HistoryService (camunda BPM Javadocs 7.1.10-ee)

All Known Implementing Classes:

HistoryServiceImpl
```
public interface HistoryService
```
Service exposing information about ongoing and past process instances. This is different from the runtime information in the sense that this runtime information only contains the actual runtime state at any given moment and it is optimized for runtime process execution performance. The history information is optimized for easy querying and remains permanent in the persistent storage.

Author:

Christian Stettler, Tom Baeyens, Joram Barrez

Method Summary

Methods
Modifier and Type	Method and Description
`HistoricActivityInstanceQuery`	`createHistoricActivityInstanceQuery()` Creates a new programmatic query to search for `HistoricActivityInstance`s.
`HistoricActivityStatisticsQuery`	`createHistoricActivityStatisticsQuery(String processDefinitionId)` Query for the number of historic activity instances aggregated by activities of a single process definition.
`HistoricDetailQuery`	`createHistoricDetailQuery()` Creates a new programmatic query to search for `HistoricDetail`s.
`HistoricIncidentQuery`	`createHistoricIncidentQuery()` Creates a new programmatic query to search for `historic incidents`.
`HistoricProcessInstanceQuery`	`createHistoricProcessInstanceQuery()` Creates a new programmatic query to search for `HistoricProcessInstance`s.
`HistoricTaskInstanceQuery`	`createHistoricTaskInstanceQuery()` Creates a new programmatic query to search for `HistoricTaskInstance`s.
`HistoricVariableInstanceQuery`	`createHistoricVariableInstanceQuery()` Creates a new programmatic query to search for `HistoricVariableInstance`s.
`NativeHistoricActivityInstanceQuery`	`createNativeHistoricActivityInstanceQuery()` creates a native query to search for `HistoricActivityInstance`s via SQL
`NativeHistoricProcessInstanceQuery`	`createNativeHistoricProcessInstanceQuery()` creates a native query to search for `HistoricProcessInstance`s via SQL
`NativeHistoricTaskInstanceQuery`	`createNativeHistoricTaskInstanceQuery()` creates a native query to search for `HistoricTaskInstance`s via SQL
`UserOperationLogQuery`	`createUserOperationLogQuery()` Creates a new programmatic query to search for `UserOperationLogEntry` instances.
`void`	`deleteHistoricProcessInstance(String processInstanceId)` Deletes historic process instance.
`void`	`deleteHistoricTaskInstance(String taskId)` Deletes historic task instance.

- Method Detail
  - createHistoricProcessInstanceQuery
```
HistoricProcessInstanceQuery createHistoricProcessInstanceQuery()
```
    Creates a new programmatic query to search for HistoricProcessInstances.
  - createHistoricActivityInstanceQuery
```
HistoricActivityInstanceQuery createHistoricActivityInstanceQuery()
```
    Creates a new programmatic query to search for HistoricActivityInstances.
  - createHistoricActivityStatisticsQuery
```
HistoricActivityStatisticsQuery createHistoricActivityStatisticsQuery(String processDefinitionId)
```
    Query for the number of historic activity instances aggregated by activities of a single process definition.
  - createHistoricTaskInstanceQuery
```
HistoricTaskInstanceQuery createHistoricTaskInstanceQuery()
```
    Creates a new programmatic query to search for HistoricTaskInstances.
  - createHistoricDetailQuery
```
HistoricDetailQuery createHistoricDetailQuery()
```
    Creates a new programmatic query to search for HistoricDetails.
  - createHistoricVariableInstanceQuery
```
HistoricVariableInstanceQuery createHistoricVariableInstanceQuery()
```
    Creates a new programmatic query to search for HistoricVariableInstances.
  - createUserOperationLogQuery
```
UserOperationLogQuery createUserOperationLogQuery()
```
    Creates a new programmatic query to search for UserOperationLogEntry instances.
  - createHistoricIncidentQuery
```
HistoricIncidentQuery createHistoricIncidentQuery()
```
    Creates a new programmatic query to search for historic incidents.
  - deleteHistoricTaskInstance
```
void deleteHistoricTaskInstance(String taskId)
```
    Deletes historic task instance. This might be useful for tasks that are dynamically created and then completed. If the historic task instance doesn't exist, no exception is thrown and the method returns normal.
  - deleteHistoricProcessInstance
```
void deleteHistoricProcessInstance(String processInstanceId)
```
    Deletes historic process instance. All historic activities, historic task and historic details (variable updates, form properties) are deleted as well.
  - createNativeHistoricProcessInstanceQuery
```
NativeHistoricProcessInstanceQuery createNativeHistoricProcessInstanceQuery()
```
    creates a native query to search for HistoricProcessInstances via SQL
  - createNativeHistoricTaskInstanceQuery
```
NativeHistoricTaskInstanceQuery createNativeHistoricTaskInstanceQuery()
```
    creates a native query to search for HistoricTaskInstances via SQL
  - createNativeHistoricActivityInstanceQuery
```
NativeHistoricActivityInstanceQuery createNativeHistoricActivityInstanceQuery()
```
    creates a native query to search for HistoricActivityInstances via SQL

Interface HistoryService

Method Summary

Method Detail

createHistoricProcessInstanceQuery

createHistoricActivityInstanceQuery

createHistoricActivityStatisticsQuery

createHistoricTaskInstanceQuery

createHistoricDetailQuery

createHistoricVariableInstanceQuery

createUserOperationLogQuery

createHistoricIncidentQuery

deleteHistoricTaskInstance

deleteHistoricProcessInstance

createNativeHistoricProcessInstanceQuery

createNativeHistoricTaskInstanceQuery

createNativeHistoricActivityInstanceQuery