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Web-Based Software Infrastructure for Service-Oriented Science (pp.93-112) $100.00
Authors:  (Alexander Afanasiev, Oleg Sukhoroslov, Centre for Grid Technologies and Distributed Computing, ISA RAS, Russia)
The paper presents a Web-based software infrastructure for service-oriented scientific
environments. The concept of Service-Oriented Science introduced by Ian Foster in 2005
refers to scientific research enabled by distributed networks of interoperating services. The
service-oriented architecture opens up new opportunities for science by enabling wide-scale
sharing, publication and reuse of scientific applications, as well as automation of scientific
tasks and composition of applications into new services. We argue that existing serviceoriented
grid middleware, though providing a mature software infrastructure for federation of
computing resources, is too complex and don't provide adequate tools for building serviceoriented
scientific environments. Therefore we propose a novel software infrastructure aimed
on radical simplification of service development, deployment and use. In contrast to grid
middleware based on Web Services specifications the proposed infrastructure embraces a
more lightweight approach by using the REST architectural style, Web technologies and Web
2.0 application models. According to the proposed approach each service represents a
RESTful web service with a unified API enabling service introspection, request submission
and retrieval of request results. The RESTful API supports asynchronous request processing
and passing large data files as links. The core component of proposed software infrastructure
is a service container which implements the RESTful API and provides a hosting environment
for services. The service container simplifies service development and deployment by
providing ready-to-use adaptors for command-line, Java and grid applications. The service
composition is a crucial aspect of service-oriented systems enabling various application
scenarios. Therefore we implemented a workflow management system with a Web-based
graphical user interface. The user interface is inspired by Yahoo! Pipes and provides easy-touse
tools for building workflows by connecting services with each other. The created
workflow can be published as a new service thus contributing back to the environment. 

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Web-Based Software Infrastructure for Service-Oriented Science (pp.93-112)