CREOLE: a Universal Language for Creating, Requesting, Updating and Deleting Resources

Details CREOLE: a Universal Language for Creating, Requesting, Updating and Deleting Resources CREOLE: a Universal Language for Creating, Requesting, Updating and Deleting Resources

2010-07-29

arxiv.org/abs/1007.5089v1

EPTCS 30, 2010, pp. 16-30

Computer Science

Programming Languages

In Proceedings FOCLASA 2010, arXiv:1007.4993

Scientific paper

10.4204/EPTCS.30.2

In the context of Service-Oriented Computing, applications can be developed following the REST (Representation State Transfer) architectural style. This style corresponds to a resource-oriented model, where resources are manipulated via CRUD (Create, Request, Update, Delete) interfaces. The diversity of CRUD languages due to the absence of a standard leads to composition problems related to adaptation, integration and coordination of services. To overcome these problems, we propose a pivot architecture built around a universal language to manipulate resources, called CREOLE, a CRUD Language for Resource Edition. In this architecture, scripts written in existing CRUD languages, like SQL, are compiled into Creole and then executed over different CRUD interfaces. After stating the requirements for a universal language for manipulating resources, we formally describe the language and informally motivate its definition with respect to the requirements. We then concretely show how the architecture solves adaptation, integration and coordination problems in the case of photo management in Flickr and Picasa, two well-known service-oriented applications. Finally, we propose a roadmap for future work.

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