Package com.mapr.kvstore

Interface KvTable<T>

All Known Implementing Classes:

HashedStringKvStore, InMemoryByteStringKvTable, InMemoryKvTable, KvStore

public interface KvTable<T>

Method Summary

Modifier and Type	Method	Description
void	close()
boolean	exists(T keyValue)	Cognate of lookup(Object, boolean), this function checks for the presence of an entry with a specific key.
default KvTableScanner	getHashedStringScanner()
int	getKeyCnt()
T	getKeyFromKvStoreKey(com.mapr.fs.proto.Fileserver.KvStoreKey key)
long	getKvVersion()
com.mapr.fs.proto.Fileserver.KvMsg	getLeftNearValue(T key)
com.mapr.fs.proto.Fileserver.KvStoreKey	getMaxKey()
com.mapr.fs.proto.Fileserver.KvStoreKey	getMinKey()
com.mapr.fs.proto.Fileserver.KvMsg	getRightNearValue(T key)
KvTableScanner	getScanner(boolean keysOnly)
KvTableScanner	getScanner(T startKey, boolean keysOnly)
KvTableScanner	getScanner(T startKey, T endKey, boolean keysOnly)
java.lang.String	getTableName()
default boolean	isExistCollisionKey()
byte[]	lookup(T keyValue)
byte[]	lookup(T keyValue, boolean allowStaleRead)
default long	lookupCollisionNr()
com.mapr.fs.proto.Fileserver.KvstoreLookupNearResponse	lookupNear(T key)
int	open(java.lang.String name)	Initializes in-memory state of the table, such as setting key type (where necessary).
void	setType(int type)
void	setVarKeyType(java.lang.String type)

Method Detail

open

int open(java.lang.String name)

Initializes in-memory state of the table, such as setting key type (where necessary).

Parameters:

name - name of the key-value table to be initialized

Returns:

close

void close()

lookup

byte[] lookup(T keyValue)

lookup

byte[] lookup(T keyValue,
              boolean allowStaleRead)

exists

boolean exists(T keyValue)

Cognate of lookup(Object, boolean), this function checks for the presence of an entry with a specific key.

Parameters:

keyValue -

Returns:

getTableName

java.lang.String getTableName()

getLeftNearValue

com.mapr.fs.proto.Fileserver.KvMsg getLeftNearValue(T key)

getRightNearValue

com.mapr.fs.proto.Fileserver.KvMsg getRightNearValue(T key)

lookupNear

com.mapr.fs.proto.Fileserver.KvstoreLookupNearResponse lookupNear(T key)
                                                           throws KvStoreException

Throws:

KvStoreException

getMinKey

com.mapr.fs.proto.Fileserver.KvStoreKey getMinKey()

getMaxKey

com.mapr.fs.proto.Fileserver.KvStoreKey getMaxKey()

getKeyCnt

int getKeyCnt()

getKvVersion

long getKvVersion()

setVarKeyType

void setVarKeyType(java.lang.String type)

getKeyFromKvStoreKey

T getKeyFromKvStoreKey(com.mapr.fs.proto.Fileserver.KvStoreKey key)

getScanner

KvTableScanner getScanner(T startKey,
                          T endKey,
                          boolean keysOnly)

getScanner

KvTableScanner getScanner(T startKey,
                          boolean keysOnly)

getScanner

KvTableScanner getScanner(boolean keysOnly)

setType

void setType(int type)

getHashedStringScanner

default KvTableScanner getHashedStringScanner()

lookupCollisionNr

default long lookupCollisionNr()

isExistCollisionKey

default boolean isExistCollisionKey()