How to use

Segment

in

org.apache.druid.segment

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

@Override
public QueryableIndex asQueryableIndex()
{
 return !isClosed() ? baseSegment.asQueryableIndex() : 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.getId());
   }
   catch (Exception e2) {
    // ignore
   }
  }
  // Always terminate.
  return true;
 }
};

final QueryableIndex index = segment.asQueryableIndex();
final StorageAdapter adapter = segment.asStorageAdapter();
final List<DimensionSpec> searchDims = getDimsToSearch(adapter.getAvailableDimensions(), query.getDimensions());

               Collections.singletonList(segment.getDataInterval()) : null;
 metadata = segment.asStorageAdapter().getMetadata();
 if (metadata != null && metadata.getAggregators() != null) {
  aggregators = new HashMap<>();
if (updatedQuery.hasTimestampSpec()) {
 if (metadata == null) {
  metadata = segment.asStorageAdapter().getMetadata();
if (updatedQuery.hasQueryGranularity()) {
 if (metadata == null) {
  metadata = segment.asStorageAdapter().getMetadata();
if (updatedQuery.hasRollup()) {
 if (metadata == null) {
  metadata = segment.asStorageAdapter().getMetadata();
  Collections.singletonList(
    new SegmentAnalysis(
      segment.getId().toString(),
      retIntervals,
      columns,

               Collections.singletonList(segment.getDataInterval()) : null;
 metadata = segment.asStorageAdapter().getMetadata();
 if (metadata != null && metadata.getAggregators() != null) {
  aggregators = Maps.newHashMap();
if (updatedQuery.hasTimestampSpec()) {
 if (metadata == null) {
  metadata = segment.asStorageAdapter().getMetadata();
if (updatedQuery.hasQueryGranularity()) {
 if (metadata == null) {
  metadata = segment.asStorageAdapter().getMetadata();
if (updatedQuery.hasRollup()) {
 if (metadata == null) {
  metadata = segment.asStorageAdapter().getMetadata();
  Collections.singletonList(
    new SegmentAnalysis(
      segment.getIdentifier(),
      retIntervals,
      columns,

public GroupByQueryRunner(Segment segment, final GroupByStrategySelector strategySelector)
{
 this.adapter = segment.asStorageAdapter();
 this.strategySelector = strategySelector;
}

final long timeoutAt = (long) responseContext.get(ScanQueryRunnerFactory.CTX_TIMEOUT_AT);
final long start = System.currentTimeMillis();
final StorageAdapter adapter = segment.asStorageAdapter();
Preconditions.checkArgument(intervals.size() == 1, "Can only handle a single interval, got[%s]", intervals);
final SegmentId segmentId = segment.getId();

final long timeoutAt = (long) responseContext.get(ScanQueryRunnerFactory.CTX_TIMEOUT_AT);
final long start = System.currentTimeMillis();
final StorageAdapter adapter = segment.asStorageAdapter();
Preconditions.checkArgument(intervals.size() == 1, "Can only handle a single interval, got[%s]", intervals);
final String segmentId = segment.getIdentifier();

 @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;
 }
};

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

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

 @Override
 public <T> T as(Class<T> clazz)
 {
  return getBaseSegment().as(clazz);
 }
}

final QueryableIndex index = segment.asQueryableIndex();
final StorageAdapter storageAdapter = segment.asStorageAdapter();

public DataSourceMetadataQueryRunner(Segment segment)
{
 this.adapter = segment.asStorageAdapter();
}

public Sequence<Result<SelectResultValue>> process(final SelectQuery query, final Segment segment)
 final StorageAdapter adapter = segment.asStorageAdapter();
 final String segmentId = segment.getId().withInterval(intervals.get(0)).toString();

public Sequence<Result<SelectResultValue>> process(final SelectQuery query, final Segment segment)
 final StorageAdapter adapter = segment.asStorageAdapter();
 final String segmentId = DataSegmentUtils.withInterval(dataSource, segment.getIdentifier(), intervals.get(0));

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

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;
  }
 }
}

 @Override
 public <T> T as(Class<T> clazz)
 {
  return getBaseSegment().as(clazz);
 }
}