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| This page is under construction- You are welcome to help and complete it |
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The SCA specifications 1collectively define many terms that are used throughout the Tuscany SCA implementation, for example, SCADomain, Composite, Component, Service, Reference. Tuscany itself uses a few terms that are worth explaining.
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| Component Instance |
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| Component Instance |
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| Component Instance |
The running component that services requests. A single component definition in a SCDL file may give rise to one or more component instances depending on how the component is scoped (using the @Scope annotation).
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| Distributed Domain |
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| Distributed Domain |
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| Distributed Domain |
An SCA Domain that is "distributed over a series of interconnected runtime nodes".
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| Domain Node |
The part of a Distributed Domain that represent the components that will run on a Node.
Provides an environment inside which SCA component instances execute. It's an operating system process, separate from other Nodes. Its form may be as simple as a single Java VM or it may take the more scalable and reliable form, such as a compute cluster.
Each node must be capable of supporting at least:
- one implementation type
- one binding type (which may be restricted to binding.sca)
A node must be able to expose the service endpoints required by the components it runs. It must be able to support the client technology for the references of associated components.
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| Node Runtime? |
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| Node Runtime? |
The Tuscany framework that runs Component Instances for components in a Node Domain
A runtime groups together one or more (distributed) nodes. It describes the compute resources that will run the components of an SCA Domain.
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| Config File |
XML file that is used to set up a DAS instance. It defines how DAS will treat the data when converting it from the data source to the SDO Data Graph or vice-versa.
References
1 http://www.osoa.org/display/Main/Service+Component+Architecture+Specifications
