Building reliable services based mashups

Mashups represent a new wave for building Web 2.0 applications. A mashup is an application that presents content available from different sources by reusing the contents provided by third parties (e.g. Web pages, Web services). Although a mashup is usually built on the fly by users, we argue that there is a necessity for building reliable mashups by providing QoS properties to such kind of applications in an easy and intuitive way. This paper presents an approach for building secure and adaptable services based mashups using a contract model. Contracts can ensure properties at execution time in the presence of exceptions. Given a mashup, it is posible to associate secure and adaptability contracts. Furthermore, we propose an architecture to ensure QoS properties during the mashup execution which is being tested using WSO2 mashup server.