Providing scalability for an automated web service composition framework

Kaya, Ertay
In this thesis, some enhancements to an existing automatic web service composition and execution system are described which provide a practical significance to the existing framework with scalability, i.e. the ability to operate on large service sets in reasonable time. In addition, the service storage mechanism utilized in the enhanced system presents an effective method to maintain large service sets. The described enhanced system provides scalability by implementing a pre-processing phase that extracts service chains and problem initial and goal state dependencies from service descriptions. The service storage mechanism is used to store this extracted information and descriptions of available services. The extracted information is used in a forward chaining algorithm which selects the potentially useful services for a given composition problem and eliminates the irrelevant ones according to the given problem initial and goal states. Only the selected services are used during the AI planning and execution phases which generate the composition and execute the services respectively.


An approach for including business requirements to soa design
Ocaktürk, Murat; Doğru, Ali Hikmet; Department of Computer Engineering (2010)
In this thesis, a service oriented decomposition approach: Use case Driven Service Oriented Architecture (UDSOA), is introduced to close the gap between business requirements and SOA (Service Oriented Architecture) design by including business use cases and system use cases into decomposition process. The approach is constructed upon Service Oriented Software Engineering (SOSE) modeling technique and aims to fill the deficits of it at the decomposition phase. Further, it aims to involve both business vision...
A monolithic approach to automated composition of semantic web services with the event calculus
Okutan, Çağla; Çiçekli, Fehime Nihan; Department of Computer Engineering (2009)
In this thesis, a web service composition and execution framework is presented for semanti- cally annotated web services. A monolithic approach to automated web service composition and execution problem is chosen, which provides some benefits by separating the composi- tion and execution phases. An AI planning method using a logical formalism called Event Calculus is chosen for the composition phase. This formalism allows one to generate a nar- rative of actions and temporal orderings using abductive planni...
Automatic composition of semantic web services with the abductive event calculus
Kırcı, Esra; Çiçekli, Fehime Nihan; Department of Computer Engineering (2008)
In today's world, composite web services are widely used in service oriented computing, web mashups and B2B Applications etc. Most of these services are composed manually. However, the complexity of manually composing web services increase exponentially with the increase in the number of available web services, the need for dynamically created/updated/discovered services and the necessity for higher amount of data bindings and type mappings in longer compositions. Therefore, current highly manual web servic...
Modeling of software as a service architectures and investigation on their design alternatives
Öztürk, Karahan; Doğru, Ali Hikmet; Department of Computer Engineering (2010)
In general, a common reference architecture can be derived for Software as a Service (SaaS) architecture. However, while designing particular applications one may derive various different application design alternatives from the same reference SaaS architecture specification. To meet the required functional and nonfunctional requirements of different enterprise applications it is important to model the possible design so that a feasible alternative can be defined. In this thesis, we propose a systematic app...
Semantically enriched web service composition in mobile environments
Ertürkmen, K. Alpay; Doğaç, Asuman; Department of Information Systems (2003)
Web Services are self-contained, self-describing, modular applications that can be published, located, and invoked through XML artefacts across the Web. Web services technologies can be applied to many kinds of applications, where they offer considerable advantages compared to the old world of product-specific APIs, platform-specific coding, and other أbrittleؤ technology restrictions. Currently there are millions of web services available on the web due to the increase in e-commerce business volume. Web se...
Citation Formats
E. Kaya, “Providing scalability for an automated web service composition framework,” M.S. - Master of Science, Middle East Technical University, 2010.