tosca_definitions_version: tosca_simple_yaml_1_0

description: >
  Queue subsystem, which is service template with topology_template,
  act as a nested system inside another system and also act as stand
  alone service template.

imports:
  - definitions.yaml

topology_template:
  description: Template of a database including its hosting stack.

  inputs:
    server_ip:
      type: string
      description: IP address of the message queuing server to receive messages from.
      default: 127.0.0.1
    server_port:
      type: integer
      description: Port to be used for receiving messages.
      default: 8080
    my_cpus:
      type: integer
      description: Number of CPUs for the server.
      default: 2
      constraints:
        - valid_values: [ 1, 2, 4, 8 ]

  substitution_mappings:
    node_type: example.QueuingSubsystem
    # capabilities:
    #  message_receiver: [ app, message_receiver ]
    requirements:
      receiver1: [ tran_app, receiver1 ]
      receiver2: [ tran_app, receiver2 ]

  node_templates:
    tran_app:
      type: example.QueuingSubsystem
      properties:
        server_ip: { get_input: server_ip }
        server_port: { get_input: server_port }
      requirements:
        - host:
            node: server

    server:
      type: tosca.nodes.Compute
      capabilities:
        host:
          properties:
            disk_size: 10 GB
            num_cpus: { get_input: my_cpus }
            mem_size: 4096 MB
        os:
          properties:
            architecture: x86_64
            type: Linux
            distribution: Ubuntu
            version: 14.04

  outputs:
    receiver_ip:
      description: private IP address of the message receiver application
      value: { get_attribute: [ server, private_address ] }
# It seems current _process_intrisic_function can not handle more than 2 arguments, save it for later
#    receiver_port:
#      description: Port of the message receiver endpoint
#      value: { get_attribute: [ app, data_endpoint, port_name ] }

  groups:
    tran_server_group:
      members: [ tran_app, server ]
      type: tosca.groups.Root