TrActorS: a transactional actor system for distributed query processing

A transaction management model for distributed information systems that utilizes actor-like objects (TrActor) which deviate from conventional actors in their objects types, messages types, and mail queue is described. The objects are used in conjunction with distributed blackboarding techniques for addressing the process of reasoning about the need for cooperation and negotiation between the disparate information sources in a distributed information network. A variant of the nested transaction model is proposed as an information processing framework for the management model. A language for this framework is also proposed, and the feasibility of this approach is demonstrated by means of a comprehensive example