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Add new service to system capabilities


Actors Software Developer, Service Deployer
Dependencies Define Interaction, Run Service Anywhere
Notes Deployment of service to multiple sites/capability containers; Users can register services and service metadata; Users can schedule service execution, consuming a defined input stream and providing a defined output stream.
Version 1.1
Last Updated Jun 23, 2010

Scenario for "Define New Service" Use Case

  1. A new service is conceived to provide a capability in the system
    1. This can be a transformation from one information representation to another, or providing access to the capabilities of an (external) resource, or providing a basic system capability (such as a data store service).
    2. A service may require the existence of another service in the system
  2. An interaction pattern protocol is selected or defined for the input and output interfaces of the service, according to the service's functional capabilities.
    1. A service interacts exclusively through the exchange (send, receive) of messages
  3. The business logic for the service is implemented to meet the desired service functions, and satisfy the selected interaction protocols.
  4. An agent for the service is implemented or configured matching the specific service functions.
    1. A service is a resource and has a service (resource) agent. The service agent is responsible for the starting and stopping the service, monitoring its correct operation, and for advertising the service capabilities
  5. The developer of the service adds it to the list of available services in the Service Registry (using a Service Registration form or API).
  6. To deploy or execute the service on a specific execution node within a Capability Container, the service is added to the process list for a specific supervisor process (see Put Service Anywhere).
    1. A service instance can be executed continuously (as a deamon), or scheduled for temporary execution when needed. One or many worker processes may be collaborating in concert to provide the service of a service (instance in terms of the service definition). The caller of a service does not notice these deployment details.


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