Doctoral Seminar: Touraj Laleh

Speaker: Touraj Laleh

Supervisor: Dr. J. Paquet

Supervisory Committee:
Drs. R. Glitho, V. Haarslev, R. Witte

Title: Constraint Adaptive Web Service Composition

Date: Thursday, April 13, 2017

Time: 10:15am

Place: EV 3.309

ABSTRACT

Automatic web-service composition (AWSC) aims at automating a design of an appropriate combination of existing web services to achieve a global goal. Most proposed AWSC approaches only consider input/output parameters and quality features of services. However, most real-world web services have applicable conditions and require constraints to be considered during the design and execution phases of composite services. Constraint verification has significant impact on composition and execution of composite services. In particular, run time verification of service constraints can result in the failure of the execution of composite services and eventually waste computational resources and may incur monetary costs. In addition, traditional adaptation approaches for web service composition consider recovery in case of failure when a service becomes unavailable. They do not take into account situations when constraints and business requirements change at runtime, but the non-compliant services are still available. In our research, we focus on verification of constraints during the composition and execution of composite services and provide a brokerage solution to exclude no longer compliant, but still available, services from service composition.