lass="programlisting">    private Database myDb = null;
    private Environment myEnv = null;
    private EntryBinding dataBinding = null;
    private Random generator = new Random();


    private static final int MAX_RETRY = 20;

    private static String[] keys = {"key 1", "key 2", "key 3",
                                    "key 4", "key 5", "key 6",
                                    "key 7", "key 8", "key 9",
                                    "key 10"}; </pre>
        <p>
        Next we implement