Package com.mapr.kvstore

Class InMemoryKvTable<T>

java.lang.Object

com.mapr.kvstore.InMemoryKvTable<T>

All Implemented Interfaces:

KvTable<T>

public class InMemoryKvTable<T>
extends Object
implements KvTable<T>

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	InMemoryKvTable.InMemoryKvTableScanner

Constructor Summary

Constructors

Constructor	Description
InMemoryKvTable()

Method Summary

Modifier and Type	Method	Description
void	close()
com.google.protobuf.ByteString	delete(T key)
boolean	exists(T keyValue)	Cognate of KvTable.lookup(Object, boolean), this function checks for the presence of an entry with a specific key.
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)
String	getTableName()
com.google.protobuf.ByteString	insert(T key, com.google.protobuf.ByteString value)
byte[]	lookup(T keyValue)
byte[]	lookup(T keyValue, boolean allowStaleRead)
com.mapr.fs.proto.Fileserver.KvstoreLookupNearResponse	lookupNear(T key)
int	open(String name)	Initializes in-memory state of the table, such as setting key type (where necessary).
void	setType(int type)
void	setVarKeyType(String type)

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.mapr.kvstore.KvTable

getHashedStringScanner, isExistCollisionKey, lookupCollisionNr

Constructor Details

InMemoryKvTable

public InMemoryKvTable()

Method Details

getKvVersion

public long getKvVersion()

Specified by:

getKvVersion in interface KvTable<T>

open

public int open(String name)

Description copied from interface: KvTable

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

Specified by:

open in interface KvTable<T>

Parameters:

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

Returns:

close

public void close()

Specified by:

close in interface KvTable<T>

getTableName

public String getTableName()

Specified by:

getTableName in interface KvTable<T>

setVarKeyType

public void setVarKeyType(String type)

Specified by:

setVarKeyType in interface KvTable<T>

lookup

public byte[] lookup(T keyValue)

Specified by:

lookup in interface KvTable<T>

lookup

public byte[] lookup(T keyValue,
 boolean allowStaleRead)

Specified by:

lookup in interface KvTable<T>

exists

public boolean exists(T keyValue)

Description copied from interface: KvTable

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

Specified by:

exists in interface KvTable<T>

Returns:

getLeftNearValue

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

Specified by:

getLeftNearValue in interface KvTable<T>

getRightNearValue

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

Specified by:

getRightNearValue in interface KvTable<T>

lookupNear

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

Specified by:

lookupNear in interface KvTable<T>

Throws:

KvStoreException

getMinKey

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

Specified by:

getMinKey in interface KvTable<T>

getMaxKey

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

Specified by:

getMaxKey in interface KvTable<T>

getKeyCnt

public int getKeyCnt()

Specified by:

getKeyCnt in interface KvTable<T>

getKeyFromKvStoreKey

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

Specified by:

getKeyFromKvStoreKey in interface KvTable<T>

getScanner

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

Specified by:

getScanner in interface KvTable<T>

getScanner

public KvTableScanner getScanner(T startKey,
 boolean keysOnly)

Specified by:

getScanner in interface KvTable<T>

getScanner

public KvTableScanner getScanner(boolean keysOnly)

Specified by:

getScanner in interface KvTable<T>

setType

public void setType(int type)

Specified by:

setType in interface KvTable<T>

insert

public com.google.protobuf.ByteString insert(T key,
 com.google.protobuf.ByteString value)

delete

public com.google.protobuf.ByteString delete(T key)