Package org.apache.druid.timeline.partition

Interface OverwriteShardSpec

All Superinterfaces:

ShardSpec

All Known Implementing Classes:

NumberedOverwriteShardSpec

public interface OverwriteShardSpec
extends ShardSpec

ShardSpec for non-first-generation segments. This shardSpec is created only by overwriting tasks using segment locks. This shardSpec is allocated a partitionId between PartitionIds.NON_ROOT_GEN_START_PARTITION_ID and PartitionIds.NON_ROOT_GEN_END_PARTITION_ID.

See Also:

• Overshadowable

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.druid.timeline.partition.ShardSpec

ShardSpec.Type

Method Summary

Modifier and Type	Method	Description
default int	getNumCorePartitions()	The core partition concept is not used with segment locking.
default boolean	sharePartitionSpace(PartialShardSpec partialShardSpec)	Returns true if this shardSpec and the given PartialShardSpec share the same partition space.
default OverwriteShardSpec	withAtomicUpdateGroupSize(int atomicUpdateGroupSize)
OverwriteShardSpec	withAtomicUpdateGroupSize(short atomicUpdateGroupSize)

Methods inherited from interface org.apache.druid.timeline.partition.ShardSpec

canCreateNumberedPartitionChunk, createChunk, getAtomicUpdateGroupSize, getDomainDimensions, getDomainVirtualColumns, getEndRootPartitionId, getLookup, getMinorVersion, getPartitionNum, getStartRootPartitionId, getType, possibleInDomain, withCorePartitions, withPartitionNum

Method Details

getNumCorePartitions

default int getNumCorePartitions()

The core partition concept is not used with segment locking. Instead, the AtomicUpdateGroup is used to atomically overshadow segments. Here, we always return 0 so that the PartitionHolder skips checking the completeness of the core partitions.

Specified by:

getNumCorePartitions in interface ShardSpec

withAtomicUpdateGroupSize

default OverwriteShardSpec withAtomicUpdateGroupSize(int atomicUpdateGroupSize)

withAtomicUpdateGroupSize

OverwriteShardSpec withAtomicUpdateGroupSize(short atomicUpdateGroupSize)

sharePartitionSpace

default boolean sharePartitionSpace(PartialShardSpec partialShardSpec)

Returns true if this shardSpec and the given PartialShardSpec share the same partition space. This shardSpec uses non-root-generation partition space and thus does not share the space with other shardSpecs.

Specified by:

sharePartitionSpace in interface ShardSpec

See Also:

• PartitionIds