| The Internet has evolved in ways that were unbelievable fifteen years ago. Beyond the traditional information exposure techniques, web services are seen as a solid direction to validating the realization of ubiquitous computing. This new, rapid emergence of web services has given way to innovative thinking surrounding the historical methods. Web services are challenged with a new step in evolution: composition and transaction management of web services. Current models of transaction management software are not suited to web services due to deeply seated and detailed mechanisms for assured delivery of data and traditional ACID (atomicity, consistency, isolation, durability) properties. Software that consumes web services does not give accepted ACID properties or two-phased commit models for recovery from errors. Currently there are few models for web services transaction support and among those, each has a customized middleware solution to manage the web services employed in a specific case. There are numerous specification approaches to the current problem, but this proposed framework that employs a transaction manager, incorporates a universally unique identifier generator, and utilizes a scalable transaction tracker component creates composite web services of unrelated character. This framework creates a transaction system enabling a relaxed transactional operation. By creating the framework as web services objects, this enables mobile environments to realize synchronous and asynchronous transactional aspects to composite web services applications. Using standards of SOAP and XML, this thesis and potential demonstration will focus on the transactional model framework and future research. |
