com.sleepycat.je.tree

Class DupCountLN

java.lang.Object

com.sleepycat.je.tree.Node

com.sleepycat.je.tree.LN

com.sleepycat.je.tree.DupCountLN

All Implemented Interfaces:

Loggable

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.

Constructor Summary

Constructors

Constructor and Description
DupCountLN() Create an empty DupCountLN, to be filled in from the log.
DupCountLN(EnvironmentImpl envImpl, int count) Create a new DupCountLn to hold a new DIN.

Method Summary

Methods

Modifier and Type	Method and Description
void	accumulateStats(TreeWalkerStatsAccumulator acc)
java.lang.String	beginTag()
boolean	containsDuplicates()
int	decDupCount()
protected void	dumpLogAdditional(java.lang.StringBuffer sb, boolean verbose) Dump additional fields
java.lang.String	dumpString(int nSpaces, boolean dumpTags)
java.lang.String	endTag()
int	getDupCount()
int	getLogSize()
LogEntryType	getLogType()
long	getMemorySizeIncludedByParent() Compute the approximate size of this node in memory for evictor invocation purposes.
protected LogEntryType	getTransactionalLogType() Log type for transactional entries.
int	incDupCount()
boolean	isDeleted()
boolean	logicalEquals(Loggable other)
void	readFromLog(java.nio.ByteBuffer itemBuffer, byte entryVersion) Initialize this object from the data in itemBuf.
(package private) void	setDupCount(int dupCount)
java.lang.String	toString() Default toString method at the root of the tree.
void	writeToLog(java.nio.ByteBuffer logBuffer) Serialize this object into the buffer.

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

accountForSubtreeRemoval, canBeAncestor, copyData, createLogEntry, delete, dumpLog, getData, getLastLoggedSize, isDirty, isEvictable, isEvictableInexact, isSoughtNode, isValidForDelete, log, log, makeDeleted, modify, optionalLog, optionalLogProvisional, rebuildINList, releaseMemoryBudget, setDirty, setLastLoggedSize

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

dump, getLevel, getNodeId, getTransactionId, getType, latchShared, latchShared, matchLNByNodeId, postFetchInit, releaseLatch, setNodeId, shortDescription, verify

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(EnvironmentImpl envImpl,
          int count)

Create a new DupCountLn to hold a new DIN.

DupCountLN

public DupCountLN()

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

Method Detail

getDupCount

public int getDupCount()

incDupCount

public int incDupCount()

decDupCount

public int decDupCount()

setDupCount

void setDupCount(int dupCount)

containsDuplicates

public boolean containsDuplicates()

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

accumulateStats

public void accumulateStats(TreeWalkerStatsAccumulator acc)

toString

public java.lang.String toString()

Description copied from class: Node

Default toString method at the root of the tree.

Overrides:

toString in class Node

beginTag

public java.lang.String beginTag()

Overrides:

beginTag in class LN

endTag

public java.lang.String endTag()

Overrides:

endTag in class LN

dumpString

public java.lang.String dumpString(int nSpaces,
                          boolean dumpTags)

Overrides:

dumpString in class LN

getTransactionalLogType

protected LogEntryType getTransactionalLogType()

Log type for transactional entries.

Overrides:

getTransactionalLogType in class LN

getLogType

public LogEntryType getLogType()

Overrides:

getLogType in class LN

See Also:

Node.getLogType()

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(java.nio.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(java.nio.ByteBuffer itemBuffer,
               byte entryVersion)
                 throws LogException

Description copied from interface: Loggable

Initialize this object from the data in itemBuf.

Specified by:

readFromLog in interface Loggable

Overrides:

readFromLog in class LN

Throws:

LogException

See Also:

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

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(java.lang.StringBuffer sb,
                     boolean verbose)

Dump additional fields

Overrides:

dumpLogAdditional in class LN