SynchronizationCallbackTarget (Hibernate Javadocs)

All Known Implementing Classes:

JtaTransactionCoordinatorImpl
```
public interface SynchronizationCallbackTarget
```
Defines "inflow" for JTA transactions from the perspective of Hibernate's registered JTA Synchronization back into the TransactionCoordinator by means of the SynchronizationCallbackCoordinator.
That's a mouthful :) The way it works is like this...
- Hibernate will register a JTA Synchronization implementation (RegisteredSynchronization) which allows it to listen for completion of the JTA transaction.
- That RegisteredSynchronization is given a SynchronizationCallbackCoordinator which it uses to route the transaction completion calls back into Hibernate. The SynchronizationCallbackCoordinator contract applies various behaviors around this process. See the impls for details.
- The SynchronizationCallbackCoordinator is handed a SynchronizationCallbackTarget which is the specific means for it to "route the transaction completion calls back into Hibernate". The SynchronizationCallbackTarget is most often the TransactionCoordinator impl or a direct delegate of the TransactionCoordinator impl. In that sense, SynchronizationCallbackTarget is the contract between the SynchronizationCallbackCoordinator and the TransactionCoordinator.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`afterCompletion(boolean successful, boolean delayed)`	Callback of after-completion.
`void`	`beforeCompletion()`	Callback of before-completion.
`boolean`	`isActive()`	Is the callback target still active? Generally this is checked by the caller prior to calling `beforeCompletion()` or `afterCompletion(boolean, boolean)`

- Method Detail
  - isActive
```
boolean isActive()
```
    Is the callback target still active? Generally this is checked by the caller prior to calling beforeCompletion() or afterCompletion(boolean, boolean)
    
    Returns:
    
    true indicates the target is active; false indicates it is not.
  - beforeCompletion
```
void beforeCompletion()
```
    Callback of before-completion.
    
    See Also:
    
    Synchronization.beforeCompletion()
  - afterCompletion
```
void afterCompletion(boolean successful,
                     boolean delayed)
```
    Callback of after-completion.
    
    Parameters:
    
    successful - Was the transaction successful?
    
    See Also:
    
    Synchronization.afterCompletion(int)