Examples of org.apache.commons.net.ntp.TimeStamp

org.apache.commons.net.ntp.TimeStamp
TimeStamp class represents the Network Time Protocol (NTP) timestamp as defined in RFC-1305 and SNTP (RFC-2030). It is represented as a 64-bit unsigned fixed-point number in seconds relative to 0-hour on 1-January-1900. The 32-bit low-order bits are the fractional seconds whose precision is about 200 picoseconds. Assumes overflow date when date passes MAX_LONG and reverts back to 0 is 2036 and not 1900. Test for most significant bit: if MSB=0 then 2036 basis is used otherwise 1900 if MSB=1.
Methods exist to convert NTP timestamps to and from the equivalent Java date representation, which is the number of milliseconds since the standard base time known as "the epoch", namely January 1, 1970, 00:00:00 GMT.
@author Jason Mathews, MITRE Corp @version $Revision: 165675 $ $Date: 2005-05-02 15:09:55 -0500 (Mon, 02 May 2005) $ @see java.util.Date

        if (refName != null && refName.length() > 1) {
            refAddr += " (" + refName + ")";
        }
        System.out.println(" Reference Identifier:\t" + refAddr);


        TimeStamp refNtpTime = message.getReferenceTimeStamp();
        System.out.println(" Reference Timestamp:\t" + refNtpTime + "  " + refNtpTime.toDateString());


        // Originate Time is time request sent by client (t1)
        TimeStamp origNtpTime = message.getOriginateTimeStamp();
        System.out.println(" Originate Timestamp:\t" + origNtpTime + "  " + origNtpTime.toDateString());


        long destTime = info.getReturnTime();
        // Receive Time is time request received by server (t2)
        TimeStamp rcvNtpTime = message.getReceiveTimeStamp();
        System.out.println(" Receive Timestamp:\t" + rcvNtpTime + "  " + rcvNtpTime.toDateString());


        // Transmit time is time reply sent by server (t3)
        TimeStamp xmitNtpTime = message.getTransmitTimeStamp();
        System.out.println(" Transmit Timestamp:\t" + xmitNtpTime + "  " + xmitNtpTime.toDateString());


        // Destination time is time reply received by client (t4)
        TimeStamp destNtpTime = TimeStamp.getNtpTime(destTime);
        System.out.println(" Destination Timestamp:\t" + destNtpTime + "  " + destNtpTime.toDateString());


        info.computeDetails(); // compute offset/delay if not already done
        Long offsetValue = info.getOffset();
        Long delayValue = info.getDelay();
        String delay = (delayValue == null) ? "N/A" : delayValue.toString();

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        junit.textui.TestRunner.run(TimeStampTest.class);
    }


    public void testCompare() {


        TimeStamp ts1 = new TimeStamp(TIME1);  // Tue, Dec 17 2002 14:07:24.810 UTC
        TimeStamp ts2 = new TimeStamp(TIME1);
        TimeStamp ts3 = new TimeStamp(TIME2);   // Tue, Dec 17 2002 14:07:24.810 UTC
        TimeStamp ts4 = new TimeStamp(TIME3);   // Tue, Dec 17 2002 14:07:25.810 UTC


        // do assertion tests on TimeStamp class
        assertEquals("equals(1,2)", ts1, ts2);
        assertTrue("compareTo(1,2)", ts1.compareTo(ts2) == 0);
        assertEquals("ntpValue(1,2)", ts1.ntpValue(), ts2.ntpValue());
        assertEquals("hashCode(1,2)", ts1.hashCode(), ts2.hashCode());
        assertEquals("ts1==ts1", ts1, ts1);


  // timestamps in ts1 (TIME1) and ts3 (TIME2) are only off by the smallest
  // fraction of a second (~200 picoseconds) so the times are not equal but
  // when converted to Java dates (in milliseconds) they will be equal.
        assertTrue("ts1 != ts3", !ts1.equals(ts3));
        assertTrue("compareTo(1,3)", ts1.compareTo(ts3) == -1);
        assertEquals("seconds", ts1.getSeconds(), ts3.getSeconds());
        assertTrue("fraction", ts1.getFraction() != ts3.getFraction());
        assertTrue("ntpValue(1,3)", ts1.ntpValue() != ts3.ntpValue());
        assertTrue("hashCode(1,3)", ts1.hashCode() != ts3.hashCode());
        long time1 = ts1.getTime();
        long time3 = ts3.getTime();
        assertEquals("equals(time1,3)", time1, time3); // ntpTime1 != ntpTime3 but JavaTime(t1) == JavaTime(t3)...


        assertTrue("ts3 != ts4", !ts3.equals(ts4));
        assertTrue("time3 != ts4.time", time3 != ts4.getTime());
    }

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        assertTrue("ts3 != ts4", !ts3.equals(ts4));
        assertTrue("time3 != ts4.time", time3 != ts4.getTime());
    }


    public void testUTCString() {
        TimeStamp ts1 = new TimeStamp(TIME1);  // Tue, Dec 17 2002 14:07:24.810 UTC
  String actual = ts1.toUTCString();
  assertEquals("Tue, Dec 17 2002 14:07:24.810 UTC", actual);
    }

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    public void testDateConversion() {
  // convert current date to NtpTimeStamp then compare Java date
  // computed from NTP timestamp with original Java date.
  Calendar refCal = Calendar.getInstance(java.util.TimeZone.getTimeZone("UTC"));
  Date refDate = refCal.getTime();
  TimeStamp ts = new TimeStamp(refDate);
  assertEquals("refDate.getTime()", refDate.getTime(), ts.getTime());
  Date tsDate = ts.getDate();
  assertEquals(refDate, tsDate);
    }

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        if (refName != null && refName.length() > 1) {
            refAddr += " (" + refName + ")";
        }
        System.out.println(" Reference Identifier:\t" + refAddr);


        TimeStamp refNtpTime = message.getReferenceTimeStamp();
        System.out.println(" Reference Timestamp:\t" + refNtpTime + "  " + refNtpTime.toDateString());


        // Originate Time is time request sent by client (t1)
        TimeStamp origNtpTime = message.getOriginateTimeStamp();
        System.out.println(" Originate Timestamp:\t" + origNtpTime + "  " + origNtpTime.toDateString());


        long destTime = info.getReturnTime();
        // Receive Time is time request received by server (t2)
        TimeStamp rcvNtpTime = message.getReceiveTimeStamp();
        System.out.println(" Receive Timestamp:\t" + rcvNtpTime + "  " + rcvNtpTime.toDateString());


        // Transmit time is time reply sent by server (t3)
        TimeStamp xmitNtpTime = message.getTransmitTimeStamp();
        System.out.println(" Transmit Timestamp:\t" + xmitNtpTime + "  " + xmitNtpTime.toDateString());


        // Destination time is time reply received by client (t4)
        TimeStamp destNtpTime = TimeStamp.getNtpTime(destTime);
        System.out.println(" Destination Timestamp:\t" + destNtpTime + "  " + destNtpTime.toDateString());


        info.computeDetails(); // compute offset/delay if not already done
        Long offsetValue = info.getOffset();
        Long delayValue = info.getDelay();
        String delay = (delayValue == null) ? "N/A" : delayValue.toString();

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        junit.textui.TestRunner.run(TimeStampTest.class);
    }


    public void testCompare() {


        TimeStamp ts1 = new TimeStamp(TIME1);   // Tue, Dec 17 2002 14:07:24.810 UTC
        TimeStamp ts2 = new TimeStamp(TIME1);
        TimeStamp ts3 = new TimeStamp(TIME2);   // Tue, Dec 17 2002 14:07:24.810 UTC
        TimeStamp ts4 = new TimeStamp(TIME3);   // Tue, Dec 17 2002 14:07:25.810 UTC


        // do assertion tests on TimeStamp class
        assertEquals("equals(1,2)", ts1, ts2);
        assertTrue("compareTo(1,2)", ts1.compareTo(ts2) == 0);
        assertEquals("ntpValue(1,2)", ts1.ntpValue(), ts2.ntpValue());
        assertEquals("hashCode(1,2)", ts1.hashCode(), ts2.hashCode());
        assertEquals("ts1==ts1", ts1, ts1);


    // timestamps in ts1 (TIME1) and ts3 (TIME2) are only off by the smallest
    // fraction of a second (~200 picoseconds) so the times are not equal but
    // when converted to Java dates (in milliseconds) they will be equal.
        assertTrue("ts1 != ts3", !ts1.equals(ts3));
        assertTrue("compareTo(1,3)", ts1.compareTo(ts3) == -1);
        assertEquals("seconds", ts1.getSeconds(), ts3.getSeconds());
        assertTrue("fraction", ts1.getFraction() != ts3.getFraction());
        assertTrue("ntpValue(1,3)", ts1.ntpValue() != ts3.ntpValue());
        assertTrue("hashCode(1,3)", ts1.hashCode() != ts3.hashCode());
        long time1 = ts1.getTime();
        long time3 = ts3.getTime();
        assertEquals("equals(time1,3)", time1, time3); // ntpTime1 != ntpTime3 but JavaTime(t1) == JavaTime(t3)...


        assertTrue("ts3 != ts4", !ts3.equals(ts4));
        assertTrue("time3 != ts4.time", time3 != ts4.getTime());
    }

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        assertTrue("ts3 != ts4", !ts3.equals(ts4));
        assertTrue("time3 != ts4.time", time3 != ts4.getTime());
    }


    public void testUTCString() {
        TimeStamp ts1 = new TimeStamp(TIME1);   // Tue, Dec 17 2002 14:07:24.810 UTC
    String actual = ts1.toUTCString();
    assertEquals("Tue, Dec 17 2002 14:07:24.810 UTC", actual);
    }

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    public void testDateConversion() {
    // convert current date to NtpTimeStamp then compare Java date
    // computed from NTP timestamp with original Java date.
    Calendar refCal = Calendar.getInstance(java.util.TimeZone.getTimeZone("UTC"));
    Date refDate = refCal.getTime();
    TimeStamp ts = new TimeStamp(refDate);
    assertEquals("refDate.getTime()", refDate.getTime(), ts.getTime());
    Date tsDate = ts.getDate();
    assertEquals(refDate, tsDate);
    }

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    private static final String TIME2 = "c1a9ae1c.cf6ac48f";  // Tue, Dec 17 2002 14:07:24.810 UTC
    private static final String TIME3 = "c1a9ae1d.cf6ac48e";  // Tue, Dec 17 2002 14:07:25.810 UTC


    public void testCompare() {


        TimeStamp ts1 = new TimeStamp(TIME1);   // Tue, Dec 17 2002 14:07:24.810 UTC
        TimeStamp ts2 = new TimeStamp(TIME1);
        TimeStamp ts3 = new TimeStamp(TIME2);   // Tue, Dec 17 2002 14:07:24.810 UTC
        TimeStamp ts4 = new TimeStamp(TIME3);   // Tue, Dec 17 2002 14:07:25.810 UTC


        // do assertion tests on TimeStamp class
        assertEquals("equals(1,2)", ts1, ts2);
        assertEquals("compareTo(1,2)", 0, ts1.compareTo(ts2));
        assertEquals("ntpValue(1,2)", ts1.ntpValue(), ts2.ntpValue());
        assertEquals("hashCode(1,2)", ts1.hashCode(), ts2.hashCode());
        assertEquals("ts1==ts1", ts1, ts1);


    // timestamps in ts1 (TIME1) and ts3 (TIME2) are only off by the smallest
    // fraction of a second (~200 picoseconds) so the times are not equal but
    // when converted to Java dates (in milliseconds) they will be equal.
        assertTrue("ts1 != ts3", !ts1.equals(ts3));
        assertEquals("compareTo(1,3)", -1, ts1.compareTo(ts3));
        assertEquals("seconds", ts1.getSeconds(), ts3.getSeconds());
        assertTrue("fraction", ts1.getFraction() != ts3.getFraction());
        assertTrue("ntpValue(1,3)", ts1.ntpValue() != ts3.ntpValue());
        assertTrue("hashCode(1,3)", ts1.hashCode() != ts3.hashCode());
        long time1 = ts1.getTime();
        long time3 = ts3.getTime();
        assertEquals("equals(time1,3)", time1, time3); // ntpTime1 != ntpTime3 but JavaTime(t1) == JavaTime(t3)...


        assertTrue("ts3 != ts4", !ts3.equals(ts4));
        assertTrue("time3 != ts4.time", time3 != ts4.getTime());
    }

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        assertTrue("ts3 != ts4", !ts3.equals(ts4));
        assertTrue("time3 != ts4.time", time3 != ts4.getTime());
    }


    public void testUTCString() {
        TimeStamp ts1 = new TimeStamp(TIME1);   // Tue, Dec 17 2002 14:07:24.810 UTC
    String actual = ts1.toUTCString();
    assertEquals("Tue, Dec 17 2002 14:07:24.810 UTC", actual);
    }

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