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Accurate and rapid evaluation of web service performance is a key problem of Service-Oriented Architecture (SOA), where services are continuously being (re-)designed and released, and integrated within heterogeneous environments. Unfortunately, pre-deployment testing of services is not suitable to evaluate service performance at both design time and runtime. As a result, often process designers get...
Web Services (WS) are software components accessible over the Internet through a well-defined set of standards. When consumers invoke a service, they expect to receive a valid response. However, the problem is to determine the structure of a valid request [21]. WS specifications are used to solve this problem since they are considered the primary piece of information for building service requests...
Service-Oriented Computing (SOC) provides a flexible framework in which applications may be built up from services, often distributed across a network. One of the promises of SOC is that of Dynamic Binding where abstract consumer requests are bound to concrete service instances at runtime, thereby offering a high level of flexibility and adaptability. Existing research has so far focused mostly on...
Web services are designed as software building blocks for Service Oriented Architecture (SOA). It provides an approach to software development that system and application can be constructed by assembling reusable software building blocks, called services. The industries have adopted web services composition to generate new business applications or mission critical services. One of the most popular...
Web service compositions must provide services to hundreds even thousands of users concurrently. These applications must be load tested to ensure that they can function properly under high load. We propose in this paper a solution for load testing of WS-BPEL compositions. It is based on Timed Automata as model for specifying requirements to test under various load conditions, a distributed testing...
Encapsulating IoT resources in services with comprehensive semantic descriptions of the involved components is a promising approach to overcome current silo architectures in the IoT domain. More important than the enablement of service composition, automated test derivation is expected to be on of the key drivers of rapid creation of robust IoT applications. The paper describes how concepts for semantically...
Developing, for example, a simple booking web service with modern tools can be a matter of a few weeks work. Testing such a system should not need to take more time than that. Automatically generating tests from specified properties of the system using the tool QuickCheck provides professional developers with the required test efficiency. But how good is the quality of these automatically generated...
Cloud computing is a paradigm that offers on-demand scalable resources with the “pay-perusage” model. Cloud service providers' price rises linearly as the resources scale. However, the main challenge for the cloud customers is “Does the performance scale as the price for the rented resources in the cloud”? Also, how does the performance scales for different server load? In this paper we analyze the...
Composition plays a cornerstone role for SOC in constructing applications, in which each component is a service with its exposing interface in WSDL. One overlooked potential downside to SOC is the high possibility of component service failure. Even a single component goes down, the whole application could wreak havoc. To prevent an application from such disaster, it would be best to exploit plenty...
The behavioral composition of services entails the computation of the asynchronous product of automata. The resulting product is tested for bisimulation equivalence with the requested service. This equivalence testing becomes infeasible when the number of services is large. In this paper we propose a symbolic method, based on OBDD, to make the computation feasible. The efficiency of our solution stems...
Developers often rely on penetration testing tools to detect vulnerabilities in web services, although frequently without really knowing their effectiveness. In fact, the lack of information on the internal state of the tested services and the complexity and variability of the responses analyzed, limits the effectiveness of such technique, highlighting the importance of evaluating and improving existing...
Service-Oriented Computing (SOC) provides a flexible framework in which applications are built up from services, often distributed across a network. One of the promises of SOC is that of Dynamic Binding where abstract consumer requests are bound to concrete service instances at runtime. What is clear from existing research is that there exist several components that help to provide the necessary behavior...
Software technology has become essential to business today and most companies use computational systems at least to advertise their products to market. Powered by the Internet, information quickly flows throw systems and Web Services provide a standard way to meet these objectives with the use of common communication patterns, like XML and HTTP. The use of Web Services brings many benefits but, at...
Web services are widely known as the building blocks of typical service oriented applications. The performance of such an application system is mainly dependent on that of component web services. Thus the effective load testing of web services is of great importance to understand and improve the performance of a service oriented system. However, existing Web Service load testing tools ignore the real...
Applications are increasingly constructed by orchestrating Web services. Ensuring the reliability of such loosely coupled service compositions is a challenging task. In this paper, we propose an automatic scenario-oriented testing approach for service compositions specified by Business Process Execution Language (BPEL). In our approach, an abstract test model (BGM) is first defined to represent the...
We propose in this paper a new approach for conformance testing of WS-BPEL compositions. It is based on Timed Automata as model for testing WS-BPEL implementations, a distributed testing architecture and an algorithm for online test generation and execution. We also implemented our solution in the form of a prototype tool named WSCCT.
Automated web service composition can largely reduce human efforts in business integration. We present an approach to fully automate web service composition without workflow or knowing the semantic meaning of atomic web service. The experiment results show that the accuracy of our composition method using Genetic Programming (GP), in terms of the number of times an expected composition that can be...
In recent years, Service Oriented Architecture (SOA) has been increasingly adopted to develop applications in the context of Internet. To develop reliable SOA-based applications, an important issue is how to ensure the quality of Web services. In this paper, we propose a dynamic random testing (DRT) technique for Web services which is an improvement of the widely practiced random testing. We examine...
We propose in this paper a new approach for conformance testing of WS-BPEL compositions under various load conditions. It is based on Timed Automata as model for testing WS-BPEL implementations, a distributed testing framework that automatically generates and executes parallel tests online, and an algorithm for online test generation and execution. We also implemented a part of our solution in the...
The paper focuses on developing a cloud energy-saving and data-mining information agent with Web service techniques. It could explore related technologies to establish a Web service platform, and study how to construct cloud interactive diagrams to employ Web service techniques for extensively and seamlessly integrating an energy-saving and data-mining information agent in the Internet. The preliminary...
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