Trigger Message Event Subscription

Deliver a message to a specific execution to trigger an existing message event subscription. Inject process variables as the message’s payload.

Method

POST /execution/{id}/messageSubscriptions/{messageName}/trigger

Parameters

Path Parameters

Name Description
id The id of the execution to submit the message to.
messageName The name of the message that the addressed subscription corresponds to.

Request Body

A JSON object with the following properties:

Name Description
variables A JSON object containing variable key-value pairs. Each key is a variable name and each value a JSON variable value object.

Name Description
value The variable's value. For variables of type Object, the serialized value has to be submitted as a String value.

For variables of type File the value has to be submitted as Base64 encoded string.

type The value type of the variable.
valueInfo A JSON object containing additional, value-type-dependent properties.

For serialized variables of type Object, the following properties can be provided:

  • objectTypeName: A string representation of the object's type name.
  • serializationDataFormat: The serialization format used to store the variable.

For serialized variables of type File, the following properties can be provided:

  • filename: The name of the file. This is not the variable name but the name that will be used when downloading the file again.
  • mimetype: The mime type of the file that is being uploaded.
  • encoding: The encoding of the file that is being uploaded.

Result

This method returns no content.

Response Codes

Code Media type Description
204 Request successful.
400 application/json The variable value or type is invalid, for example if the value could not be parsed to an Integer value or the passed variable type is not supported. See the Introduction for the error response format.
500 application/json The addressed execution has no pending message subscriptions for the given message. See the Introduction for the error response format.

Example

Request

POST /execution/anExecutionId/messageSubscriptions/someMessage/trigger

Request Body:

{"variables" :
    {"aVariable" : {"value" : true, "type": "Boolean"},
     "anotherVariable" : {"value" : 42, "type": "Integer"}}
}

Response

Status 204. No content.

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