Jörg Niemöller

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In this paper we provide an outline and characteristics of a language that allows the design of compositions within a heterogeneous service landscape. Heterogeneous refers to services from various industries and application domains like for example telecommunication, enterprise, web 2.0 and general IT. The language shall enable to use services from all(More)
In this paper we describe our findings and experiences with regards to scalable service composition execution. More specifically we detail the process of redesigning our original core for service composition execution to adhere to a more asynchronous, event-driven, non-blocking paradigm. The outcome of this work is an asynchronous core that is scalable;(More)
This paper investigates requirements and proposes solutions for charging of composite services. An analysis of the relations between the service user, service broker and service provider with respect to charging suggests that the price a service broker asks from the user of a composite service is in general decoupled from the price the service broker pays(More)
The 4CaaSt project aims at developing a PaaS framework that enables flexible definition, marketing, deployment and management of Cloud-based services and applications. The major innovations proposed by 4CaaSt are the blueprint and its lifecycle management, a one stop shop for Cloud services and a PaaS level resource management featuring elasticity. 4CaaSt(More)
—Experiences of users determine their actions and therefore have great influence on the business result of service providers. Thus, it is highly important to know and control these experiences. Decisions and actions are most effective if they are based on individual users and their detailed experience history. Currently available methods for measuring user(More)
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