brooklyn.catalog:
  id: netcat-example
  version: "1.0"
  item:
    type: org.apache.brooklyn.entity.software.base.VanillaSoftwareProcess
    name: Simple Netcat Server

    launch.command: |
      echo $MESSAGE | nc -l $NETCAT_PORT &
      echo $! > $PID_FILE
        
    env:
      MESSAGE: $brooklyn:config("message")
      NETCAT_PORT: $brooklyn:attributeWhenReady("netcat.port")
      
    brooklyn.parameters:
    - name: message
      description: a message to send to the caller
      default: hello
    - name: netcat.port
      type: port
      description: the port netcat should run on
      default: 4321+

    brooklyn.enrichers:
    - type: org.apache.brooklyn.enricher.stock.Transformer
      brooklyn.config:
        uniqueTag: main-uri-generator
        enricher.sourceSensor: $brooklyn:sensor("host.address")
        enricher.targetSensor: $brooklyn:sensor("main.uri")
        enricher.targetValue:
          $brooklyn:formatString:
          - "http://%s:%s/"
          - $brooklyn:attributeWhenReady("host.address")
          - $brooklyn:attributeWhenReady("netcat.port")