Txqos: Concept, Scenario, and Framework *

We have proposed the TxQoS (Transactional Quality of Service) approach to infuse transactional semantics into contracts so that a gap between business and technical communities with regard to transaction awareness is filled. In this paper we continue to refine the proposed TxQoS concepts in SOA (Service Oriented Architecture) context. We illustrate the complete TxQoS picture by a scenario with three parties interacting through the four phases of a TxQoS lifecycle. The specification of the four TxQoS attributes is discussed in detail to demonstrate how the TxQoS concepts are operationalized. To support the TxQoS scenario, we present a framework containing an architecture, a mapping and matching model and a monitoring mechanism. With in-depth investigation of various aspects of the TxQoS framework, we aim to deliver a proactive approach of transaction management that is feasible, extensible and effective to enhance process and service reliability.