On expanding protocol conformance checking to exception handling

摘要

Components or services must often be compliant to organizatorial or legal regulations. Furthermore, they should avoid unwanted behaviour such as abortion of the execution of a service without notification of the client. Violation of both might happen due to unintended uses of services. In general, the intention is specified by contracts. In this work, we consider a special form of contracts: service protocols. These specify for a service legal sequences of operation calls. We propose an approach for checking whether such protocols are obeyed in a service composition. For this, it is necessary to define a conservative abstraction of the behaviour of service-oriented systems and a contract based on interactions (named service protocol) to be verified. In our previous work, we have modelled unbound concurrency, unbound recursion, and synchronization. This article briefly presents the previous results and extends them by exception handling mechanisms. In particular, it takes into account that the execution of service may raise an exception and allows the clients to react on the exception.