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GET
/
history
/
variable-instance
/
{id}
Get Variable Instance
curl --request GET \
  --url http://{host}:{port}/{contextPath}/history/variable-instance/{id} \
  --header 'Authorization: Basic <encoded-value>'
{
  "id": "someId",
  "name": "amount",
  "type": "Integer",
  "value": 5,
  "valueInfo": {},
  "processDefinitionKey": "aProcessDefinitionKey",
  "processDefinitionId": "aProcessDefinitionId",
  "processInstanceId": "aProcessInstanceId",
  "executionId": "aExecutionId",
  "activityInstanceId": "Task_1:b68b71ca-e310-11e2-beb0-f0def1557726",
  "caseDefinitionKey": null,
  "caseDefinitionId": null,
  "caseInstanceId": null,
  "caseExecutionId": null,
  "taskId": null,
  "tenantId": null,
  "errorMessage": null,
  "state": "CREATED",
  "createTime": "2017-02-10T14:33:19.000+0200",
  "removalTime": "2018-02-10T14:33:19.000+0200",
  "rootProcessInstanceId": "aRootProcessInstanceId"
}

Authorizations

​
Authorization
string
header
required

Basic authentication header of the form Basic <encoded-value>, where <encoded-value> is the base64-encoded string username:password.

Path Parameters

​
id
string
required

The id of the variable instance.

Query Parameters

​
deserializeValues
boolean

Determines whether serializable variable values (typically variables that store custom Java objects) should be deserialized on server side (default true).

If set to true, a serializable variable will be deserialized on server side and transformed to JSON using Jackson's POJO/bean property introspection feature. Note that this requires the Java classes of the variable value to be on the REST API's classpath.

If set to false, a serializable variable will be returned in its serialized format. For example, a variable that is serialized as XML will be returned as a JSON string containing XML.

Note: While true is the default value for reasons of backward compatibility, we recommend setting this parameter to false when developing web applications that are independent of the Java process applications deployed to the engine.

Response

Request successful.

​
id
string | null

The id of the variable instance.

​
name
string | null

The name of the variable instance.

​
processDefinitionKey
string | null

The key of the process definition the variable instance belongs to.

​
processDefinitionId
string | null

The id of the process definition the variable instance belongs to.

​
processInstanceId
string | null

The process instance id the variable instance belongs to.

​
executionId
string | null

The execution id the variable instance belongs to.

​
activityInstanceId
string | null

The id of the activity instance in which the variable is valid.

​
caseDefinitionKey
string | null

The key of the case definition the variable instance belongs to.

​
caseDefinitionId
string | null

The id of the case definition the variable instance belongs to.

​
caseInstanceId
string | null

The case instance id the variable instance belongs to.

​
caseExecutionId
string | null

The case execution id the variable instance belongs to.

​
taskId
string | null

The id of the task the variable instance belongs to.

​
tenantId
string | null

The id of the tenant that this variable instance belongs to.

​
errorMessage
string | null

An error message in case a Java Serialized Object could not be de-serialized.

​
state
string | null

The current state of the variable. Can be 'CREATED' or 'DELETED'.

​
createTime
string<date-time> | null

The time the variable was inserted. Default format yyyy-MM-dd'T'HH:mm:ss.SSSZ.

​
removalTime
string<date-time> | null

The time after which the variable should be removed by the History Cleanup job. Default format yyyy-MM-dd'T'HH:mm:ss.SSSZ.

​
rootProcessInstanceId
string | null

The process instance id of the root process instance that initiated the process containing this variable.

​
value
any

Can be any value - string, number, boolean, array or object. Note: Not every endpoint supports every type.

​
type
string | null

The value type of the variable.

​
valueInfo
object

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. (Not applicable for decision-definition, /process-instance/variables-async, and /migration/executeAsync endpoints)