com.sleepycat.je.tree
Class DBIN

java.lang.Object
  com.sleepycat.je.tree.Node
      com.sleepycat.je.tree.IN
          com.sleepycat.je.tree.BIN
              com.sleepycat.je.tree.DBIN

All Implemented Interfaces:

Loggable, java.lang.Comparable<IN>

public final class DBIN
extends BIN
implements Loggable

A DBIN represents an Duplicate Bottom Internal Node in the JE tree.

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

Constructor Summary

DBIN()

DBIN(DatabaseImpl db, byte[] identifierKey, int maxEntriesPerNode, byte[] dupKey, int level)

Method Summary

java.lang.String	beginTag()
protected boolean	canBeAncestor(boolean targetContainsDuplicates)
protected long	computeMemorySize() Count up the memory usage attributable to this node alone.
static long	computeOverhead(DbConfigManager configManager)
boolean	containsDuplicates()
protected IN	createNewInstance(byte[] identifierKey, int maxEntries, int level) Create a new DBIN.
BINReference	createReference() Create a holder object that encapsulates information about this BIN for the INCompressor.
protected void	dumpLogAdditional(java.lang.StringBuffer sb) DBINS need to dump their dup key
java.lang.String	dumpString(int nSpaces, boolean dumpTags) For unit test support:
java.lang.String	endTag()
protected int	generateLevel(DatabaseId dbId, int newLevel)
byte[]	getChildKey(IN child) Get the key (dupe or identifier) in child that is used to locate it in 'this' node.
byte[]	getDupKey() Return the key for this duplicate set.
byte[]	getDupTreeKey() Return the key for navigating through the duplicate tree.
java.util.Comparator<byte[]>	getKeyComparator() Return the comparator function to be used for DBINs.
int	getLogSize()
LogEntryType	getLogType()
byte[]	getMainTreeKey() Return the key for navigating through the main tree.
protected long	getMemoryOverhead(MemoryBudget mb)
void	readFromLog(java.nio.ByteBuffer itemBuffer, byte entryVersion) Initialize this object from the data in itemBuf.
byte[]	selectKey(byte[] mainTreeKey, byte[] dupTreeKey)
java.lang.String	shortClassName()
void	writeToLog(java.nio.ByteBuffer logBuffer) Serialize this object into the buffer.

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

addCursor, afterLog, beforeLog, clearKnownDeleted, compress, descendOnParentSearch, evictLN, evictLNs, getCursorSet, getLastDeltaVersion, getTreeAdminMemorySize, isCompressible, logDirtyChildren, nCursors, removeCursor, setKnownDeleted, setKnownDeletedLeaveTarget, setProhibitNextDelta, verifyCursors

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

clearLsn, clearPendingDeleted, compareTo, computeArraysOverhead, deleteEntry, dumpLog, equals, fetchTarget, findEntry, getBudgetedMemorySize, getDatabase, getDatabaseId, getDirty, getEntryInMemorySize, getEvictionType, getGeneration, getIdentifierKey, getInListResident, getInMemorySize, getKey, getLastFullVersion, getLevel, getLsn, getMigrate, getNEntries, getRecalcToggle, getState, getTarget, hashCode, init, initMemorySize, insertEntry, insertEntry1, isDbRoot, isEntryKnownDeleted, isEntryPendingDeleted, isEvictable, isKeyInBounds, isLatchOwnerForRead, isLatchOwnerForWrite, isRoot, isSoughtNode, latch, latch, latchNoWait, latchNoWait, latchShared, latchShared, log, log, log, logicalEquals, needsSplitting, optionalLog, optionalLogProvisional, postFetchInit, postRecoveryInit, releaseLatch, releaseLatchIfOwner, setDatabase, setDirty, setEntry, setGeneration, setGeneration, setInListResident, setMigrate, setPendingDeleted, setRecalcToggle, splitInternal, toString, updateEntry, updateEntry, updateEntry, updateMemorySize, updateMemorySize, updateNode, updateNode, updateNode, verify, verifyMemorySize

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

dump, getMemorySizeIncludedByParent, getNodeId, getTransactionId, getType, shortDescription

Methods inherited from class java.lang.Object

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

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

dumpLog, getTransactionId, logicalEquals

Constructor Detail

DBIN

public DBIN()

DBIN

public DBIN(DatabaseImpl db,
            byte[] identifierKey,
            int maxEntriesPerNode,
            byte[] dupKey,
            int level)

Method Detail

createNewInstance

protected IN createNewInstance(byte[] identifierKey,
                               int maxEntries,
                               int level)

Create a new DBIN. Need this because we can't call newInstance() without getting a 0 node.

Overrides:

createNewInstance in class BIN

generateLevel

protected int generateLevel(DatabaseId dbId,
                            int newLevel)

Overrides:

generateLevel in class IN

getKeyComparator

public final java.util.Comparator<byte[]> getKeyComparator()

Return the comparator function to be used for DBINs. This is the user defined duplicate comparison function, if defined.

Overrides:

getKeyComparator in class BIN

getDupKey

public byte[] getDupKey()

Return the key for this duplicate set.

Overrides:

getDupKey in class IN

getChildKey

public byte[] getChildKey(IN child)
                   throws DatabaseException

Get the key (dupe or identifier) in child that is used to locate it in 'this' node.

Overrides:

getChildKey in class BIN

Throws:

DatabaseException

selectKey

public byte[] selectKey(byte[] mainTreeKey,
                        byte[] dupTreeKey)

Overrides:

selectKey in class IN

getDupTreeKey

public byte[] getDupTreeKey()

Return the key for navigating through the duplicate tree.

Overrides:

getDupTreeKey in class IN

getMainTreeKey

public byte[] getMainTreeKey()

Return the key for navigating through the main tree.

Overrides:

getMainTreeKey in class IN

containsDuplicates

public boolean containsDuplicates()

Overrides:

containsDuplicates in class Node

Returns:

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

createReference

public BINReference createReference()

Description copied from class: BIN

Create a holder object that encapsulates information about this BIN for the INCompressor.

Overrides:

createReference in class BIN

computeMemorySize

protected long computeMemorySize()

Count up the memory usage attributable to this node alone.

Overrides:

computeMemorySize in class IN

computeOverhead

public static long computeOverhead(DbConfigManager configManager)
                            throws DatabaseException

Throws:

DatabaseException

getMemoryOverhead

protected long getMemoryOverhead(MemoryBudget mb)

Overrides:

getMemoryOverhead in class BIN

canBeAncestor

protected boolean canBeAncestor(boolean targetContainsDuplicates)

Overrides:

canBeAncestor in class BIN

Returns:

true if you can be the ancestor of the target IN. Currently the determining factor is whether the target IN contains duplicates.

beginTag

public java.lang.String beginTag()

Overrides:

beginTag in class BIN

endTag

public java.lang.String endTag()

Overrides:

endTag in class BIN

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 IN, without

getLogType

public LogEntryType getLogType()

Overrides:

getLogType in class BIN

See Also:

Node.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:

Loggable.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:

Loggable.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 IN

Throws:

LogException

See Also:

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

dumpLogAdditional

protected void dumpLogAdditional(java.lang.StringBuffer sb)

DBINS need to dump their dup key

Overrides:

dumpLogAdditional in class IN

shortClassName

public java.lang.String shortClassName()

Overrides:

shortClassName in class BIN