QoS Aggregation Evaluation of Web Services Composition with Transaction

Since composite Web services are long-lasting, loosely coupled and cross application and administrative boundaries, transaction mechanism is required. So far, the evaluation method about quality of services (QoS) of Web services composition focuses on relaxing some of the ACID(Atomicity, Consistency, Integrity and Durability) properties of transaction model and there is almost no further research on how QoS influence composite services transactions. This paper presents a QoS evaluation method about aggregation transactions when failure occurs and defines QoS evaluation model of the common aggregation patterns of transaction compensation. Experiment results show that when it is used to evaluate the QoS of composite Web services, QoS evaluation method of aggregation transaction compensation is much better than the Web services composition method based on random selection, and is feasible and effective.