public ServerVMClientUserTransaction(TransactionManager tm) 
{
      this.tm = tm;
}

 public  void begin() throws SystemException, NotSupportedException 
{
      tm.begin();
      for (Iterator i = listeners.iterator(); i.hasNext(); )
      {
         ((UserTransactionStartedListener)i.next()).userTransactionStarted();
      } // end of for ()
}

 public  void commit() throws SystemException, SecurityException, RollbackException, IllegalStateException, HeuristicRollbackException, HeuristicMixedException 
{
      tm.commit();
}

 public static ServerVMClientUserTransaction getSingleton() 
{
               
      return singleton;
}

Return a reference to the singleton instance.

 public int getStatus() throws SystemException 
{
      return tm.getStatus();
}

 public  void registerTxStartedListener(ServerVMClientUserTransaction.UserTransactionStartedListener txStartedListener) 
{
      listeners.add(txStartedListener);
}

 public  void rollback() throws SystemException, SecurityException, IllegalStateException 
{
      tm.rollback();
}

 public  void setRollbackOnly() throws SystemException, IllegalStateException 
{
      tm.setRollbackOnly();
}

 public  void setTransactionTimeout(int seconds) throws SystemException 
{
      tm.setTransactionTimeout(seconds);
}

 public  void unregisterTxStartedListener(ServerVMClientUserTransaction.UserTransactionStartedListener txStartedListener) 
{
      listeners.remove(txStartedListener);
}