org.apache.druid.timeline

Interface Overshadowable<T extends Overshadowable<T>>

All Known Implementing Classes:

DataSegment, ReferenceCountingSegment

public interface Overshadowable<T extends Overshadowable<T>>

Interface to represent a class which can have overshadow relation between its instances. In VersionedIntervalTimeline, Overshadowable is used to represent each DataSegment which has the same major version in the same time chunk. An Overshadowable overshadows another if its root partition range contains that of another and has a higher minorVersion. For more details, check https://github.com/apache/druid/issues/7491.

Method Summary

Modifier and Type	Method and Description
default boolean	containsRootPartition(T other)
short	getAtomicUpdateGroupSize() Return the size of atomicUpdateGroup.
int	getEndRootPartitionId() See doc of getStartRootPartitionId().
short	getMinorVersion()
int	getStartRootPartitionId() All overshadowables have root partition range.
String	getVersion()
default boolean	hasData()
default boolean	overshadows(T other) Returns true if this overshadowable overshadows the other.

Method Detail

overshadows

default boolean overshadows(T other)

Returns true if this overshadowable overshadows the other.

containsRootPartition

default boolean containsRootPartition(T other)

getStartRootPartitionId

int getStartRootPartitionId()

All overshadowables have root partition range. First-generation overshadowables have (partitionId, partitionId + 1) as their root partition range. Non-first-generation overshadowables are the overshadowables that overwrite first or non-first generation overshadowables, and they have the merged root partition range of all overwritten first-generation overshadowables. Note that first-generation overshadowables can be overwritten by a single non-first-generation overshadowable if they have consecutive partitionId. Non-first-generation overshadowables can be overwritten by another if their root partition ranges are consecutive.

getEndRootPartitionId

int getEndRootPartitionId()

See doc of getStartRootPartitionId().

getVersion

String getVersion()

getMinorVersion

short getMinorVersion()

getAtomicUpdateGroupSize

short getAtomicUpdateGroupSize()

Return the size of atomicUpdateGroup. An atomicUpdateGroup is a set of segments which should be updated all together atomically in VersionedIntervalTimeline.

hasData

default boolean hasData()