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JWire Concepts

JWire Concepts. Components play roles in one or more interaction protocols. Roles are named and typed. Components are Java objects. AComposite. foo : Foo. bar : Bar. out : Requirement<Input>. in : Input. Systems are created by instantiating components and “wiring” their roles together.

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JWire Concepts

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  1. JWire Concepts Components play roles in one or more interaction protocols. Roles are named and typed. Components are Java objects. AComposite foo : Foo bar : Bar out : Requirement<Input> in : Input Systems are created by instantiating components and “wiring” their roles together. New component types can be defined as compositions of existing components.

  2. Meta-level Descriptors Descriptors are per instance not per class (c.f. Java Beans)

  3. Composition “Recipes” • To place components, ALAN run-time must know their resource requirements. • How? • Add this information to the descriptors • Create descriptors first: • Descriptors encapsulate how to create components and bind them • Act as “recipes” for a configuration

  4. What For? • Automatic creation of distributed app’s • User’s applications generates recipes • E.g. for searching, purchasing, negotiating, etc. • Pass recipe to ALAN services • ALAN deploys components in optimal locations around network • Mobile agents “done right” • Concurrency, distribution, efficiency

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