Complete External Task

Completes an external task by id and updates process variables.

Method

POST /external-task/{id}/complete

Parameters

Path Parameters

Name Description
id The id of the task to complete.

Request Body

A JSON object with the following properties:

Name Description
workerId The id of the worker that completes the task. Must match the id of the worker who has most recently locked the task.
variables

A JSON object containing variable key-value pairs. Each key is a variable name and each value a JSON variable value object with the following properties:

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.

The following property can be provided for all value types:

  • transient: Indicates whether the variable should be transient or not. See documentation for more informations.

localVariables

A JSON object containing variable key-value pairs. Each key is a variable name and each value a JSON variable value object with the following properties:

Local variables are set only in the scope of external task.

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.

The following property can be provided for all value types:

  • transient: Indicates whether the variable should be transient or not. See documentation for more informations.

Result

This method returns no content.

Response Codes

Code Media type Description
204 Request successful.
400 application/json Returned if the task's most recent lock was not acquired by the provided worker. See the Introduction for the error response format.
404 application/json Returned if the task does not exist. This could indicate a wrong task id as well as a cancelled task, e.g., due to a caught BPMN boundary event. See the Introduction for the error response format.
500 application/json Returned if the corresponding process instance could not be resumed successfully. See the Introduction for the error response format.

Example

Request

POST /external-task/anId/complete

Request Body:

{
  "workerId": "aWorker",
  "variables":
      {"aVariable": {"value": "aStringValue"},
      "anotherVariable": {"value": 42},
      "aThirdVariable": {"value": true}},
  "localVariables":
      {"aLocalVariable": {"value": "aStringValue"}}
}

Response

Status 204. No content.

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