2009 17th Euromicro International Conference on Parallel, Distributed and Network-based Processing, 2009
This paper introduces the PeerSE experiment environment (EE) including concepts for a simulation-... more This paper introduces the PeerSE experiment environment (EE) including concepts for a simulation-based analysis and implementation of P2P systems. The PeerSE EE supports a comparative analysis of P2P system models to identify models fulfilling given requirements. In a next step, model components are reused for implementing laboratory and real-world P2P systems. The integrated visualization for simulation and laboratory experiment results helps developers to compare the behavior of simulation models and laboratory systems. Thus, the PeerSE EE allows a controlled transition of model components to laboratory components. The applicability of the PeerSE EE is demonstrated by exemplarily analyzing and implementing a P2P system.
33rd EUROMICRO Conference on Software Engineering and Advanced Applications (EUROMICRO 2007), 2007
Component-based business-critical systems evolve during their life cycle in order to meet changin... more Component-based business-critical systems evolve during their life cycle in order to meet changing requirements or to improve quality properties. At the same time, maintaining continuous availability of services is an issue with increasing importance for these systems. Runtime reconfiguration supports evolution of systems while maintaining availability of services they provide. In this paper, we present a new approach to runtime
2007 Working IEEE/IFIP Conference on Software Architecture (WICSA'07), 2007
ABSTRACT The MID ARCH method is a software design method for exploring software architecture alte... more ABSTRACT The MID ARCH method is a software design method for exploring software architecture alternatives that use different middleware platforms. First, candidate architectures are modelled based on different architectural styles that are induced by the respective middleware platforms. Candidate styles are chosen using a taxonomy of such styles. The goal is the evaluation of candidate architectures with respect to a goal/question/metric quality model. We illustrate the modelling approach using the Apache Cocoon Web component framework and related technologies, and a taxonomy of their associated styles.
This chapter introduces model-driven integration in complex information systems by giving two pra... more This chapter introduces model-driven integration in complex information systems by giving two practical examples. It relies on the experiences the authors have made in two different research projects at the public utilities domain. The chapter starts with a short introduction of the ...
Studies in health technology and informatics, 1997
An important concern in distributed hospital information systems is the integration of informatio... more An important concern in distributed hospital information systems is the integration of information across heterogeneous subsystems. Consistent data replication is a central problem to be solved in this domain. The specific requirements and problems for integration of information within hospitals are discussed and a middleware architecture which has been designed according to these requirements is presented. Communication servers are often deployed in hospitals to connect heterogeneous subsystems. This paper discusses some problems with this approach and presents a federated schema-based middleware architecture as an alternative solution for propagation of information updates across heterogeneous subsystems within hospitals.
2009 17th Euromicro International Conference on Parallel, Distributed and Network-based Processing, 2009
This paper introduces the PeerSE experiment environment (EE) including concepts for a simulation-... more This paper introduces the PeerSE experiment environment (EE) including concepts for a simulation-based analysis and implementation of P2P systems. The PeerSE EE supports a comparative analysis of P2P system models to identify models fulfilling given requirements. In a next step, model components are reused for implementing laboratory and real-world P2P systems. The integrated visualization for simulation and laboratory experiment results helps developers to compare the behavior of simulation models and laboratory systems. Thus, the PeerSE EE allows a controlled transition of model components to laboratory components. The applicability of the PeerSE EE is demonstrated by exemplarily analyzing and implementing a P2P system.
33rd EUROMICRO Conference on Software Engineering and Advanced Applications (EUROMICRO 2007), 2007
Component-based business-critical systems evolve during their life cycle in order to meet changin... more Component-based business-critical systems evolve during their life cycle in order to meet changing requirements or to improve quality properties. At the same time, maintaining continuous availability of services is an issue with increasing importance for these systems. Runtime reconfiguration supports evolution of systems while maintaining availability of services they provide. In this paper, we present a new approach to runtime
2007 Working IEEE/IFIP Conference on Software Architecture (WICSA'07), 2007
ABSTRACT The MID ARCH method is a software design method for exploring software architecture alte... more ABSTRACT The MID ARCH method is a software design method for exploring software architecture alternatives that use different middleware platforms. First, candidate architectures are modelled based on different architectural styles that are induced by the respective middleware platforms. Candidate styles are chosen using a taxonomy of such styles. The goal is the evaluation of candidate architectures with respect to a goal/question/metric quality model. We illustrate the modelling approach using the Apache Cocoon Web component framework and related technologies, and a taxonomy of their associated styles.
This chapter introduces model-driven integration in complex information systems by giving two pra... more This chapter introduces model-driven integration in complex information systems by giving two practical examples. It relies on the experiences the authors have made in two different research projects at the public utilities domain. The chapter starts with a short introduction of the ...
Studies in health technology and informatics, 1997
An important concern in distributed hospital information systems is the integration of informatio... more An important concern in distributed hospital information systems is the integration of information across heterogeneous subsystems. Consistent data replication is a central problem to be solved in this domain. The specific requirements and problems for integration of information within hospitals are discussed and a middleware architecture which has been designed according to these requirements is presented. Communication servers are often deployed in hospitals to connect heterogeneous subsystems. This paper discusses some problems with this approach and presents a federated schema-based middleware architecture as an alternative solution for propagation of information updates across heterogeneous subsystems within hospitals.
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Papers by W. Hasselbring