rforms all of our transaction management.  See <a class="xref" href="txnexample_java.html#dbwriter" title="DBWriter.java">DBWriter.java</a> for
                implementation details.
            </p>
          </li>
          <li>
            <p>
                <code class="literal">PayloadData.java</code>
            </p>
            <p>
                This is a data class used to encapsulate several data
                fields. It is fairly uninteresting, except that the usage
                of a clas