Verification of functional and non-functional requirements of web service composition

• Main Authors: CHEN, Manman, TAN, Tian Huat, SUN, Jun, LIU, Yang, PANG, Jun, LI, Xiaohong
• Format: text
• Language: English
• Published: Institutional Knowledge at Singapore Management University 2013
• Subjects: Model Check; Component Service; Composite Service Label Transition System Manufacture Service; Software Engineering
• Online Access: https://ink.library.smu.edu.sg/sis_research/5000; https://ink.library.smu.edu.sg/context/sis_research/article/6003/viewcontent/verification.pdf
• Institution: Singapore Management University

Web services have emerged as an important technology nowadays. There are two kinds of requirements that are crucial to web service composition, which are functional and non-functional requirements. Functional requirements focus on functionality of the composed service, e.g., given a booking service, an example of functional requirements is that a flight ticket with price higher than $2000 will never be purchased. Non-functional requirements are concerned with the quality of service (QoS), e.g., an example of the booking service’s non-functional requirements is that the service will respond to the user within 5 seconds. Non-functional requirements are important to web service composition, and are often an important clause in service-level agreements (SLAs). Even though the functional requirements are satisfied, a slow or unreliable service may still not be adopted. In our paper, we propose an automated approach to verify combined functional and non-functional requirements directly based on the semantics of web service composition. Our approach has been implemented and evaluated on the real-world case studies, which demonstrate the effectiveness of our method.