Active XML Transactions
Debmalya Biswas, Il-Gon Kim · IGI Global eBooks · 2010
Active XML (AXML) provides an elegant platform to integrate the power of XML, Web services and Peer to Peer (P2P) paradigms by allowing (active) Web service calls to be embedded within XML documents. In this chapter, the authors present some interesting aspects encountered while investigating a transactional framework for AXML systems. They present an integrated locking protocol for the scenario where the structure of both data and transactions are nested. They show how to construct the undo operations dynamically, and outline an algorithm to compute a correct optimum undo order in the presence of nesting and parallelism. Finally, to overcome the inherent problem of peer disconnection, the authors propose an innovative solution based on ”chaining” the active peers for early detection and recovery from peer disconnection.