network resource,there also has the computation, the memory and so on other type resources In grid. The grid application needs all these grid resources, including the network resource, can provides the corresponding QoS guarantee to the grid application.Because of the isomerism, the distributivity, the dynamic and the autonomy in complex dynamic distributional real time system, there always has the similar problem in distributional system's modelling. Without considering of the partial failure, the dynamic changing of bandwidth , the security essential factors and so on, Object-Oriented is a very good abstracts way. But when it faces time aspect appearing in the distributional system, the Object-Oriented design has lost its superiority very obviously. We introduce a mechanism called Aspect-Oriented to intergrate each dispersion service in aspect, This mechanism could take QoS in the distributional software as an aspect.This article build the distributional system's QoS model. through extensing the unification modelling language(UML), First, we establish a QoS frame metamodel, then we establish a QoS profile model, extense the UML to QoS modelling language(QML) for supporting Aspects, and analyzes this modelling language through the simple example. Finally, we explained how to establish real time system's model, using AOP based on UML.We can abstract QoS concern to a independent QoS Aspect from the whole system, through integrating with the traditional QoS architecture. Then we can implete the Aspect-Oriented modeling mathod, through the structure modelling, the behavior modelling, the aspect weaving, as well as the code producing, provide better QoS guarantee in grid environment, separate the QoS concern, enhances the software's reusability.