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CHAMELEON framework

Dipartimento di Informatica
UniversitÓ degli Studi dell'Aquila

Via Vetoio, I-67010 L'Aquila (Italy)

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The widespread usage of small computing devices and the introduction of new communication infrastructures are rapidly changing the ways we use and interact with technology to perform everyday tasks.

Today's networking infrastructures are typically made of mobile resource-constrained devices, characterized by their heterogeneity and limitedness. Ubiquitous networking, makes it possible for mobile users to access networked software services across heterogeneous infrastructures through resource-constrained devices. Mobility, inducing changes to the execution and network environments (and therefore changes to the availability of resources), demands for adaptable applications capable of coping with resource scarcity and with the inherently faulty and heterogeneous nature of such environments.

CHAMELEON is a declarative framework for tailoring adaptable Java applications for resource-constrained devices and can be used for tackling a form of adaptation to the execution context.

CHAMELEON, whose foundations are presented in [Inverardi04], [WOSP07], is based on a static analysis approach to the inspection of Java programs and their characterization w.r.t. their resource consumption in a given execution environment. Explicitly targeting resource-constrained devices, we implemented and instantiated all the needed machinery on the Java platform (although other platforms are eligible) due to its widespread availability on today's mobile devices (e.g., smart phones, PDAs, etc.).

The approach uses a light extension of the Java language (i.e., the CHAMELEON Programming Model), a Resource Model, and an SLS Model that constitute the basis for a declarative technique that can be used for supporting the development, Over-The-Air (OTA) delivering, and deployment of adaptable applications. By leveraging this approach we are able to perform a quantitative resource-oriented analysis of Java applications, further accounting for the user preferences specified through SLS model.

In particular, the Programming Model allows for easily specifying, in a flexible and declarative way, different adaptation alternatives (i.e., different implementations) for Java applications. The model is based on an agile and user-friendly extension of the Java language;

This project has been partially supported by the IST PLASTIC project that has been funded by the European Commission, FP6 contract number 026955, http://www.ist-plastic.org/. The goal of the PLASTIC project is the rapid and easy development/deployment of self-adapting services for B3G networks. In particular, the CHAMELEON framework has been exploited for supporting the PLASTIC service-oriented interaction pattern for provision and consumption of adaptive software services.

Paola ::©www.di.univaq.it/inverard
Marco ::©www.di.univaq.it/marco.autili
Paolo ::©www.di.univaq.it/paolo.dibenedetto
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