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serviceOrchestration IDD (simple strategy)

generic_mqtt & generic_mqtts

Overview

This page describes the generic_mqtt and generic_mqtts service interface of serviceOrchestration, which provides runtime (late) binding between application systems.

Hereby the Interface Design Description (IDD) is provided to the serviceOrchestration – Service Description. For further details about how this service is meant to be used, please consult that document.

Interface Description

pull

The service operation request requires an MQTTRequestTemplate JSON encoded message in which the authentication is a proper identity info and the payload is a ServiceOrchestrationRequest. 

Topic: arrowhead/serviceorchestration/orchestration/pull

{
   "traceId": "<trace-id>",
   "authentication": "<authentication-data>",
   "responseTopic": "<response-topic>",
   "qosRequirement": <0|1|2>,
   "payload": {
      "serviceRequirement": {
         "serviceDefinition": "kelvinInfo",
         "preferredProviders": []
      },
      "orchestrationFlags": {
         "MATCHMAKING": "true",         
         "ONLY_PREFERRED": "false"
      }
   }
}

The service operation responds with an MQTTResponseTemplate JSON encoded message in which the status code is 200 if called successfully. The response template payload is a ServiceOrchestrationResponse.

{
   "status": 200,
   "traceId": "<trace-id>",
   "receiver": "TempConsumer",
   "payload": {
      "results": [
         {
            "serviceInstanceId": "TemperatureProvider2|kelvinInfo|1.0.0",
            "providerName": "TemperatureProvider2",
            "serviceDefinitition": "kelvinInfo",
            "version": "1.0.0",
            "cloudIdentitifer": "LOCAL"

         }
      ],
      "warnings": []
   }
}

The error codes are 400 if the request is malformed, 401 if the requester authentication was unsuccessful, 403 if the authenticated requester has no permission and 500 if an unexpected error happens. In these cases the response template payload is an ErrorResponse JSON.

{
   "status": 400,
   "traceId": "<trace-id>",
   "receiver": "TempConsumer",
   "payload": {
      "errorMessage": "The specified service definition name does not match the naming convention: exampleservicename",
      "errorCode": 400,
      "exceptionType": "INVALID_PARAMETER",
      "origin": "arrowhead/serviceorchestration/orchestration/pull"
   }
}

subscribe

The service operation request requires an MQTTRequestTemplate JSON encoded message in which the authentication is a proper identity info and the payload is a ServiceOrchestrationSubscriptionRequest. Optionally a trigger parameter can be provided with a Boolean value which if true, then the orchestration process also will be executed.

Topic: arrowhead/serviceorchestration/orchestration/subscribe

{
   "traceId": "<trace-id>",
   "authentication": "<authentication-data>",
   "responseTopic": "<response-topic>",
   "qosRequirement": <0|1|2>,
   "params": {
      "trigger": true
   },
   "payload": {
      "orchestrationRequest": {
         "serviceRequirement": {
            "serviceDefinition": "kelvinInfo",
            "preferredProviders": []
         },
         "orchestrationFlags": {
            "MATCHMAKING": "true",
            "ONLY_PREFERRED": "false"
         }
      },
      "notifyInterface": {
         "protocol": "mqtt",
         "properties": {
            "topic":"arrowhead/orchestration-push"
         }
      },
      "duration": 100000
   }
}

The service operation responds with an MQTTResponseTemplate JSON encoded message in which the status code is 200 if called successfully. The response template payload is a UUID.

{
   "status": 200,
   "traceId": "<trace-id>",
   "receiver": "TempConsumer",
   "payload": "d4d61873-07db-4e93-a16e-9465852bdabf"
}

The error codes are 400 if the request is malformed, 401 if the requester authentication was unsuccessful, 403 if the authenticated requester has no permission and 500 if an unexpected error happens. In these cases the response template payload is an ErrorResponse JSON.

{
   "status": 400,
   "traceId": "<trace-id>",
   "receiver": "TempConsumer",
   "payload": {
      "errorMessage": "Unsupported notify protocol: CoAP",
      "errorCode": 400,
      "exceptionType": "INVALID_PARAMETER",
      "origin": "arrowhead/serviceorchestration/orchestration/subscribe"
   }
}

unsubscribe

The service operation request requires an MQTTRequestTemplate JSON encoded message in which the authentication is a proper identity info and the payload is a UUID.

Topic: arrowhead/serviceorchestration/orchestration/unsubscribe

{
   "traceId": "<trace-id>",
   "authentication": "<authentication-data>",
   "responseTopic": "<response-topic>",
   "qosRequirement": "<0|1|2>",
   "payload": "d4d61873-07db-4e93-a16e-9465852bdabf"
}

The service operation responds with an MQTTResponseTemplate JSON encoded message in which the status code is 200 if called successfully and an existing subscription was removed and 204 if no matching record was found. 

{
  "status": <status-code>,
  "traceId": "<trace-id>",
  "receiver": "TempConsumer",
  "payload": ""
}

The error codes are 400 if the request is malformed, 401 if the requester authentication was unsuccessful, 403 if the authenticated requester has no permission and 500 if an unexpected error happens. In these cases the response template payload is an ErrorResponse JSON.

{
   "status": 400,
   "traceId": "<trace-id>",
   "receiver": "TempConsumer",
   "payload": {
      "errorMessage": "Invalid subscription id",
      "errorCode": 400,
      "exceptionType": "INVALID_PARAMETER",
      "origin": "arrowhead/serviceorchestration/orchestration/unsubscribe"
   }
}