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Contract Discovery Functional Profile
The Semantic Infrastructure provides the behavioral semantics required for dynamic composibility of services or generation of distributed queries. This includes runtime contract discovery.
From inherited abstract Artifact Functional Profile
An artifact is a managed resource within Contract Discovery has architectural implications on the Semantic Infrastructure: .
An artifact is associated with Policies define conditions of use and optionally contracts representing agreement on policies and other conditions. This requires the following capabilities:
- descriptions to enable the contract modules artifact to be visible, where the description includes a unique identifier for the contract artifact and a sufficient, and preferably a machine processible, representation of the meaning of terms used to describe the contractartifact, its functions, and its effects;
- one or more discovery mechanisms that enable searching for contracts artifacts that best meet the search criteria specified by the service participant; where the discovery mechanism will have access to the individual contract artifact descriptions, possibly through some repository mechanism;
- accessible storage of contract artifacts and contract artifact descriptions, so service participants can access, examine, and use the contracts artifacts as defined.
Descriptions include references to metrics which describe the operational characteristics of the subjects being described. This requires the following capabilities:
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From inherited abstract Discovery Functional Profile
Discovery is the set of capabilities which enable searching for artifacts that best meet the search criteria specified by the service participant.
Aspects of discovery include:
- Search for services, policies, and other artifact descriptions accessible via some repository mechanism
- Search for operational characteristics of artifacts, which are metrics defined in artifact descriptions. The information is accessible via infrastructure monitoring capabilties or directly from services.
- Tracking and notification mechanisms related to artifact usage, service availability, operational conformance
Capabilities associated with discovery are delineated in the functional profiles inherited, and specialized, by the discovery profile, namely:
- Artifact
- Metrics
- Interoperability
From inherited abstract Interoperability Functional Profile
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Descriptions provide up-to-date information on what a resource is, the conditions for interacting with the resource, and the results of such interactions. As such, the description is the source of vital information in establishing willingness to interact with a resource, reachability to make interaction possible, and compliance with relevant conditions of use. This requires the existence of
Architectural implications of interoperability on the Semantic Infrastructure are reflected in the following capabilities:
- one or more discovery mechanisms that enable searching for described resources that best meet the criteria specified by a service participant, where the discovery mechanism will have access to individual descriptions, possibly through some repository mechanism;
- tools to appropriately track users of the descriptions and notify them when a new version of the description is available.
From inherited abstract Metrics Functional Profile
Artifact Descriptions include references to metrics which describe the operational characteristics of the subjects being described
Architectural implications of metrics on the Semantic Infrastructure are reflected in the following capabilities:
- access to platform infrastructure monitoring and reporting capabilities
- access to metrics information generated or accessible by related services
- mechanisms to catalog and enable discovery of which metrics are available for a described artifact and information on how these metrics can be accessed;
- mechanisms to catalog and enable discovery of compliance records associated with policies, contracts, and constraints that are based on these metrics.
Capability Elaborations
This Functional Profile includes, but is not limited to, the following capability elaborations:
- complianceDiscovery
- contractDiscovery
- discovery
- identity
- interoperabilityDiscovery
- metadata
- metrics
- metricsDiscovery
- monitor
- serviceChangeNotification
- store
Derived From Requirements
- Semantic Infrastructure Requirements::caGRID 2.0 Platform and Terminology Integration::Service Orchestration and Choreography Service orchestration and choreography allows both application developers and non-developers to discover service "building blocks" that can be composed dynamically to provide business capabilities. Special cases include the orchestration of multiple services for a distributed query, or for a transactional workflow. Service orchestration and choreography will leverage static and behavioral semantics from the Semantic Infrastructure 2.0. The Semantic Infrastructure provides the behavioral semantics required for dynamic composibility of services or generation of distributed queries. This includes runtime contract discovery and negotiation to determine composibility of services based on service capabilities and constraints. Another use case is dynamic retrieval and enforcement of the policies that are in effect for a service interaction in the areas of logging, validations, data transformation, or routing. This information can be used either during the design of the orchestration or during the execution of the defined flow. Link to use case satisfied from caGRID 2.0 Roadmap: Federated query over the TCGA data and other data sets is performed using a service orchestration.
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Mechanisms to catalog and enable discovery of compliance records associated with policies, contracts, and constraints that are based on these metrics.
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The Semantic Infrastructure provides the behavioral semantics required for dynamic composibility of services or generation of distributed queries. This includes runtime contract discovery.
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- access to contract modules
- unique identification for each contract
- access to the metamodel defining terms used to describe the contract, its functions, and its effects;
- one or more discovery mechanisms that enable searching for contracts that best meet the search criteria specified by the service participant; where the discovery mechanism will have access to the individual contract descriptions, possibly through some repository mechanism;access
- tools to the infrastructure monitoring and reporting capabilities for SOA resources;
- access to metrics information generated or available from the related service mechanisms
- appropriately track users of the descriptions and notify them when a new version of the description is available.
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One or more discovery mechanisms that enable searching for artifacts that best meet the search criteria specified by the service participant; where the discovery mechanism will have access to the individual artifact descriptions, possibly through some repository mechanism.
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Descriptions which include a unique identifier for the artifact.
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One or more discovery mechanisms that enable searching for described resources that best meet the criteria specified by a service participant, where the discovery mechanism will have access to individual descriptions, possibly through some repository mechanism.
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A representation of the meaning of terms used to describe the artifact, its functions, and its effects.
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Access to metrics information generated or accessible by related services
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Mechanisms to catalog and enable discovery of which metrics are available for a described
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artifact and information on how these metrics can be accessed
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Access to platform infrastructure monitoring and reporting capabilities.
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Tools
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to appropriately track users of the descriptions and notify them when a new version of the description is available.
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Accessible storage of artifacts and artifact descriptions, so service participants can access, examine, and use the artifacts as defined.
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