 stateful session bean instance that
 a transaction is about to be committed. The instance can use this
 method, for example, to write any cached data to a database.

 <p> This method executes in the proper transaction context.

 <p><b>Note:</b> The instance may still cause the container to
 rollback the transaction by invoking the <code>setRollbackOnly</code> method
 on the session context, or by throwing an exception.</div>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="../../ja