com.sleepycat.je.tree.dupConvert

Class DIN

java.lang.Object

com.sleepycat.je.tree.Node

com.sleepycat.je.tree.IN

com.sleepycat.je.tree.dupConvert.DIN

All Implemented Interfaces:

Loggable, java.lang.Comparable<IN>

public final class DIN
extends IN

An DIN represents an Duplicate Internal Node in the JE tree. Obsolete in log version 8, only used by DupConvert and some log readers.

Field Summary

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

ACCUMULATED_LIMIT, BIN_LEVEL, DBMAP_LEVEL, EXACT_MATCH, INSERT_SUCCESS, latch, LEVEL_MASK, MAIN_LEVEL, MAX_LEVEL, MAY_EVICT_LNS, MAY_EVICT_NODE, MAY_NOT_EVICT, MIN_LEVEL

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

NULL_NODE_ID

Constructor Summary

Constructors

Constructor and Description
DIN() Create an empty DIN, with no node ID, to be filled in from the log.
DIN(SizeofMarker marker) For Sizeof, set all array fields to null, since they are not part of the fixed overhead.

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.String	beginTag()
long	computeMemorySize() Count up the memory usage attributable to this node alone.
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(java.lang.StringBuilder sb) DINS need to dump their dup key
java.lang.String	dumpString(int nSpaces, boolean dumpTags) For unit test support:
java.lang.String	endTag()
DupCountLN	getDupCountLN()
ChildReference	getDupCountLNRef()
protected long	getFixedMemoryOverhead()
int	getLogSize()
LogEntryType	getLogType() Get the log type of this node.
protected boolean	isEvictionProhibited() Returns whether the node is not evictable, irrespective of the status of the children nodes.
protected long	printMemorySize()
void	readFromLog(java.nio.ByteBuffer itemBuffer, int entryVersion) Initialize this object from the data in itemBuf.
java.lang.String	shortClassName()
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.IN

afterLog, beforeLog, clearLsnCompaction, clearPendingDeleted, compactMemory, compareTo, createNewInstance, deleteEntry, dumpLog, equals, fetchTarget, fetchTargetWithExclusiveLatch, findEntry, findEntry, getBudgetedMemorySize, getCompactMaxKeyLength, getDatabase, getDatabaseId, getDirty, getEvictionType, getGeneration, getGenericLogType, getIdentifierKey, getInListResident, getInMemorySize, getKey, getKeyComparator, getKeyVals, getLastDeltaVersion, getLastFullVersion, getLastLoggedVersion, getLatchQueueLength, getLatchString, getLevel, getLsn, getMaxEntries, getMigrate, getNEntries, getNodeId, getRecalcToggle, getState, getTarget, getTargets, getTreeAdminMemorySize, hashCode, incEvictStats, incFetchStats, init, initMemorySize, insertEntry, insertEntry1, isDbRoot, isEntryKnownDeleted, isEntryPendingDeleted, isEvictable, isIN, isKeyInBounds, isLatchOwnerForRead, isLatchOwnerForWrite, isRoot, latch, latch, latchNoWait, latchNoWait, latchShared, latchShared, log, log, log, logDirtyChildren, logicalEquals, needsSplitting, optionalLog, optionalLogProvisional, postFetchInit, postRecoveryInit, prepareForSlotReuse, recalcKeyPrefix, releaseLatch, releaseLatchIfOwner, resetAndGetMemorySize, setDatabase, setDirty, setGeneration, setGeneration, setIdentifierKey, setInListResident, setMigrate, setPendingDeleted, setProhibitNextDelta, setRecalcToggle, splitInternal, updateEntry, updateEntry, updateEntry, updateMemorySize, updateNode, updateNode, updateNode, verify, verifyMemorySize

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

dump, getMemorySizeIncludedByParent, getTransactionId, getType, isBIN, isCompressible, isLN

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

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

getTransactionId

Constructor Detail

DIN

public DIN()

Create an empty DIN, with no node ID, to be filled in from the log.

DIN

public DIN(SizeofMarker marker)

For Sizeof, set all array fields to null, since they are not part of the fixed overhead.

Method Detail

getDupCountLNRef

public ChildReference getDupCountLNRef()

getDupCountLN

public DupCountLN getDupCountLN()
                         throws DatabaseException

Throws:

DatabaseException

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.

computeMemorySize

public long computeMemorySize()

Count up the memory usage attributable to this node alone. LNs children are counted by their BIN/DIN parents, but INs are not counted by their parents because they are resident on the IN list.

Overrides:

computeMemorySize in class IN

printMemorySize

protected long printMemorySize()

Overrides:

printMemorySize in class IN

getFixedMemoryOverhead

protected long getFixedMemoryOverhead()

Overrides:

getFixedMemoryOverhead in class IN

isEvictionProhibited

protected boolean isEvictionProhibited()

Description copied from class: IN

Returns whether the node is not evictable, irrespective of the status of the children nodes. Note that the IN may or may not be latched when this method is called. Returning the wrong answer is OK in that case (it will be called again later when latched), but an exception should not occur.

Overrides:

isEvictionProhibited in class IN

getLogType

public LogEntryType getLogType()

Description copied from class: IN

Get the log type of this node.

Overrides:

getLogType in class IN

See Also:

IN.getLogType()

getLogSize

public int getLogSize()

Specified by:

getLogSize in interface Loggable

Overrides:

getLogSize in class IN

Returns:

number of bytes used to store this object.

See Also:

IN.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 IN

Parameters:

logBuffer - is the destination buffer

See Also:

IN.writeToLog(java.nio.ByteBuffer)

readFromLog

public void readFromLog(java.nio.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 IN

See Also:

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

dumpLogAdditional

protected void dumpLogAdditional(java.lang.StringBuilder sb)

DINS need to dump their dup key

Overrides:

dumpLogAdditional in class IN

beginTag

public java.lang.String beginTag()

Overrides:

beginTag in class IN

endTag

public java.lang.String endTag()

Overrides:

endTag in class IN

dumpString

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

For unit test support:

Overrides:

dumpString in class IN

Returns:

a string that dumps information about this DIN, without

toString

public java.lang.String toString()

Description copied from class: Node

Default toString method at the root of the tree.

Overrides:

toString in class IN

shortClassName

public java.lang.String shortClassName()

Overrides:

shortClassName in class IN