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model-based cross-layer monitoring and adaptation of multilayer systems

Science China(Information Sciences) 2013年第8期56卷 6-20页

作者： SONG Hui RAJ Amit HAJEBI Saeed CLARKE Aidan CLARKE Siobhn Lero:The Irish Software engineering Research Centre School of Computer Science and Statistics Trinity College Dublin Dublin 2 Ireland IBM Software Ireland Laboratory

With the vision of "Internet as a computer", complex software-intensive systems running on the Internet, or the "Internetwares", can be also divided into multiple layers. Each layer has a different focus, implementation technique, and stakeholders. Monitoring and adaptation of such multilayer systems are challenging, because the mismatches and adaptations are interrelated across the layers. This interrelation makes it difficult to find out: 1) When a system change causes mismatches in one layer, how to identify all the cascaded mismatches on the other layers? 2) When an adaptation is performed at one layer, how to find out all the complementary adaptations required in other layers? This paper presents a model-based approach towards cross-layer monitoring and adaptation of multilayer systems. We provide standard meta-modelling languages for system experts to specify the concepts and constraints separately for each layer, as well as the relations among the concepts from different layers. Within each individual layer, we use run-time models to represent the system state specific to this layer, monitor the systems by evaluating model changes according to specified constraints, and support manual or semi-automated adaption by modifying the models. When a change happens in the run-time model for one layer, either caused by system changes or by the adaptation, we synchronize the models for other layers to identify cascaded mismatches and complementary adaptations across the layers. We illustrate the approach on a simulated crisis management system, and are using it on a number of ongoing projects.

关键词： multilayer systems monitoring dynamic adaptation model driven engineering bidirectional model transformation

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Creation of a Meta-model for the Generation of a Webmapping Application

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Journal of Geographic Information System 2021年第4期13卷 452-465页

作者： Paul Franck Hery Antenaina Aimé Richard Hajalalaina Hasina Rakotonirainy Reziky Zafimarina School of Management and Technological Innovation University of Fianarantsoa Fianarantsoa Madagascar Laboratory of Computer Science and Mathematics Applied to Development University of Fianarantsoa Fianarantsoa Madagascar Computer Science Geomatics Mathematics and Application University of Fianarantsoa Fianarantsoa Madagascar University of Antananarivo Antananarivo Madagascar

Our research focuses on creating a meta-model for generating a web mapping application. It was difficult for non-geomatics developers to implement a webmapping application. Indeed, this type of application uses geospatial data that require geomatics skills. For this reason, in order to help non-geomatics developers to set up a webmapping application, we have designed a meta-model that automatically generates a webmapping application using model-driven engineering. The created meta-model is used by non-geomatics developers to explicitly write the concrete syntax specific to the webmapping application using the xtext tool. This concrete syntax is automatically converted into source code using the xtend tool without the intervention of the non-geomatics developers.

关键词： Webmapping model driven engineering model driven Architecture Meta-model WebGis GIS

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