@Override
  public void afterCommit(TransactionEvent event) {
    invoked = true;
    try {
      afterCommit2(event);
    } catch (VirtualMachineError e) {
      SystemFailure.initiateFailure(e);
      throw e;
    } catch (Throwable t) {
      callbackError = t;
    }
  }
A <code>TransactionListener</code> used in testing. Its callback methods are implemented to throw
{@link UnsupportedOperationException} unless the user overrides the "2" methods.

@see #wasInvoked

@since GemFire 4.0
geode-core/src/distributedTest/java/org/apache/geode/cache30/TestTransactionListener.java