public static String formatFileName(String taskName, Instant firstLogTime, String agentId) {
return String.format(
ENGLISH,
"%s@%08x%08x.%s",
taskName,
firstLogTime.getEpochSecond(),
firstLogTime.getNano(),
agentId)
+ LOG_GZ_FILE_SUFFIX;
}
/**
* Gets the previous transition before the specified instant.
*
* <p>This returns details of the previous transition after the specified instant. For example, if
* the instant represents a point where "summer" daylight saving time applies, then the method
* will return the transition from the previous "winter" time.
*
* @param instant the instant to get the previous transition after, not null, but null may be
* ignored if the rules have a single offset for all instants
* @return the previous transition after the specified instant, null if this is before the first
* transition
*/
public ZoneOffsetTransition previousTransition(Instant instant) {
if (savingsInstantTransitions.length == 0) {
return null;
}
long epochSec = instant.getEpochSecond();
if (instant.getNano() > 0 && epochSec < Long.MAX_VALUE) {
epochSec += 1; // allow rest of method to only use seconds
}
// check if using last rules
long lastHistoric = savingsInstantTransitions[savingsInstantTransitions.length - 1];
if (lastRules.length > 0 && epochSec > lastHistoric) {
// search year the instant is in
ZoneOffset lastHistoricOffset = wallOffsets[wallOffsets.length - 1];
int year = findYear(epochSec, lastHistoricOffset);
ZoneOffsetTransition[] transArray = findTransitionArray(year);
for (int i = transArray.length - 1; i >= 0; i--) {
if (epochSec > transArray[i].toEpochSecond()) {
return transArray[i];
}
}
// use last from preceding year
int lastHistoricYear = findYear(lastHistoric, lastHistoricOffset);
if (--year > lastHistoricYear) {
transArray = findTransitionArray(year);
return transArray[transArray.length - 1];
}
// drop through
}
// using historic rules
int index = Arrays.binarySearch(savingsInstantTransitions, epochSec);
if (index < 0) {
index = -index - 1;
}
if (index <= 0) {
return null;
}
return new ZoneOffsetTransition(
savingsInstantTransitions[index - 1], wallOffsets[index - 1], wallOffsets[index]);
}