tosca_definitions_version: tosca_simple_yaml_1_0

description: Definition of the custom types of Micro TOSCA model

group_types:
  micro.groups.Root:
    derived_from: tosca.groups.Root

  # group type for partitioning the nodes of an applications over Team(s)
  micro.groups.Team:
    derived_from: micro.groups.Root
    members: [ micro.nodes.Root ]

  # group type for defining the Edge of an architecture
  micro.groups.Edge:
    derived_from: micro.groups.Root
    members: [ micro.nodes.Service, micro.nodes.CommunicationPattern ] # databases cannot be in edge

relationship_types:
  micro.relationships.Root:
    derived_from: tosca.relationships.Root

  # relationship type for modelling interactions
  micro.relationships.InteractsWith:
    derived_from: micro.relationships.Root
    valid_target_types: [ micro.nodes.Root ]
    properties:
      circuit_breaker: # is a circuit breaker used?
        type: boolean
        default: false
      dynamic_discovery:  # is the endpoint dynamically discovered (e.g., with a service discovery)
        type: boolean
        default: false
      timeout:  # is a timeout set?
        type: boolean
        default: false

node_types:
  micro.nodes.Root:
    derived_from: tosca.nodes.Root
    capabilities:
      feature:
        type: tosca.capabilities.Node
        valid_source_types: [ micro.nodes.Root ]
        occurrences: [ 0, UNBOUNDED ]

  # node type for representing services
  micro.nodes.Service:
    derived_from: micro.nodes.Root
    requirements:
      - interaction:
          capability: tosca.capabilities.Node
          occurrences: [ 0, UNBOUNDED ]
          node: micro.nodes.Root
          relationship: micro.relationships.InteractsWith

  # node type for representing communication patterns
  micro.nodes.CommunicationPattern:
    derived_from: micro.nodes.Root

  # node type for representing databases
  micro.nodes.Database:
    derived_from: micro.nodes.Root
    capabilities:
      feature:
        type: tosca.capabilities.Node
        valid_source_types: [ micro.nodes.Service ] # communication patterns cannot interact with databases
        occurrences: [ 0, UNBOUNDED ]

  #  Type of CommunicationPatterns
  micro.nodes.MessageBroker:
    derived_from: micro.nodes.CommunicationPattern

  micro.nodes.MessageRouter:
    derived_from: micro.nodes.CommunicationPattern
    requirements:
      - interaction:
          capability: tosca.capabilities.Node
          occurrences: [ 1, UNBOUNDED ] # at least one (outgoing) interaction
          node: micro.nodes.Root
          relationship: micro.relationships.InteractsWith