Nonblocking Scheduling for Web Service Transactions

For improved flexibility and concurrent usage existing transaction management models for Web services relax the isolation property of Web service-based transactions. Correctness of the concurrent execution then has to be ensured by commit order-preserving transaction schedulers. However, local schedulers of service providers typically do take into account neither time constraints for committing the whole transaction, nor the individual services' constraints when scheduling decisions are made. This often leads to an unnecessary blocking of transactions by (possibly long-running) others. In this paper, we propose a novel nonblocking scheduling mechanism that is used prior to the actual service invocations. Its aim is to reach an agreement between the client and all participating providers on what transaction processing times have to be expected, accepted, and guaranteed. This enables service consumers to find a set of best suited providers fitting their deadlines. Service providers...

• Type: Conference
• Year: 2007
• Where: ECOWS
• Authors: Mohammad Alrifai, Wolf-Tilo Balke, Peter Dolog, Wolfgang Nejdl
• Keywords: ECOWS 2007, Order-preserving Transaction Schedulers, Service Providers, Usage Existing Transaction