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454
Contract-directed synthesis of simple orchestrators
, 2008
"... Abstract. The availability of repositories of Web service descriptions enables interesting forms of dynamic Web service discovery, such as searching for Web services exposing a specified behavior – or contract. This calls for a formal notion of contract equivalence satisfying two contrasting goals: ..."
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Cited by 8 (4 self)
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to synthesize orchestrators out of Web services contracts. 1
Real-time Web Services Orchestration and Choreography
"... Abstract. Real-Time issues are not usually considered when describing and composing web services. However, modern web services are usually involvedinthe software implementation oftime-constrained business processes [1]. The satisfaction of time constraints is crucial in order to ensure the validity ..."
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consistency of the web services. In this paper, we present a formal approach for real-time service orchestration and choreography. In this regard, we use UML-RT as a visual and user-friendly notation in order to model services and their interactions, Timed CSP as an underlying formal grounding to enable
Monotonicity in Service Orchestrations ⋆
"... Abstract. Web Service orchestrations are compositions of different Web Services to form a new service. The services called during the orchestration guarantee a given Quality of Service (QoS) to the orchestrator, usually in the form of contracts. These contracts can then be used by the orchestrator t ..."
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Cited by 7 (6 self)
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Abstract. Web Service orchestrations are compositions of different Web Services to form a new service. The services called during the orchestration guarantee a given Quality of Service (QoS) to the orchestrator, usually in the form of contracts. These contracts can then be used by the orchestrator
Probabilistic QoS and Soft Contracts for Transaction-Based Web Services Orchestrations
- IEEE Trans. on Services Computing
, 2008
"... Abstract—Service level agreements (SLAs), or contracts, have an important role in Web services. These contracts define the obligations and rights between the provider of a Web service and its client, with respect to the function and the Quality of Service (QoS). For composite services like orchestra ..."
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Cited by 46 (17 self)
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orchestrations, such contracts are deduced by a process called QoS contract composition, based on contracts established between the orchestration and the called Web services. These contracts are typically stated in the form of hard guarantees (e.g., response time always less than 5 msec). Using hard bounds
Synthesis of Orchestrators from Service Choreographies
"... Interaction topologies in service-oriented systems are usually classified into two styles: choreographies and orchestrations. In a choreography, services interact in a peer-to-peer manner and no service plays a privileged role. In contrast, interactions in an orchestration occur between one particul ..."
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Cited by 3 (0 self)
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Interaction topologies in service-oriented systems are usually classified into two styles: choreographies and orchestrations. In a choreography, services interact in a peer-to-peer manner and no service plays a privileged role. In contrast, interactions in an orchestration occur between one
Secure Service Orchestration
, 2007
"... We present a framework for designing and composing services in a secure manner. Services can enforce security policies locally, and can invoke other services in a “call-by-contract” fashion. This mechanism offers a significant set of opportunities, each driving secure ways to compose services. We di ..."
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Cited by 13 (7 self)
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We present a framework for designing and composing services in a secure manner. Services can enforce security policies locally, and can invoke other services in a “call-by-contract” fashion. This mechanism offers a significant set of opportunities, each driving secure ways to compose services. We
Orchestration Services for Distributed Multimedia Synchronisation
- in High Performance Networking, IV
, 1992
"... Rapid developments in networking technology over the past few years have lead to the emergence of distributed applications which incorporate continuous media data types such as digital video and audio. Such applications have stringent real-time synchronisation requirements which have been documented ..."
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Cited by 5 (0 self)
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Rapid developments in networking technology over the past few years have lead to the emergence of distributed applications which incorporate continuous media data types such as digital video and audio. Such applications have stringent real-time synchronisation requirements which have been
An Orchestrated Execution Environment for Hybrid Services
- Kommunikation in Verteilten Systemen (KiVS
, 2007
"... Abstract. Influenced by the success of web service technologies for the development and deployment of IT services, the telecommunications R&D community starts adapting and building similar service delivery platforms, trying to manage the hard constraints of telco domains, such as: existence of h ..."
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Cited by 2 (1 self)
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of heterogeneous protocols, extensive use of asynchronous communications and real-time delivery requirements. In this work we present a detailed analysis of an enhanced JAIN/SLEE architecture in which a workflow engine has been seamlessly integrated, being capable to orchestrate service entities from both telecom
Stable Distributed, Real-Time Scheduling Of Flexible Manufacturing / Assembly / Disassembly Systems
- IEEE Transactions on Automatic Control
, 1989
"... We consider general exible manufacturing/assembly/disassembly systems with the following features: (i) there are several part types, each with given processing time requirements at a specied sequence of machines; (ii) each part-type needs to be produced at a prespecied rate; (iii) parts may incur va ..."
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Cited by 62 (11 self)
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-29-85-K0094, and in part by the Joint Services Electronics Program under Contract No. N000...
Real-Time in Multimedia: Opportunistic Scheduling or Quality of Service Contracts?
- ISMM Conf. on Distributed Multimedia Systems and Applications
, 1994
"... We refer to a multimedia environment, consisting of workstations and servers connected by a network dealing with video and audio streams. These streams require Real-Time (RT) handling. Fortunately the requirements are not so demanding as those in Hard Real Time (HRT) systems. Therefore resources are ..."
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Cited by 1 (1 self)
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We refer to a multimedia environment, consisting of workstations and servers connected by a network dealing with video and audio streams. These streams require Real-Time (RT) handling. Fortunately the requirements are not so demanding as those in Hard Real Time (HRT) systems. Therefore resources
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454