java.time.OffsetDateTime#getDayOfMonth ( )源码实例Demo

/**
 * Calculates the period for which the resource usage like volume of used data, connection duration etc. 
 * is to be retrieved from the Prometheus server based on the mode defined by 
 * {@link TenantConstants#FIELD_PERIOD_MODE}.
 *
 * @param effectiveSince The point of time on which the resource limit came into effect.
 * @param currentDateTime The current date and time used for the resource usage period calculation.
 * @param mode The mode of the period defined by {@link TenantConstants#FIELD_PERIOD_MODE}.
 * @param periodInDays The number of days defined by {@link TenantConstants#FIELD_PERIOD_NO_OF_DAYS}. 
 * @return The period in days for which the resource usage is to be calculated.
 */
long calculateResourceUsagePeriod(
        final OffsetDateTime effectiveSince,
        final OffsetDateTime currentDateTime,
        final PeriodMode mode,
        final long periodInDays) {
    final long inclusiveDaysBetween = ChronoUnit.DAYS.between(effectiveSince, currentDateTime) + 1;
    switch (mode) {
    case DAYS:
        if (inclusiveDaysBetween > 0 && periodInDays > 0) {
            final long dataUsagePeriodInDays = inclusiveDaysBetween % periodInDays;
            return dataUsagePeriodInDays == 0 ? periodInDays : dataUsagePeriodInDays;
        }
        return 0L;
    case MONTHLY:
        if (YearMonth.from(currentDateTime).equals(YearMonth.from(effectiveSince))
                && effectiveSince.getDayOfMonth() != 1) {
            return inclusiveDaysBetween;
        }
        return currentDateTime.getDayOfMonth();
    default:
        return 0L;
    }
}
 

void initImageCreationTime(OffsetDateTime offsetDateTime) {
    // Check for incoming arguments
    if (offsetDateTime != null) {
        // set values that make up Standard/Document/ImageCreationTime
        creation_time_present = true;
        creation_time_year    = offsetDateTime.getYear();
        creation_time_month   = offsetDateTime.getMonthValue();
        creation_time_day     = offsetDateTime.getDayOfMonth();
        creation_time_hour    = offsetDateTime.getHour();
        creation_time_minute  = offsetDateTime.getMinute();
        creation_time_second  = offsetDateTime.getSecond();
        creation_time_offset  = offsetDateTime.getOffset();
    }
}
 

public static int writeGeneralizedTime(Date time, byte[] out, int offset) {
  OffsetDateTime offsetTime = time.toInstant().atOffset(ZoneOffset.UTC);
  int idx = offset;
  out[idx++] = 0x18;
  out[idx++] = 15;
  // yyyyMMddhhmmssZ
  // year
  int year = offsetTime.getYear();
  out[idx++] = (byte) (0x30 + year / 1000);
  out[idx++] = (byte) (0x30 + year / 100 % 10);
  out[idx++] = (byte) (0x30 + year / 10 % 10);
  out[idx++] = (byte) (0x30 + year % 10);
  // month
  int month = offsetTime.getMonthValue();
  out[idx++] = (byte) (0x30 + month / 10);
  out[idx++] = (byte) (0x30 + month % 10);
  // day
  int day = offsetTime.getDayOfMonth();
  out[idx++] = (byte) (0x30 + day / 10);
  out[idx++] = (byte) (0x30 + day % 10);
  // hour
  int hour = offsetTime.getHour();
  out[idx++] = (byte) (0x30 + hour / 10);
  out[idx++] = (byte) (0x30 + hour % 10);
  // minute
  int minute = offsetTime.getMinute();
  out[idx++] = (byte) (0x30 + minute / 10);
  out[idx++] = (byte) (0x30 + minute % 10);
  // second
  int second = offsetTime.getSecond();
  out[idx++] = (byte) (0x30 + second / 10);
  out[idx++] = (byte) (0x30 + second % 10);
  out[idx++] = 'Z';
  return idx - offset;
}
 

/**
 * Calculates the effective resource limit for a tenant for the given period from the configured values.
 * <p>
 * In the <em>monthly</em> mode, if the effectiveSince date doesn't fall on the 
 * first day of the month then the effective resource limit for the tenant is 
 * calculated as below.
 * <pre>
 *             configured limit 
 *   ---------------------------------- x No. of days from effectiveSince till lastDay of the targetDateMonth.
 *    No. of days in the current month
 * </pre>
 * <p>
 * For rest of the months and the <em>days</em> mode, the configured limit is used directly.
 *
 * @param effectiveSince The point of time on which the given resource limit came into effect.
 * @param targetDateTime The target date and time.
 * @param mode The mode of the period. 
 * @param configuredLimit The configured limit. 
 * @return The effective resource limit that has been calculated.
 */
long calculateEffectiveLimit(
        final OffsetDateTime effectiveSince,
        final OffsetDateTime targetDateTime,
        final PeriodMode mode,
        final long configuredLimit) {
    if (PeriodMode.MONTHLY.equals(mode)
            && configuredLimit > 0
            && !targetDateTime.isBefore(effectiveSince)
            && YearMonth.from(targetDateTime).equals(YearMonth.from(effectiveSince))
            && effectiveSince.getDayOfMonth() != 1) {
        final OffsetDateTime lastDayOfMonth = effectiveSince.with(TemporalAdjusters.lastDayOfMonth());
        final long daysBetween = ChronoUnit.DAYS
                .between(effectiveSince, lastDayOfMonth) + 1;
        return Double.valueOf(Math.ceil(daysBetween * configuredLimit / lastDayOfMonth.getDayOfMonth()))
                .longValue();
    }
    return configuredLimit;
}
 

int getDay(OffsetDateTime offsetDateTime) {
    return offsetDateTime.getDayOfMonth();
}