An energy-saving model for service-oriented mobile application development

The development of mobile applications that combine Web Services from different providers --also referred as mashup applications-- is growing as a consequence of the ubiquity of bandwidth connections and the increasing number of available Web Services. In this context, providing higher maintainability to Web Service applications is a worth of matter, because of the dynamic nature of the Web. EasySOC (1) solves this problem by decoupling mashups from application components. However, mobile devices have energy constraints because of the limitations in the current battery capacities. This work proposes a model that builds on the benefits of the EasySOC approach and improves this latter by assisting developers to select Web Service combinations that reduce energy consumption. We evaluated the feasibility of the model through a case study in which we compare the estimations provided by the model against real energy measurements. The results indicated that our model had an efficacy of 81% for the analyzed case study.Sociedad Argentina de Informática e Investigación Operativa (SADIO

Practical Assessment Scheme to Service Selection for SOC-­based Applications

Service ­Oriented Computing promotes building applications by consuming reusable services. However, facing the selection of adequate services for a specific application still is a major challenge. Even with a reduced set of candidate services, the assessment effort could be overwhelming. On a previous work we have presented a novel approach to assist developers on discovery, selection and integration of services. This paper presents the selection method, which is based on a comprehensive scheme for services' interfaces compatibility. The scheme allows developers to gain knowledge on likely services' interactions and their required adaptations to achieve a positive integration. The scheme is also complemented by a framework based on black­box testing to verify compatibility on the expected behavior of a candidate service. The usefulness of the selection method is highlighted through a series of case studies.Sociedad Argentina de Informática e Investigación Operativ

An Evaluation on Developer’s Acceptance of EasySOC : A Development Model for Service-Oriented Computing

Different development methods have been proposed for enabling the construction of software with the Service-Oriented Computing (SOC) paradigm . Service-oriented applications invoke services that developers must first discover, engage, and in time potentially replace with newer versions or even alternative services from differentproviders. Hence, the widely agreed development methodology involves three main activities, including service discovery, service incorporation into applications, and service replacement. EasySOC is a very recent approach for developing service-oriented applications that decreases the costs of building this kind of applications, by simplifyingdiscovery, integration and replacement of services. This paper reports some experiments evidencing the effort needed to start producing service –oriented applications with EasySOC. Result s show that users non experienced in SOC development perceive that EasySOC is convenient and easy to adopt.Sociedad Argentina de Informática e Investigación Operativ

Avoiding WSDL Bad Practices in Code-First Web Services

Service-Oriented Computing allows software developers to structure applications as a set of standalone and reusable components called services. The common technological choice for materializing these services is Web Services, whose exposed functionality is described by using the Web Services Description Language (WSDL). Methodologically, Web Services are often built by first implementing their behavior and then generating the corresponding WSDL document via automatic tools. Good WSDL designs are crucial to derive reusable Web Services. We found that there is a high correlation between well-known Object-Oriented metrics taken in the code implementing services and the occurrences of bad design practices in their WSDL documents. This paper shows that some refactorings performed early when developing Web Services can greatly improve the quality of generated WSDL documents.Sociedad Argentina de Informática e Investigación Operativ