Examples of org.joda.time.DateTime.plusHours()

org.joda.time.DateTime.plusHours()
Returns a copy of this datetime plus the specified number of hours.
The calculation will add a duration equivalent to the number of hours expressed in milliseconds.
For example, if a spring daylight savings cutover is from 01:59 to 03:00 then adding one hour to 01:30 will result in 03:30. This is a duration of one hour later, even though the hour field value changed from 1 to 3.
The following three lines are identical in effect:
```
 DateTime added = dt.plusHours(6); DateTime added = dt.plus(Period.hours(6)); DateTime added = dt.withFieldAdded(DurationFieldType.hours(), 6); 
```
This datetime instance is immutable and unaffected by this method call. @param hours the amount of hours to add, may be negative @return the new datetime plus the increased hours @since 1.1

    ObjectNode event = JOM.createObjectNode();
    
    if (start == null) {
      // set start to current time, rounded to hours
      DateTime startDate = DateTime.now();
      startDate = startDate.plusHours(1);
      startDate = startDate.minusMinutes(startDate.getMinuteOfHour());
      startDate = startDate.minusSeconds(startDate.getSecondOfMinute());
      startDate = startDate.minusMillis(startDate.getMillisOfSecond());
      start = startDate.toString();
    }

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    ObjectNode event = JOM.createObjectNode();
    
    if (start == null) {
      // set start to current time, rounded to hours
      DateTime startDate = DateTime.now();
      startDate = startDate.plusHours(1);
      startDate = startDate.minusMinutes(startDate.getMinuteOfHour());
      startDate = startDate.minusSeconds(startDate.getSecondOfMinute());
      startDate = startDate.minusMillis(startDate.getMillisOfSecond());
      start = startDate.toString();
    }

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                    } else if (endTimeStamp == 0) {
                        DateTime time = new DateTime(timeStamp);
                        statusMsg += " begin read at " + time.toString();
                        context.setStatus(statusMsg);
                        log.info(key.getTopic() + " begin read at " + time.toString());
                        endTimeStamp = (time.plusHours(this.maxPullHours)).getMillis();
                    } else if (timeStamp > endTimeStamp || System.currentTimeMillis() > maxPullTime) {
                        if (timeStamp > endTimeStamp)
                            log.info("Kafka Max history hours reached");
                        if (System.currentTimeMillis() > maxPullTime)
                            log.info("Kafka pull time limit reached");

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        ObjectNode event = JOM.createObjectNode();


        if (start == null) {
            // set start to current time, rounded to hours
            DateTime startDate = DateTime.now();
            startDate = startDate.plusHours(1);
            startDate = startDate.minusMinutes(startDate.getMinuteOfHour());
            startDate = startDate.minusSeconds(startDate.getSecondOfMinute());
            startDate = startDate.minusMillis(startDate.getMillisOfSecond());
            start = startDate.toString();
        }

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        DateTime dateTime = new DateTime(2001, 1, 22, 3, 4, 5, 321, DateTimeZone.UTC);
        long seconds = getSeconds(dateTime);


        assertFunction("date_add('second', 3, " + seconds + ")", getSeconds(dateTime.plusSeconds(3)));
        assertFunction("date_add('minute', 3, " + seconds + ")", getSeconds(dateTime.plusMinutes(3)));
        assertFunction("date_add('hour', 3, " + seconds + ")", getSeconds(dateTime.plusHours(3)));
        assertFunction("date_add('day', 3, " + seconds + ")", getSeconds(dateTime.plusDays(3)));
        assertFunction("date_add('week', 3, " + seconds + ")", getSeconds(dateTime.plusWeeks(3)));
        assertFunction("date_add('month', 3, " + seconds + ")", getSeconds(dateTime.plusMonths(3)));
        assertFunction("date_add('quarter', 3, " + seconds + ")", getSeconds(dateTime.plusMonths(3 * 3)));
        assertFunction("date_add('year', 3, " + seconds + ")", getSeconds(dateTime.plusYears(3)));

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    public void time()
    {
        DateTime startDate = new DateTime().dayOfMonth().withMinimumValue();
        DateTime endDate = new DateTime().dayOfMonth().withMaximumValue();
        Activity start = td.newActivity(startDate, startDate.plusHours(1));
        Activity end = td.newActivity(endDate, endDate.plusHours(1));


        Day cut = new Day();
        assertNull(cut.getStart());
        assertNull(cut.getEnd());
        cut.add(start);

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    public void time()
    {
        DateTime startDate = new DateTime().dayOfMonth().withMinimumValue().plusDays(5);
        DateTime endDate = new DateTime().dayOfMonth().withMaximumValue().minusDays(5);
        Activity start = td.newActivity(startDate, startDate.plusHours(1));
        Activity end = td.newActivity(endDate, endDate.plusHours(1));


        Week cut = new Week();
        assertNull(cut.getStart());
        assertNull(cut.getEnd());
        cut.add(start);

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    @Test
    public void matchingRange()
    {
        Activity activity = td.newActivity();
        DateTime date = new DateTime().minusYears(1);
        Activity lastYear = td.newActivity(date, date.plusHours(1));


        // empty
        Activities cut = td.newActivities(WEEK);
        assertTrue(cut.matchingRange(activity));
        assertFalse(cut.matchingRange(lastYear));

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        // month
        DateTime startDate = new DateTime().dayOfMonth().withMinimumValue().plusDays(5);
        DateTime endDate = new DateTime().dayOfMonth().withMaximumValue().minusDays(5);
        Activity start = td.newActivity(startDate, startDate.plusHours(1));
        Activity end = td.newActivity(endDate, endDate.plusHours(1));
        internalGetStartEnd(td.month(), start, end);


        // week
        startDate = new DateTime().dayOfWeek().withMinimumValue();
        endDate = new DateTime().dayOfWeek().withMaximumValue();

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        // week
        startDate = new DateTime().dayOfWeek().withMinimumValue();
        endDate = new DateTime().dayOfWeek().withMaximumValue();
        start = td.newActivity(startDate, startDate.plusHours(1));
        end = td.newActivity(endDate, endDate.plusHours(1));
        internalGetStartEnd(td.week(), start, end);


        // day
        startDate = new DateTime().hourOfDay().withMinimumValue();
        endDate = new DateTime().hourOfDay().withMaximumValue().minusHours(1);

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