Package com.fasterxml.uuid

Examples of com.fasterxml.uuid.UUIDTimer


    public void testSecureRandomUUIDTimerConstructor() throws IOException
    {
        // try passing a null SecureRandom argument
        try
        {
            /*UUIDTimer uuid_timer =*/ new UUIDTimer((SecureRandom)null, null);
            // if we reach here we didn't catch what we should have
            fail("Expected exception not caught");
        }
        catch (NullPointerException ex)
        {
            // caught the expected exception, this is good, just go on
        }
        catch (Exception ex)
        {
            fail("Unexpected exception caught");
        }
       
        // now construct a valid case
        SecureRandom secure_random = new SecureRandom();
        UUIDTimer uuid_timer = new UUIDTimer(secure_random, null);
       
        // we'll do a simple run to see that it at least produces output
        byte[] test_array = new byte[UUID_TIMER_ARRAY_LENGTH];
        uuid_timer.getAndSetTimestamp(test_array);
        // check that it's not all null
        assertArrayNotEqual(test_array,
                            new byte[UUID_TIMER_ARRAY_LENGTH],
                            UUID_TIMER_ARRAY_LENGTH);
    }   
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        // constant for use in this test
        final int EXTRA_DATA_LENGTH = 9;
       
        // construct a UUIDTimer
        SecureRandom secure_random = new SecureRandom();
        UUIDTimer uuid_timer = new UUIDTimer(secure_random, null);
       
        // test an array thats too small
        try
        {
            byte[] test_array = new byte[UUID_TIMER_ARRAY_LENGTH - 1];
            uuid_timer.getAndSetTimestamp(test_array);
            // if we get here, we didn't catch the expected exception
            fail("Expected exception not caught");
        }
        catch (ArrayIndexOutOfBoundsException ex)
        {
            // caught the expected exception, this is good, just go on
        }
        catch (Exception ex)
        {
            fail("Unexpected exception caught");
        }
       
        // construct a valid array exactly big enough and see that it works
        byte[] test_array = new byte[UUID_TIMER_ARRAY_LENGTH];
        uuid_timer.getAndSetTimestamp(test_array);
        // check that it's not all null
        assertArrayNotEqual(test_array,
                            new byte[UUID_TIMER_ARRAY_LENGTH],
                            UUID_TIMER_ARRAY_LENGTH);
       
        // construct a valid array bigger then we need
        // and make sure getAndSetTimeStamp only touches the begining part
        test_array = new byte[UUID_TIMER_ARRAY_LENGTH + EXTRA_DATA_LENGTH];
        Arrays.fill(test_array, (byte)'x');
        uuid_timer.getAndSetTimestamp(test_array);
        for (int i = 0; i < EXTRA_DATA_LENGTH; ++i)
        {
            assertEquals("test_array element was corrupted",
                        (byte)'x',
                        test_array[i + UUID_TIMER_ARRAY_LENGTH]);
        }
        // check that the timer portion is not all null
        assertArrayNotEqual(test_array,
                            new byte[UUID_TIMER_ARRAY_LENGTH],
                            UUID_TIMER_ARRAY_LENGTH);
       
        // now make a bunch of timer elements and validate that they are
        // are well behaved timer elements
        byte[][] array_of_uuid_timer_byte_arrays =
            new byte[SIZE_OF_TEST_ARRAY][UUID_TIMER_ARRAY_LENGTH];
       
        // before generating all the uuid timer arrays, get the start time
        long start_time = System.currentTimeMillis();
       
        // now create the array of uuid timer output arrays
        for (int i = 0; i < array_of_uuid_timer_byte_arrays.length; i++)
        {
            uuid_timer.getAndSetTimestamp(array_of_uuid_timer_byte_arrays[i]);
        }
       
        // now capture the end time
        long end_time = System.currentTimeMillis();
       
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