Modeling Dynamic Software Components with UML

UML provides modeling support for static software components through hierarchical packages. We describe a small extension of UML for modeling dynamic software components which can be instantiated at runtime, customized, made persistent, migrated and be aggregated to larger components. For example, this extension can be used to describe systems built with JavaBeans, ActiveX-Controls, Voyager Agents or CORBA Objects by Value. With our extension, the lifecycle of a dynamic software component can be expressed in terms of UML. We can not only describe a system at design time, but also monitor its runtime behaviour. A re-engineering tool is presented that exploits our UML extension for a high-level visualization of the interaction between dynamic components in an object-oriented system.

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