Libre software provides powerful applications ready to be integrated for the build-up of platforms for internal use in organisations. We describe the architecture of the collaborative work platform which we have integrated and designed for researchers at GET. We present the elements we have learned during this project in particular, with respect to contribution to external libre projects, in order to better ensure the maintainability of the internal applications, and to phpGroupware as a framework for specific applications development.

No abstract

Multimedia applications require support for quality of service (QoS). The need for reusable and maintainable code also means that these kinds of applications are developed in a distributed object system.To address the support of quality of service in middle- ware, we propose a lightweight model to manage the QoS constraints in this kind of environment. This model is based on two types of objects, micro QoS managers ( QoS-Mngr) and resource managers. A QoS-Mngr is associated to an application, it handles the QoS contract, the QoS mapping and the QoS monitoring. Each resource manager is responsible for QoS management for a specific resource, including, admission control, real-time scheduling and monitoring. The QoS-Mngrs and the resource managers (R-Mngr), co-operate, using the middleware, in order to ensure an end-to-end QoS management. This paper focuses on the resource manager, and gives an overview of our implementation on a CORBA platform in the context of a video on demand application.

Libre software provides powerful applications ready to be integrated for the build up of platforms for internal use in organisations. We describe the architecture of the collaborative work platform which we have integrated and designed for researchers at GET. We present the elements we have learned during this project in particular, with respect to contribution to external libre projects, in order to better ensure the maintainability of the internal applications, and to phpGroupware as a framework for specific applications development.

No abstract