Package org.apache.druid.timeline.partition

Class HashBasedNumberedShardSpec

java.lang.Object

org.apache.druid.timeline.partition.NumberedShardSpec

org.apache.druid.timeline.partition.HashBasedNumberedShardSpec

All Implemented Interfaces:

ShardSpec

public class HashBasedNumberedShardSpec
extends NumberedShardSpec

Nested Class Summary

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

ShardSpec.Type

Field Summary

Fields

Modifier and Type	Field	Description
static List<String>	DEFAULT_PARTITION_DIMENSIONS

Constructor Summary

Constructors

Constructor	Description
HashBasedNumberedShardSpec(int partitionNum, int partitions, Integer bucketId, Integer numBuckets, List<String> partitionDimensions, HashPartitionFunction partitionFunction, com.fasterxml.jackson.databind.ObjectMapper jsonMapper)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
int	getBucketId()
List<String>	getDomainDimensions()	Get dimensions who have possible range for the rows this shard contains.
ShardSpecLookup	getLookup(List<? extends ShardSpec> shardSpecs)
int	getNumBuckets()
List<String>	getPartitionDimensions()
HashPartitionFunction	getPartitionFunction()
String	getType()	Get the type name of this ShardSpec.
int	hashCode()
boolean	possibleInDomain(Map<String,com.google.common.collect.RangeSet<String>> domain)	if given domain ranges are not possible in this shard, return false; otherwise return true;
static byte[]	serializeGroupKey(com.fasterxml.jackson.databind.ObjectMapper jsonMapper, List<Object> partitionKeys)	Serializes a group key into a byte array.
String	toString()

Methods inherited from class org.apache.druid.timeline.partition.NumberedShardSpec

createChunk, getNumCorePartitions, getPartitionNum

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

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

getAtomicUpdateGroupSize, getEndRootPartitionId, getMinorVersion, getStartRootPartitionId, sharePartitionSpace

Field Detail

DEFAULT_PARTITION_DIMENSIONS

public static final List<String> DEFAULT_PARTITION_DIMENSIONS

Constructor Detail

HashBasedNumberedShardSpec

public HashBasedNumberedShardSpec(int partitionNum,
                                  int partitions,
                                  @Nullable
                                  Integer bucketId,
                                  @Nullable
                                  Integer numBuckets,
                                  @Nullable
                                  List<String> partitionDimensions,
                                  @Nullable
                                  HashPartitionFunction partitionFunction,
                                  com.fasterxml.jackson.databind.ObjectMapper jsonMapper)

Method Detail

getBucketId

public int getBucketId()

getNumBuckets

public int getNumBuckets()

getPartitionDimensions

public List<String> getPartitionDimensions()

getPartitionFunction

@Nullable
public HashPartitionFunction getPartitionFunction()

getDomainDimensions

public List<String> getDomainDimensions()

Description copied from interface: ShardSpec

Get dimensions who have possible range for the rows this shard contains.

Specified by:

getDomainDimensions in interface ShardSpec

Overrides:

getDomainDimensions in class NumberedShardSpec

Returns:

list of dimensions who has its possible range. Dimensions with unknown possible range are not listed

getLookup

public ShardSpecLookup getLookup(List<? extends ShardSpec> shardSpecs)

Specified by:

getLookup in interface ShardSpec

Overrides:

getLookup in class NumberedShardSpec

possibleInDomain

public boolean possibleInDomain(Map<String,com.google.common.collect.RangeSet<String>> domain)

Description copied from interface: ShardSpec

if given domain ranges are not possible in this shard, return false; otherwise return true;

Specified by:

possibleInDomain in interface ShardSpec

Overrides:

possibleInDomain in class NumberedShardSpec

Returns:

possibility of in domain

serializeGroupKey

public static byte[] serializeGroupKey(com.fasterxml.jackson.databind.ObjectMapper jsonMapper,
                                       List<Object> partitionKeys)

Serializes a group key into a byte array. The serialization algorithm can affect hash values of partition keys since HashPartitionFunction.hash(byte[], int) takes the result of this method as its input. This means, the returned byte array should be backwards-compatible in cases where we need to modify this method.

getType

public String getType()

Description copied from interface: ShardSpec

Get the type name of this ShardSpec.

Specified by:

getType in interface ShardSpec

Overrides:

getType in class NumberedShardSpec

equals

public boolean equals(Object o)

Overrides:

equals in class NumberedShardSpec

hashCode

public int hashCode()

Overrides:

hashCode in class NumberedShardSpec

toString

public String toString()

Overrides:

toString in class NumberedShardSpec