DASIS

Description

With the concept of service-oriented architectures a new paradigm found its way into the computer science: Not the application as a total concept but autonomous services, of which applications over administration borders can be composed, stand in the foreground in this paradigm. Services abstract from concrete resources, which can be addressed via uniform, public interfaces. Resources can be computing power, data memory capacity or network bandwidth. The services are usually distributed in a network and are addressed, coordinated and combined in an application by suitable mechanisms and frameworks. While for the service supply and the technical service access substantial basics already were investigated and are standardized and also application can be found, the coordination of services at run-time, their dynamic orchestration and the access by the final user still cause problems, in particular regarding characteristics like reliability and adaptivity. The characteristics of adaptivity and reliability in the context of virtual organizations are addressed by the development of services with an engineering approach. Thus custom applications that define a new dimension in the application use are to be made available for final users. Applications that are specifically tailored to the needs of the user and his current role can be arranged both by the users and the service providers. The goal of this project is to examine the necessary base conditions for attaining reliability and adaptivity and the associated dependencies in the context of a service-based architecture, to accomplish a prototypic realization and to evaluate it.

Goal

A goal of the suggested project is the systematic integration of aspects of reliability and adaptivity in the system wide interfaces and basis services. In addition, the investigation of different attributes of reliability as for example availability, robustness, security (Safety & Security), privacy and integrity is necessary. The findings must result in a universal interface definition over which all services can be coupled. The same applies to adaptivity. Here it is necessary to take into consideration the special characteristics of resources, services, workflows, and user interfaces regarding adaptivity. The findings over reliability and adaptivity can be used in service-oriented environments in order to offer a better reselection of the services and the resources already with the Service-Brokering. Thus the needs and conditions of the users can be better taken into account, and the connection at run-time can be arranged substantially more flexible and context-dependent.

Investors

Land Rheinland-Pfalz

Contact

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