org.apache.hudi.common.model

Class HoodieConsistentHashingMetadata

java.lang.Object

org.apache.hudi.common.model.HoodieConsistentHashingMetadata

All Implemented Interfaces:

Serializable

public class HoodieConsistentHashingMetadata
extends Object
implements Serializable

All the metadata that is used for consistent hashing bucket index

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected List<ConsistentHashingNode>	childrenNodes
static int	HASH_VALUE_MASK Upper-bound of the hash value
static String	HASHING_METADATA_COMMIT_FILE_SUFFIX
static String	HASHING_METADATA_FILE_SUFFIX

Constructor Summary

Constructors

Constructor and Description
HoodieConsistentHashingMetadata(short version, String partitionPath, String instant, int numBuckets, int seqNo, List<ConsistentHashingNode> nodes)
HoodieConsistentHashingMetadata(String partitionPath, int numBuckets) Only used for creating new hashing metadata.

Method Summary

Modifier and Type	Method and Description
static HoodieConsistentHashingMetadata	fromBytes(byte[] bytes)
protected static <T> T	fromJsonString(String jsonStr, Class<T> clazz)
List<ConsistentHashingNode>	getChildrenNodes()
String	getFilename()
String	getInstant()
List<ConsistentHashingNode>	getNodes()
int	getNumBuckets()
String	getPartitionPath()
int	getSeqNo()
static String	getTimestampFromFile(String filename) Get instant time from the hashing metadata filename Pattern of the filename: .HASHING_METADATA_FILE_SUFFIX
short	getVersion()
boolean	isFirstCreated()
void	setChildrenNodes(List<ConsistentHashingNode> childrenNodes)
byte[]	toBytes()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

HASH_VALUE_MASK

public static final int HASH_VALUE_MASK

Upper-bound of the hash value

See Also:

Constant Field Values

HASHING_METADATA_FILE_SUFFIX

public static final String HASHING_METADATA_FILE_SUFFIX

See Also:

Constant Field Values

HASHING_METADATA_COMMIT_FILE_SUFFIX

public static final String HASHING_METADATA_COMMIT_FILE_SUFFIX

See Also:

Constant Field Values

childrenNodes

protected List<ConsistentHashingNode> childrenNodes

Constructor Detail

HoodieConsistentHashingMetadata

public HoodieConsistentHashingMetadata(short version,
                                       String partitionPath,
                                       String instant,
                                       int numBuckets,
                                       int seqNo,
                                       List<ConsistentHashingNode> nodes)

HoodieConsistentHashingMetadata

public HoodieConsistentHashingMetadata(String partitionPath,
                                       int numBuckets)

Only used for creating new hashing metadata. Construct default metadata with all bucket's file group uuid initialized

Method Detail

getVersion

public short getVersion()

getPartitionPath

public String getPartitionPath()

getInstant

public String getInstant()

getNumBuckets

public int getNumBuckets()

getSeqNo

public int getSeqNo()

isFirstCreated

public boolean isFirstCreated()

getNodes

public List<ConsistentHashingNode> getNodes()

getChildrenNodes

public List<ConsistentHashingNode> getChildrenNodes()

setChildrenNodes

public void setChildrenNodes(List<ConsistentHashingNode> childrenNodes)

getFilename

public String getFilename()

toBytes

public byte[] toBytes()
               throws IOException

Throws:

IOException

fromBytes

public static HoodieConsistentHashingMetadata fromBytes(byte[] bytes)
                                                 throws IOException

Throws:

IOException

fromJsonString

protected static <T> T fromJsonString(String jsonStr,
                                      Class<T> clazz)
                               throws Exception

Throws:

Exception

getTimestampFromFile

public static String getTimestampFromFile(String filename)

Get instant time from the hashing metadata filename Pattern of the filename: .HASHING_METADATA_FILE_SUFFIX