apiVersion: core.oam.dev/v1beta1
kind: Application
metadata:
  name: tinygo-hello-world
  annotations:
    description: 'HTTP hello world demo in Golang (TinyGo), using the WebAssembly Component Model and WebAssembly Interfaces Types (WIT)'
    wasmcloud.dev/authors: wasmCloud team
    wasmcloud.dev/source-url: https://github.com/wasmCloud/wasmCloud/blob/main/examples/golang/components/http-hello-world/wadm.yaml
    wasmcloud.dev/readme-md-url: https://github.com/wasmCloud/wasmCloud/blob/main/examples/golang/components/http-hello-world/README.md
    wasmcloud.dev/homepage: https://github.com/wasmCloud/wasmCloud/tree/main/examples/golang/components/http-hello-world
    wasmcloud.dev/categories: |
      http,outgoing-http,http-server,tinygo,golang,example
spec:
  components:
    - name: echo
      type: component
      properties:
        # To use the locally compiled code in this folder, use the line below instead after running `wash build`:
        # image: file://./build/echo_messaging_s.wasm
        image: gitea.rebus.ninja/lore/go-nats-client:1.0.1
        id: echo
      traits:
        # Govern the spread/scheduling of the component
        - type: spreadscaler
          properties:
            instances: 1
        # Establish a unidirectional link to the messaging capability provider (powered by NATS),
        # so the `echo` component can make use of messaging interface functionality
        # (i.e. making interacting with the messaging system, in this case NATS)            
        - type: link
          properties:
            target: nats
            namespace: wasmcloud
            package: messaging
            interfaces: [consumer]

    # Add a capability provider that implements `wasmcloud:messaging` using NATS
    - name: nats
      type: capability
      properties:
        image: ghcr.io/wasmcloud/messaging-nats:0.23.1
        ## To configure OTEL integration for this provider specifically, uncomment the lines below
        # config:
        #   - name: otel
        #     properties:
        #       otel_exporter_otlp_endpoint: "http://all-in-one:4318"
        #       otel_exporter_otlp_traces_endpoint: "http://traces-backend/v1/traces"
        #       otel_exporter_otlp_metrics_endpoint: "http://metrics-backend/v1/metrics"
        #       otel_exporter_otlp_logs_endpoint: "http://logs-backend/v1/logs"
      traits:
        # Since the `nats` capability provider calls an component to handle messages 
        # coming over subscriptions, this provider needs a unidirectional link to the
        # component that wil be called.
        # 
        # Here we link the `nats` provider (the "source"), to the `echo` component (the "target"),
        # so that so the provider can deliver messages to the component (by invoking the wasmcloud:messaging/handler interface) .
        - type: link
          properties:
            target: echo
            namespace: wasmcloud
            package: messaging
            interfaces: [handler]
            source_config:
              - name: simple-subscription
                properties:
                  subscriptions: wasmcloud.echo