2.2.1 Application Objects  2 Proposed Architecture  2.1 The Message Bus RESPONDEO - A Lightweight Application Server    RESPONDEO is a lightweight application server for managing BES wrapped in application objects. It provides an object-oriented framework for specialized communication and application protocols which facilitates the connection of various legacy BES to the WWW. RESPONDEO is lightweight in the sense that it is small in code size, it offers well-defined interfaces for interaction and communication via the message bus, and it provides stateless application objects only. It manages application objects in a generic way: it does not need to know anything about the application-specific behaviour and implementation of each BES. The abstraction from these BES-specific details offers management functionalities at a higher level of abstraction and in an uniformly accessible manner. Within the proposed system architecture, RESPONDEO forms the object-oriented framework-based middle tier which is implemented in Java JDK 2.     2.2.1 Application Objects  2.2.2 Application Management Functionalities       2.2.1 Application Objects  2 Proposed Architecture  2.1 The Message Bus  Thu Dec 9 14:08:00 GMT+1 1999