A Resource-Aware Model-Based Framework for Load Testing of WS-BPEL Compositions

Abstract

Nowadays, Web services compositions are playing a major role in the implementation of different types of distributed architectures. Such applications usually provide services to hundreds of users simultaneously. Load Testing is considered as an important type of testing for Web services compositions, as such applications require concurrent access by many users simultaneously. In this context, load testing for these types of applications seems an important task in order to discover problems under high loads. For this goal, we propose a model-based resource aware test architecture aiming to study the behavior of WS-BPEL compositions taking into account load conditions. The main contribution of this work consists of (a) adopting the timed automata formalism to model the system under test and to generate digital-clock test suites (b) identifying the best node for hosting each tester instance, then (c) running load tests and recording performance data and finally (d) analyzing the obtained logs in order to detect problems under load. Our approach is illustrated by means of a case study from the healthcare domain.