com.sleepycat.je.tree.dupConvert

Class DupCountLN

java.lang.Object

com.sleepycat.je.tree.Node

com.sleepycat.je.tree.LN

com.sleepycat.je.tree.dupConvert.DupCountLN

All Implemented Interfaces:

Loggable, VersionedWriteLoggable

public final class DupCountLN
extends LN

A DupCountLN represents the transactional part of the root of a duplicate tree, specifically the count of dupes in the tree. Obsolete in log version 8, only used by DupConvert and some log readers.

Field Summary

Fields inherited from class com.sleepycat.je.tree.Node

NULL_NODE_ID

Constructor Summary

Constructors

Constructor and Description
DupCountLN() Create an empty DupCountLN, to be filled in from the log.

Method Summary

Modifier and Type	Method and Description
String	beginTag()
boolean	containsDuplicates() Since DIN/DBIN/DupCountLN are no longer used in the Btree, this method should normally only be used by dup conversion or entities that do not access records via the Btree.
protected void	dumpLogAdditional(StringBuilder sb, boolean verbose) Dump additional fields
String	dumpString(int nSpaces, boolean dumpTags)
String	endTag()
int	getDupCount()
int	getLogSize()
protected LogEntryType	getLogType(boolean isInsert, boolean isTransactional, DatabaseImpl db) Return the correct log entry type for a DupCountLN depends on whether it's transactional.
long	getMemorySizeIncludedByParent() Compute the approximate size of this node in memory for evictor invocation purposes.
boolean	isDeleted()
boolean	logicalEquals(Loggable other)
void	readFromLog(ByteBuffer itemBuffer, int entryVersion) Initialize this object from the data in itemBuf.
String	toString() Default toString method at the root of the tree.
void	writeToLog(ByteBuffer logBuffer) Serialize this object into the buffer.

Methods inherited from class com.sleepycat.je.tree.LN

addExtraMarshaledMemorySize, clearDirty, copyEntryData, delete, dumpKey, dumpLog, getData, getEmbeddedLoggables, getFetchedCold, getGenericLogType, getLastFormatChange, getLogSize, getVLSNSequence, hasReplicationFormat, isDirty, isLN, isReplicationFormatWorthwhile, log, makeLN, makeLN, modify, optionalLog, postFetchInit, resolvePartialEntry, setDirty, setEmpty, setEntry, setEntry, setEntry, setFetchedCold, setVLSNSequence, writeToLog

Methods inherited from class com.sleepycat.je.tree.Node

dump, getLevel, getTransactionId, getType, isBIN, isBINDelta, isBINDelta, isDBIN, isDIN, isIN, isUpperIN, latch, latchShared, latchShared, releaseLatch

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.sleepycat.je.log.Loggable

getTransactionId

Constructor Detail

DupCountLN

public DupCountLN()

Create an empty DupCountLN, to be filled in from the log.

Method Detail

getDupCount

public int getDupCount()

containsDuplicates

public boolean containsDuplicates()

Description copied from class: Node

Since DIN/DBIN/DupCountLN are no longer used in the Btree, this method should normally only be used by dup conversion or entities that do not access records via the Btree.

Overrides:

containsDuplicates in class Node

Returns:

true if this node is a duplicate-bearing node type, false if otherwise.

isDeleted

public boolean isDeleted()

Overrides:

isDeleted in class LN

getMemorySizeIncludedByParent

public long getMemorySizeIncludedByParent()

Compute the approximate size of this node in memory for evictor invocation purposes.

Overrides:

getMemorySizeIncludedByParent in class LN

toString

public String toString()

Description copied from class: Node

Default toString method at the root of the tree.

Overrides:

toString in class Node

beginTag

public String beginTag()

Overrides:

beginTag in class LN

endTag

public String endTag()

Overrides:

endTag in class LN

dumpString

public String dumpString(int nSpaces,
                         boolean dumpTags)

Overrides:

dumpString in class LN

getLogType

protected LogEntryType getLogType(boolean isInsert,
                                  boolean isTransactional,
                                  DatabaseImpl db)

Return the correct log entry type for a DupCountLN depends on whether it's transactional.

Overrides:

getLogType in class LN

getLogSize

public int getLogSize()

Specified by:

getLogSize in interface Loggable

Overrides:

getLogSize in class LN

Returns:

number of bytes used to store this object.

See Also:

LN.getLogSize()

writeToLog

public void writeToLog(ByteBuffer logBuffer)

Description copied from interface: Loggable

Serialize this object into the buffer.

Specified by:

writeToLog in interface Loggable

Overrides:

writeToLog in class LN

Parameters:

logBuffer - is the destination buffer

See Also:

LN.writeToLog(java.nio.ByteBuffer)

readFromLog

public void readFromLog(ByteBuffer itemBuffer,
                        int entryVersion)

Description copied from interface: Loggable

Initialize this object from the data in itemBuf.

Specified by:

readFromLog in interface Loggable

Overrides:

readFromLog in class LN

Parameters:

itemBuffer - the source buffer

entryVersion - the log version of the data

See Also:

LN.readFromLog(java.nio.ByteBuffer, int)

logicalEquals

public boolean logicalEquals(Loggable other)

Specified by:

logicalEquals in interface Loggable

Overrides:

logicalEquals in class LN

Returns:

true if these two loggable items are logically the same. Used for replication testing.

See Also:

DupCountLNs are never replicated.

dumpLogAdditional

protected void dumpLogAdditional(StringBuilder sb,
                                 boolean verbose)

Dump additional fields

Overrides:

dumpLogAdditional in class LN