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Get External Tasks (POST)

Queries for external tasks that fulfill given parameters in the form of a JSON object. This method is slightly more powerful than the Get External Tasks method because it allows to specify a hierarchical result sorting.

Method

POST /external-task

Parameters

Query Parameters

Name	Description
firstResult	Pagination of results. Specifies the index of the first result to return.
maxResults	Pagination of results. Specifies the maximum number of results to return. Will return less results if there are no more results left.

Request Body

A JSON object with the following properties:

Name Description

externalTaskId Filter by an external task's id.

topicName Filter by an external task topic.

workerId Filter by the id of the worker that the task was most recently locked by.

locked Only include external tasks that are currently locked (i.e., they have a lock time and it has not expired). Value may only be true, as false matches any external task.

notLocked Only include external tasks that are currently not locked (i.e., they have no lock or it has expired). Value may only be true, as false matches any external task.

withRetriesLeft Only include external tasks that have a positive (> 0) number of retries (or null). Value may only be true, as false matches any external task.

noRetriesLeft Only include external tasks that have 0 retries. Value may only be true, as false matches any external task.

lockExpirationAfter Restrict to external tasks that have a lock that expires after a given date. By default*, the date must have the format yyyy-MM-dd'T'HH:mm:ss.SSSZ, e.g., 2013-01-23T14:42:45.000+0200.

lockExpirationBefore Restrict to external tasks that have a lock that expires before a given date. By default*, the date must have the format yyyy-MM-dd'T'HH:mm:ss.SSSZ, e.g., 2013-01-23T14:42:45.000+0200.

activityId Filter by the id of the activity that an external task is created for.

activityIdIn Filter by the comma-separated list of ids of the activities that an external task is created for.

executionId Filter by the id of the execution that an external task belongs to.

processInstanceId Filter by the id of the process instance that an external task belongs to.

processDefinitionId Filter by the id of the process definition that an external task belongs to.

tenantIdIn Filter by a comma-separated list of tenant ids. An external task must have one of the given tenant ids.

active Only include active tasks. Value may only be true, as false matches any external task.

suspended Only include suspended tasks. Value may only be true, as false matches any external task.

priorityHigherThanOrEquals Only include jobs with a priority higher than or equal to the given value. Value must be a valid long value.

priorityLowerThanOrEquals Only include jobs with a priority lower than or equal to the given value. Value must be a valid long value.

sorting

A JSON array of criteria to sort the result by. Each element of the array is a JSON object that specifies one ordering. The position in the array identifies the rank of an ordering, i.e., whether it is primary, secondary, etc. The ordering objects have the following properties:

sortBy	Mandatory. Sort the results lexicographically by a given criterion. Valid values are `id`, `lockExpirationTime`, `processInstanceId`, `processDefinitionId`, `processDefinitionKey`, `taskPriority` and `tenantId`.
sortOrder	Mandatory. Sort the results in a given order. Values may be `asc` for ascending order or `desc` for descending order.

* For further information, please see the documentation.

Result

A JSON array of external task objects. Each external task object has the following properties:

Name	Value	Description
activityId	String	The id of the activity that this external task belongs to.
activityInstanceId	String	The id of the activity instance that the external task belongs to.
errorMessage	String	The full error message submitted with the latest reported failure executing this task; `null` if no failure was reported previously or if no error message was submitted
errorDetails	String	The error details submitted with the latest reported failure executing this task. `null` if no failure was reported previously or if no error details was submitted
executionId	String	The id of the execution that the external task belongs to.
id	String	The id of the external task.
lockExpirationTime	String	The date that the task's most recent lock expires or has expired.
processDefinitionId	String	The id of the process definition the external task is defined in.
processDefinitionKey	String	The key of the process definition the external task is defined in.
processInstanceId	String	The id of the process instance the external task belongs to.
tenantId	String	The id of the tenant the external task belongs to.
retries	Number	The number of retries the task currently has left.
suspended	Boolean	A flag indicating whether the external task is suspended or not.
workerId	String	The id of the worker that posesses or posessed the most recent lock.
topicName	String	The topic name of the external task.
priority	Number	The priority of the external task.
businessKey	String	The business key of the process instance the external task belongs to.

Response Codes

Code	Media type	Description
200	application/json	Request successful.
400	application/json	Returned if some of the query parameters are invalid, for example if a `sortOrder` parameter is supplied, but no `sortBy`. See the Introduction for the error response format.

Example

Request

POST /external-task

Request Body:

{
  "processDefinitionId":"aProcessDefinitionId",
  "sorting":
      [{"sortBy": "processDefinitionKey",
      "sortOrder": "asc"
      },
      {"sortBy": "lockExpirationTime",
      "sortOrder": "desc"
      }]
}

Response

Status 200.

[{
  "activityId": "anActivityId",
  "activityInstanceId": "anActivityInstanceId",
  "errorMessage": "anErrorMessage",
  "errorDetails": "anErrorDetails",
  "executionId": "anExecutionId",
  "id": "anExternalTaskId",
  "lockExpirationTime": "2015-10-06T16:34:42.000+0200",
  "processDefinitionId": "aProcessDefinitionId",
  "processDefinitionKey": "aProcessDefinitionKey",
  "processInstanceId": "aProcessInstanceId",
  "tenantId": null,
  "retries": 3,
  "suspended": false,
  "workerId": "aWorkerId",
  "topicName": "aTopic",
  "priority": 9,
  "businessKey": "aBusinessKey"
},
{
  "activityId": "anotherActivityId",
  "activityInstanceId": "anotherActivityInstanceId",
  "errorMessage": "anotherErrorMessage",
  "errorDetails": "anotherErrorDetails",
  "executionId": "anotherExecutionId",
  "id": "anotherExternalTaskId",
  "lockExpirationTime": "2015-10-06T16:34:42.000+0200",
  "processDefinitionId": "aProcessDefinitionId",
  "processDefinitionKey": "anotherProcessDefinitionKey",
  "processInstanceId": "anotherProcessInstanceId",
  "tenantId": null,
  "retries": 1,
  "suspended": false,
  "workerId": "aWorkerId",
  "topicName": "aTopic",
  "priority": 3,
  "businessKey": "aBusinessKey"
}]

Options