FireHydrant (druid-server 0.19.0 API)

Constructors
Constructor and Description
`FireHydrant(IncrementalIndex index, int count, SegmentId segmentId)`
`FireHydrant(Segment adapter, int count)`

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`Pair<ReferenceCountingSegment,Closeable>`	`getAndIncrementSegment()`
`int`	`getCount()`
`ReferenceCountingSegment`	`getHydrantSegment()`
`ReferenceCountingSegment`	`getIncrementedSegment()`
`IncrementalIndex`	`getIndex()`
`org.joda.time.Interval`	`getSegmentDataInterval()`
`Optional<Pair<SegmentReference,Closeable>>`	`getSegmentForQuery(Function<SegmentReference,SegmentReference> segmentMapFn)` This method is like a combined form of `getIncrementedSegment()` and `getAndIncrementSegment()` that deals in `SegmentReference` instead of directly with `ReferenceCountingSegment` in order to acquire reference count for both hydrant's segment and any tracked joinables taking part in the query.
`SegmentId`	`getSegmentId()`
`boolean`	`hasSwapped()`
`void`	`swapSegment(Segment newSegment)`
`String`	`toString()`

public FireHydrant(IncrementalIndex index,
                   int count,
                   SegmentId segmentId)

public FireHydrant(Segment adapter,
                   int count)

public org.joda.time.Interval getSegmentDataInterval()

public void swapSegment(@Nullable
                        Segment newSegment)

public ReferenceCountingSegment getIncrementedSegment()

public Pair<ReferenceCountingSegment,Closeable> getAndIncrementSegment()

getSegmentForQuery
```
public Optional<Pair<SegmentReference,Closeable>> getSegmentForQuery(Function<SegmentReference,SegmentReference> segmentMapFn)
```
This method is like a combined form of getIncrementedSegment() and getAndIncrementSegment() that deals in SegmentReference instead of directly with ReferenceCountingSegment in order to acquire reference count for both hydrant's segment and any tracked joinables taking part in the query.

public ReferenceCountingSegment getHydrantSegment()

Class FireHydrant