"PayloadData.java">PayloadData.java</a>) for storage in
    the database.  The random number generator that we instantiate is used
    to generate unique data for storage in the database.  The
    <code class="literal">MAX_RETRY</code> variable is used to define how many times
    we will retry a transaction in the face of a deadlock. And, finally,
    <code class="literal">keys</code> is a <code class="classname">String</code> array that
    holds the keys used for our database entries.
</p>
        <pre c