By Anne-Françoise Le Meur, Charles Consel, Benoît Escrig (auth.), Judith Bishop (eds.)

Deployment is the act of taking parts and readying them for efficient use. there's steps following deployment, similar to set up or m- agement comparable features, yet all judgements approximately find out how to con?gure and c- pose/assemble an element are made on the deployment degree. this can be as a result the only chance within the software program lifecycle to bridge the distance among what the part developer couldn’t find out about the deployment atmosphere and what the environment’s developer couldn’t find out about the open set of depl- capable parts. it isn't amazing that deployment as a devoted step profits significance whilst addressing problems with system-wide traits, similar to dealing with restricted assets or getting ready for part model and method evolution. but, part deployment remains to be a self-discipline in its infancy: it grew to become mainstream perform in basic terms within the mid Nineteen Nineties. a lot of the easiest perform impulse originated in items like Microsoft’s Transaction Server and its method of attribute-based programming and later items like firm JavaBeans and now the Corba part version. these types of tackle the speci?c wishes of company appli- tion servers. despite the fact that, the opportunity of the deployment notion is going a long way past this. Deployment can and will contact e?ectively all actually component-based options. The court cases of part Deployment 2002 signify a great cro- component to the gamut of deployment concerns. From customization to handle - resource constraints to recon?guration of deployed structures and from structure to layout to languages, the avid reader will ?nd a few contribution.

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Extra resources for Component Deployment: IFIP/ACM Working Conference, CD 2002 Berlin, Germany, June 20–21, 2002 Proceedings

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Deployment agents [5]) that uses its own set of facilities, provided separately from the application’s implementation infrastructure, thereby introducing additional overhead to the target host. For these reasons, these approaches are usually not applicable in an emerging class of light-weight, resource constrained, highly distributed, and mobile computational environments. In this paper, we propose an approach that attempts to overcome the shortcomings of previous work and address all four deployment problems discussed above.

5 Component Upgrade Prism and its integrated analysis capabilities provide assurance that the specified configuration of components and connectors is valid according to the architectural specification. , due to accidental coding errors) [12]. This section describes a run-time approach to supporting reliable upgrades of existing component versions [2,16] and reliable deployment of new components, addressing problems 2 and 4 stated in the Introduction. , granularity, implementation language, and interaction paradigm), while enhancing its functionality (by adding new features) and/or reliability (by fixing known bugs).

In support of this two-level architecture, Prism currently distinguishes among three types of messages. ApplicationData messages are used by application-level components to communicate during execution. , during deployment). We have extensively used special-purpose components, called Admin Components, whose task is to exchange ComponentContent messages and facilitate the deployment and mobility of application-level components across devices. Another meta-level component is the Continuous Analysis component, which leverages ArchitecturalModel messages for analyzing the (partial) architectural models during the application’s execution, assessing the validity of proposed run-time architectural changes, and possibly disallowing the changes.

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