Web Services and Business Transactions
World Wide Web
Towards Accountable Enterprise Mashup Services
ICEBE '07 Proceedings of the IEEE International Conference on e-Business Engineering
Restful web services
Market Overview of Enterprise Mashup Tools
ICSOC '08 Proceedings of the 6th International Conference on Service-Oriented Computing
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On the Web, mashups have emerged as a promising approach to aggregate Web-based resources and services in an effortless way that allows for situational composition of software applications and in some cases even empowers end-users to do so. In this paper, we focus on commercial mashups as a means to implement customized service bundles in multi-level software service marketplaces and discuss problems that challenge reliable provision, aggregation and consumption of mashed-up services requiring payment. In particular, we propose a pragmatic method for service metering that considers the conflicting expectations from providers of mashed up services and consumers of service mashups in case of failures during REST-based service interactions over the Web. Our method builds on a relaxed version of the Try Confirm/Cancel protocol for transactional control. Our discussion builds on experiences gained in the COCKTAIL project that aims at a holistic platform for commercial service mashups. This platform provides the basis for a prototypical implementation of our metering approach.