WaitHook (copper-coreengine 5.4.1 API)

All Known Implementing Classes:

AbstractWaitHook
```
public interface WaitHook
```
Callback interface used by COPPER to enable execution of custom code in the context of a workflow instance' wait invocation.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`onWait(Workflow<?> wf, java.sql.Connection con)`	Called for one single wait invocation of the corresponding workflow instance.

- Method Detail
  - onWait
```
void onWait(Workflow<?> wf,
            java.sql.Connection con)
     throws java.lang.Exception
```
    Called for one single wait invocation of the corresponding workflow instance. This method may be called multiple times, e.g. in case of a rollback with subsequent retry. Attention! You may not commit or rollback the transaction currently hold by the specified connection (if not null). This will be done by COPPER. You may just use this to hook custom code into the transaction context.
    
    Parameters:
    
    wf - Workflow instance
    
    con - DB connection or null, in case there is no DB connection in the scope
    
    Throws:
    
    java.lang.Exception - Any exception which can happen inside of the code of this WaitHook.