264 research outputs found
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MicroMAIS: executing and orchestrating Web services on constrained mobile devices
Mobile devices with their more and more powerful resources allow the development of mobile information systems in which services are not only provided by traditional systems but also autonomously executed and controlled in the mobile devices themselves. Services distributed on autonomous mobile devices allow both the development of cooperative applications without a back-end infrastructure and the development of applications blending distributed and centralized services. In this paper, we propose MicroMAIS: an integrated platform for supporting the execution of Web service-based applications natively on a mobile device. The MicroMAIS platform is composed of mAS and Ī¼-BPEL. The former allows the execution of a single Web service, whereas the latter permits the orchestration of several Web services according to the WS-BPEL standard
An SOA-based model for the integrated provisioning of cloud and grid resources
In the last years, the availability and models of use of networked computing resources within reach of e-Science are rapidly changing and see the coexistence of many disparate paradigms: high-performance computing, grid, and recently cloud. Unfortunately, none of these paradigms is recognized as the ultimate solution, and a convergence of them all should be pursued. At the same time, recent works have proposed a number of models and tools to address the growing needs and expectations in the field of e-Science. In particular, they have shown the advantages and the feasibility of modeling e-Science environments and infrastructures according to the service-oriented architecture. In this paper, we suggest a model to promote the convergence and the integration of the different computing paradigms and infrastructures for the dynamic on-demand provisioning of resources from multiple providers as a cohesive aggregate, leveraging the service-oriented architecture. In addition, we propose a design aimed at endorsing a flexible, modular, workflow-based computing model for e-Science.
The model is supplemented by a working prototype implementation together with a case study in the applicative domain of bioinformatics, which is used to validate the presented approach and to carry out some performance and scalability measurements
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Towards an aspect weaving BPEL engine
This position paper proposes the use of dynamic aspects and
the visitor design pattern to obtain a highly configurable and
extensible BPEL engine. Using these two techniques, the
core of this infrastructural software can be customised to
meet new requirements and add features such as debugging,
execution monitoring, or changing to another Web Service
selection policy. Additionally, it can easily be extended to
cope with customer-specific BPEL extensions. We propose
the use of dynamic aspects not only on the engine itself
but also on the workflow in order to tackle the problems of
Web Service hot deployment and hot fixes to long running
processes. In this way, composing aWeb Service "on-the-fly"
means weaving its choreography interface into the workflow
Enabling integration and aggregation of context information into WS-BPEL processes
Previously, techniques of Context-Aware Computing were limited only to small scale monolithic applications due to the lack of standardized technologies which could support interoperability of services owned by different organizations. The advancement in Service-Oriented Computing technology allowed autonomous and heterogeneous applications to be exposed as Web Services and interconnected into service compositions exploiting well-agreed interfaces, protocols and message formats. The Web Service Business Process Execution Language (WS-BPEL) is the de-facto standard for composing reusable Web services. To enable handling of context information in applications, context information has to be made available within service compositions; hence, integrated in WS-BPEL processes. Through this means, new innovative context-enriched services can be built and provided using the convergence of context-aware computing and workflow technology. In this diploma thesis, context information provided by the C-CAST Context Management Framework and Google Maps Web services, is integrated into WS-BPEL, and business modelers are supported with the creation of context-based compositions. After surveying some of the current best practice and relevant literature in this area, this thesis presents a solution to this problem based on the Integration Process Pattern work previously done at the Institute of Architecture of Application Systems at the University of Stuttgar
Service-Oriented Process Models in Telecommunication Business
The thesis concentrates on to evaluate challenges in the business process management and the need for Service-oriented process models in telecommunication business to alleviate the integration work efforts and to reduce total costs of ownership. The business aspect concentrates on operations and business support systems which are tailored for communication service providers. Business processes should be designed in conformance with TeleManagement Forum's integrated business architecture framework. The thesis rationalizes the need to transform organizations and their way of working from vertical silos to horizontal layers and to understand transformational efforts which are needed to adopt a new strategy.
Furthermore, the thesis introduces service characterizations and goes deeper into technical requirements that a service compliant middleware system needs to support. At the end of the thesis Nokia Siemens Networks proprietary approach ā Process Automation Enabling Suite is introduced, and finally the thesis performs two case studies. The first one is Nokia Siemens Networks proprietary survey which highlights the importance of customer experience management and the second one is an overall research study whose results have been derived from other public surveys covering application integration efforts
Intelligent business processes composition based on mas, semantic and cloud integration (IPCASCI)
[EN]Component reuse is one of the techniques that most clearly contributes to the
evolution of the software industry by providing efficient mechanisms to create quality
software. Reuse increases both software reliability, due to the fact that it uses
previously tested software components, and development productivity, and leads to a
clear reduction in cost.
Web services have become are an standard for application development on cloud
computing environments and are essential in business process development. These
services facilitate a software construction that is relatively fast and efficient, two
aspects which can be improved by defining suitable models of reuse. This research
work is intended to define a model which contains the construction requirements of
new services from service composition. To this end, the composition is based on
tested Web services and artificial intelligent tools at our disposal.
It is believed that a multi-agent architecture based on virtual organizations is a
suitable tool to facilitate the construction of cloud computing environments for
business processes from other existing environments, and with help from ontological
models as well as tools providing the standard BPEL (Business Process Execution
Language). In the context of this proposal, we must generate a new business process
from the available services in the platform, starting with the requirement
specifications that the process should meet. These specifications will be composed of a
semi-free description of requirements to describe the new service.
The virtual organizations based on a multi-agent system will manage the tasks
requiring intelligent behaviour. This system will analyse the input (textual description
of the proposal) in order to deconstruct it into computable functionalities, which will
be subsequently treated. Web services (or business processes) stored to be reused
have been created from the perspective of SOA architectures and associated with an
ontological component, which allows the multi-agent system (based on virtual
organizations) to identify the services to complete the reuse process.
The proposed model develops a service composition by applying a standard BPEL
once the services that will compose the solution business process have been
identified. This standard allows us to compose Web services in an easy way and
provides the advantage of a direct mapping from Business Process Management
Notation diagrams
Flexible coordination techniques for dynamic cloud service collaboration
The provision of individual, but also composed services is central in cloud service provisioning. We describe a framework for the coordination of cloud services, based on a tupleāspace architecture which uses an ontology to describe the services. Current techniques for service collaboration offer limited scope for flexibility. They are based on statically describing and compositing services. With the open nature of the web and cloud services, the need for a more flexible, dynamic approach to service coordination becomes evident. In order to support open communities of service providers, there should be the option for these providers to offer and withdraw their services to/from the community. For this to be realised, there needs to be a degree of selfāorganisation. Our techniques for coordination and service matching aim to achieve this through matching goalāoriented service requests with providers that advertise their offerings dynamically. Scalability of the solution is a particular concern that will be evaluated in detail
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