How to use

getIdentifier

method

in

org.apache.druid.segment.Segment

@Override
public String getIdentifier()
{
 return !isClosed() ? baseSegment.getIdentifier() : null;
}

 @Override
 protected boolean onAdvance(int phase, int registeredParties)
 {
  Preconditions.checkState(registeredParties == 0);
  // Ensure that onAdvance() doesn't throw exception, otherwise termination won't happen
  try {
   baseSegment.close();
  }
  catch (Exception e) {
   try {
    log.error(e, "Exception while closing segment[%s]", baseSegment.getIdentifier());
   }
   catch (Exception e2) {
    // ignore
   }
  }
  // Always terminate.
  return true;
 }
};

public void swapSegment(@Nullable Segment newSegment)
{
 while (true) {
  ReferenceCountingSegment currentSegment = adapter.get();
  if (currentSegment == null && newSegment == null) {
   return;
  }
  if (currentSegment != null && newSegment != null &&
    !newSegment.getIdentifier().equals(currentSegment.getIdentifier())) {
   // Sanity check: identifier should not change
   throw new ISE(
     "WTF?! Cannot swap identifier[%s] -> [%s]!",
     currentSegment.getIdentifier(),
     newSegment.getIdentifier()
   );
  }
  if (currentSegment == newSegment) {
   throw new ISE("Cannot swap to the same segment");
  }
  ReferenceCountingSegment newReferenceCountingSegment =
    newSegment != null ? new ReferenceCountingSegment(newSegment) : null;
  if (adapter.compareAndSet(currentSegment, newReferenceCountingSegment)) {
   if (currentSegment != null) {
    currentSegment.close();
   }
   index = null;
   return;
  }
 }
}

Preconditions.checkArgument(intervals.size() == 1, "Can only handle a single interval, got[%s]", intervals);
final String segmentId = segment.getIdentifier();

Collections.singletonList(
  new SegmentAnalysis(
    segment.getIdentifier(),
    retIntervals,
    columns,

final String segmentId = DataSegmentUtils.withInterval(dataSource, segment.getIdentifier(), intervals.get(0));