All Known Implementing Classes:

HistoricExternalTaskLogEntity
```
public interface HistoricExternalTaskLog
```
The HistoricExternalTaskLog is used to have a log containing information about task execution. The log provides details about the last lifecycle state of a task:
An instance of HistoricExternalTaskLog represents the latest historic state in the lifecycle of a task.

Since:

7.7

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`String`	`getActivityId()`	Returns the id of the activity which the external task associated with.
`String`	`getActivityInstanceId()`	Returns the id of the activity instance on which the associated external task was created.
`String`	`getErrorMessage()`	Returns the message of the error that occurred by executing the associated external task.
`String`	`getExecutionId()`	Returns the specific execution id on which the associated external task was created.
`String`	`getExternalTaskId()`	Returns the id of the associated external task.
`String`	`getId()`	Returns the unique identifier for `this` historic external task log.
`long`	`getPriority()`	Returns the priority of the associated external task when `this` log entry was created.
`String`	`getProcessDefinitionId()`	Returns the specific process definition id on which the associated external task was created.
`String`	`getProcessDefinitionKey()`	Returns the specific process definition key on which the associated external task was created.
`String`	`getProcessInstanceId()`	Returns the specific process instance id on which the associated external task was created.
`Date`	`getRemovalTime()`	The time the historic external task log will be removed.
`Integer`	`getRetries()`	Returns the retries of the associated external task before the associated external task has been executed and when `this` log occurred.
`String`	`getRootProcessInstanceId()`	Returns the specific root process instance id of the process instance on which the associated external task was created.
`String`	`getTenantId()`	Returns the id of the tenant this external task log entry belongs to.
`Date`	`getTimestamp()`	Returns the time when `this` log occurred.
`String`	`getTopicName()`	Returns the topic name of the associated external task.
`String`	`getWorkerId()`	Returns the id of the worker that fetched the external task most recently.
`boolean`	`isCreationLog()`	Returns `true` when `this` log represents the creation of the associated external task.
`boolean`	`isDeletionLog()`	Returns `true` when `this` log represents the deletion of the associated external task.
`boolean`	`isFailureLog()`	Returns `true` when `this` log represents the failed execution of the associated external task.
`boolean`	`isSuccessLog()`	Returns `true` when `this` log represents the successful execution of the associated external task.

- Method Detail
  - getId
```
String getId()
```
    Returns the unique identifier for this historic external task log.
  - getTimestamp
```
Date getTimestamp()
```
    Returns the time when this log occurred.
  - getExternalTaskId
```
String getExternalTaskId()
```
    Returns the id of the associated external task.
  - getRetries
```
Integer getRetries()
```
    Returns the retries of the associated external task before the associated external task has been executed and when this log occurred.
  - getPriority
```
long getPriority()
```
    Returns the priority of the associated external task when this log entry was created.
  - getTopicName
```
String getTopicName()
```
    Returns the topic name of the associated external task.
  - getWorkerId
```
String getWorkerId()
```
    Returns the id of the worker that fetched the external task most recently.
  - getErrorMessage
```
String getErrorMessage()
```
    Returns the message of the error that occurred by executing the associated external task. To get the full error details, use HistoryService.getHistoricExternalTaskLogErrorDetails(String)
  - getActivityId
```
String getActivityId()
```
    Returns the id of the activity which the external task associated with.
  - getActivityInstanceId
```
String getActivityInstanceId()
```
    Returns the id of the activity instance on which the associated external task was created.
  - getExecutionId
```
String getExecutionId()
```
    Returns the specific execution id on which the associated external task was created.
  - getRootProcessInstanceId
```
String getRootProcessInstanceId()
```
    Returns the specific root process instance id of the process instance on which the associated external task was created.
  - getProcessInstanceId
```
String getProcessInstanceId()
```
    Returns the specific process instance id on which the associated external task was created.
  - getProcessDefinitionId
```
String getProcessDefinitionId()
```
    Returns the specific process definition id on which the associated external task was created.
  - getProcessDefinitionKey
```
String getProcessDefinitionKey()
```
    Returns the specific process definition key on which the associated external task was created.
  - getTenantId
```
String getTenantId()
```
    Returns the id of the tenant this external task log entry belongs to. Can be null if the external task log entry belongs to no single tenant.
  - isCreationLog
```
boolean isCreationLog()
```
    Returns true when this log represents the creation of the associated external task.
  - isFailureLog
```
boolean isFailureLog()
```
    Returns true when this log represents the failed execution of the associated external task.
  - isSuccessLog
```
boolean isSuccessLog()
```
    Returns true when this log represents the successful execution of the associated external task.
  - isDeletionLog
```
boolean isDeletionLog()
```
    Returns true when this log represents the deletion of the associated external task.
  - getRemovalTime
```
Date getRemovalTime()
```
    The time the historic external task log will be removed.

Interface HistoricExternalTaskLog

Method Summary

Method Detail

getId

getTimestamp

getExternalTaskId

getRetries

getPriority

getTopicName

getWorkerId

getErrorMessage

getActivityId

getActivityInstanceId

getExecutionId

getRootProcessInstanceId

getProcessInstanceId

getProcessDefinitionId

getProcessDefinitionKey

getTenantId

isCreationLog

isFailureLog

isSuccessLog

isDeletionLog

getRemovalTime