Repairing lost connections of mobile transactions with minimal XML data exchange

Abstract

Whenever applications running on mobile clients share XML data within a server-side database, some key requirements are optimized data exchange, transaction synchronization, and the correct treatment of lost connections during application execution. In order to reduce the costs for data exchange, it may be considerably advantageous when the client caches and reuses XML data of previous queries in comparison to delivering the same XML data from server to client repetitively. Furthermore, transactions synchronization has to provide not only the correct treatment of parallel updates, but has to also take into account lost connections. We present a solution for both problems, which combines an exchange of XML difference fragments with an optimized transaction synchronization technique for long transactions that is able to handle lost connections correctly. © 2005 by International Federation for Information Processing.