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policy_types:

  aria.Plugin:
    _extensions:
      normative: true
      shorthand_name: Plugin
      type_qualified_name: aria:Plugin
      role: plugin
    description: >-
      Policy used to specify plugins used by services. For an operation to be able to use a plugin
      it must have a matching policy. The name of the policy must be the name of the plugin. The
      optional properties can be used to further specify plugin selection by the orchestrator.
    derived_from: tosca.policies.Root
    properties:
      version:
        description: >-
          Minimum plugin version.
        type: version
        required: false
      enabled:
        description: >-
          If the policy is to disable the plugin then it will be ignored and all operations and
          workflows depending on it will also be disabled.
        type: boolean
        default: true

  aria.Workflow:
    _extensions:
      normative: true
      shorthand_name: Workflow
      type_qualified_name: aria:Workflow
      role: workflow
    description: >-
      Policy used to specify custom workflows. A workflow is usually a workload of interconnected
      calls to operations on nodes and relationships in the service topology. The name of the policy
      is used as the name of the workflow. Note that it can be the same name as one of the normative
      lifecycle workflows ("install", "uninstall", etc.), in which case it would be considered an
      override of the default behavior. If the workflow requires parameters then this base type
      should be inherited and extended with additional properties.
    derived_from: tosca.policies.Root
    properties:
      implementation:
        description: >-
          The interpretation of the implementation string depends on the orchestrator. In ARIA it is
          the full path to a Python @workflow function that generates a task graph based on the
          service topology.
        type: string

  aria.Scaling:
    _extensions:
      normative: true
      type_qualified_name: aria:Scaling
      role: scaling
    description: >-
      Scaling.
    derived_from: tosca.policies.Scaling
    properties:
      min_instances:
        description: >-
          This property is used to indicate the minimum number of instances that should be created
          for the associated TOSCA Node Template by a TOSCA orchestrator.
        type: integer
        default: 1
        constraints:
          - greater_or_equal: 0
      max_instances:
        description: >-
          This property is used to indicate the maximum number of instances that should be created
          for the associated TOSCA Node Template by a TOSCA orchestrator.
        type: integer
        default: 1
        constraints:
          - greater_or_equal: 0
      default_instances:
        description: >-
          An optional property that indicates the requested default number of instances that should
          be the starting number of instances a TOSCA orchestrator should attempt to allocate. Note:
          The value for this property MUST be in the range between the values set for
          "min_instances" and "max_instances" properties.
        type: integer
        constraints:
          - greater_or_equal: 0
        required: false
    targets:
      - tosca.nodes.Root