An Effective And Reliable Publish/Subscribe System Based On The WS-Notification

The Internet of Things (IoT) service is a kind of service which needs high real-time and wide-area distributed communication infrastructure as the underlying support. However, the existing enterprise service bus (ESB) cannot provide the guarantee of this feature. In addition, the request/response paradigm which traditional ESB provides cannot meet the needs of asynchronous interaction with plenty of events in the IoT service. Therefore, we developed a unified messaging space middleware based on the publish/subscribe paradigm. The middleware consists of two layers. The bottom is distributed event bus for wide area network, and the upper is the local interface layer providing interfaces to different IoT services. We focus on the interface layer and propose a series of measures to build.a high-performance interface service.Publish/subscribe paradigm is widely used in distributed environment for its characteristics of asynchronous, multicast communication, loose coupling and ease of extension. In the IoT environment, this paper analyzes the problems and shortcomings of existing works about publish/subscribe system, and proposes improvement measures for topic organization forms, metadata storage and management, the adaptability of the complex network environment, the improvement of the overall system performance and stability and so on. At the same time, this paper analyzes and compares the performance of the system before and after improvement. It aims to solve a series of problems encountered in the practical.process of the publish/subscribe system, and provides a high performance publish/subscribe system interface service which can be used in complex network environment.