XSERVICES NOTIFICATION BUS: AWEB SERVICES NOTIFICATION IMPLEMENTATION

摘要

As the rapid development of the large scale internet applications, there are demands for collaboration on heterogeneous resources over dispersed location services especially in the area of grid computing. The resource results in the requirement of acquiring itself state in a proper manner when it is created, modified and destroyed. Meanwhile, the change of the large scale distributed system also requires more message exchange patterns in the services. WS-Notification (WSN) specification satisfies these corresponding demands in distributed system with the feature of anonymous interaction, asynchronous, loosely coupled and multi-communication. This paper implements Xser-vices Notification Bus (XNB) which proposes an adaptive infrastructure of topic-based web services notification mechanism for subscription management and notification dissemination according to the WSN specification. The infrastructure is composed of a notification subscription component, a notification consumption component, a resource container and a notification management console. The core functionality of notification mechanism includes three independent processes which are topic publication, topic subscription and notification dissemination. These functionalities are handled through well defined processes by sets of operations on the topic management and subscription management through the resource container. In addition, we apply XNB to sensor network as a use scenario to demonstrate the usage of publish/subscribe notification.