BeforeRequestChangesProvider (pro.taskana:taskana-core 6.3.2 API)

```
public interface BeforeRequestChangesProvider
```
The BeforeRequestChangesProvider allows to implement customized behaviour before changes have been requested on a given Task.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Task`	`beforeRequestChanges(Task task)`	Perform any action before changes have been requested on a Task through TaskService.requestChanges(String) or TaskService.forceRequestChanges(String).
`void`	`initialize(TaskanaEngine taskanaEngine)`	Provide the active TaskanaEngine which is initialized for this TASKANA installation.

- Method Detail
  - initialize
```
void initialize(TaskanaEngine taskanaEngine)
```
    Provide the active TaskanaEngine which is initialized for this TASKANA installation.
    This method is called during TASKANA startup and allows the service provider to store the active TaskanaEngine for later usage.
    
    Parameters:
    
    taskanaEngine - the active TaskanaEngine which is initialized for this installation
  - beforeRequestChanges
```
Task beforeRequestChanges(Task task)
                   throws Exception
```
    Perform any action before changes have been requested on a Task through TaskService.requestChanges(String) or TaskService.forceRequestChanges(String).
    This SPI is executed within the same transaction staple as TaskService.requestChanges(String).
    This SPI is executed with the same UserPrincipal and GroupPrincipal as in TaskService.requestChanges(String).
    
    Parameters:
    
    task - the Task before TaskService.requestChanges(String) or TaskService.forceRequestChanges(String) has started
    
    Returns:
    
    the modified Task. IMPORTANT: persistent changes to the Task have to be managed by the service provider
    
    Throws:
    
    Exception - if the service provider throws any exception