This paper describes a component model suitable for development of Enterprise Application IntegrationMiddleware in the industrial field. In this model, there are two types of subscription. In component level subscription, an interaction between components is defined by subscription to changes of component's attributes or to occurrences of spontaneous events. A connector object attached to a subscribed component manages these inter-component dependencies. This results in independency of a component and enables localized modifications when systems are modified or extended. In application level subscription, adaptor components map inter-component dependencies into inter-application dependencies. In this paper, our proposed middleware, DiaSynapse, has been developed based on this model, and applied to the development of wide-area monitoring systems and network management systems.

This paper proposes a page‐centric approach for developing Web applications in which an application is modeled as a state machine of a UML that takes into account the state of a Web page. Application variables are divided into page‐related variables and others. Business logics are also divided into presentation‐related logics and others. In this paper, based on our model, a Web application development environment is also described. Using this environment, we can intuitively define the behavior of a Web application. Examples of applications developed by our method are given. © 2009 Wiley Periodicals, Inc. Electron Comm Jpn, 92(7): 47–56, 2009; Published online in Wiley InterScience (http://www.interscience.wiley.com). DOI 10.1002/ecj.10039

SUMMARYThis paper proposes a page-centric approach for developing Web applications in which an application is modeled as a state machine of a UML that takes into account the state of a Web page. Application variables are divided into page-related variables and others. Business logics are also divided into presentation-related logics and others. In this paper, based on our model, a Web application development environment is also described. Using this environment, we can intuitively define the behavior of a Web application. Examples of applications developed by our method are given.