com.sleepycat.je.log.entry

Class DeletedDupLNLogEntry

java.lang.Object

com.sleepycat.je.log.entry.LNLogEntry<LN>

com.sleepycat.je.log.entry.DeletedDupLNLogEntry

All Implemented Interfaces:

LogEntry, ReplicableLogEntry, Cloneable

public class DeletedDupLNLogEntry
extends LNLogEntry<LN>

DupDeletedLNEntry encapsulates a deleted dupe LN entry. This contains all the regular transactional LN log entry fields and an extra key, which is the nulled out data field of the LN (which becomes the key in the duplicate tree. WARNING: Obsolete in version 8, only used by some log readers. TODO Move to dupConvert package, after testing is complete.

Field Summary

Fields inherited from class com.sleepycat.je.log.entry.LNLogEntry

MIN_LOG_SIZE

Constructor Summary

Constructors

Constructor and Description
DeletedDupLNLogEntry() Constructor to read an entry.

Method Summary

Modifier and Type	Method and Description
LogEntry	clone()
StringBuilder	dumpEntry(StringBuilder sb, boolean verbose) Extends super class to dump out extra key.
Class<T>	getLogClass() Returns the class of the contained loggable item or items, or null if the instance was created to write an entry.
LogEntryType	getLogType()
Object	getResolvedItem(DatabaseImpl dbImpl) By default, this log entry is complete and does not require fetching additional entries.
int	getSize()
int	getSize(int logVersion, boolean forReplication) Returns the number of bytes needed to store this entry in the format for the specified log version.
boolean	hasReplicationFormat() Returns whether this format has a variant that is optimized for replication.
boolean	isReplicationFormatWorthwhile(ByteBuffer logBuffer, int srcVersion, int destVersion) Returns whether it is worthwhile to materialize and then re-serialize a log entry in a format optimized for replication.
void	readEntry(EnvironmentImpl envImpl, LogEntryHeader header, ByteBuffer entryBuffer) Extends its super class to read in the extra dup key.
void	setLogType(LogEntryType entryType) Inform a BaseEntry instance of its corresponding LogEntryType.
String	toString()
void	writeEntry(ByteBuffer destBuffer) Serialize this object into the buffer.
void	writeEntry(ByteBuffer destBuffer, int logVersion, boolean forReplication) Serializes this object into the specified buffer in the format for the the specified log version.

Methods inherited from class com.sleepycat.je.log.entry.LNLogEntry

countPriorVersionObsolete, create, dumpRep, getAbortData, getAbortExpiration, getAbortKey, getAbortKnownDeleted, getAbortLsn, getAbortVLSN, getData, getDbId, getEmbeddedData, getEmbeddedLoggables, getExpiration, getKey, getLastFormatChange, getLN, getMainItem, getPriorVersionLsn, getPriorVersionSize, getTransactionId, getTxnId, getUnconvertedDataLength, getUnconvertedKeyLength, getUserKeyData, getUserTxn, isAbortExpirationInHours, isDeleted, isEmbeddedLN, isExpirationInHours, isImmediatelyObsolete, logicalEquals, postFetchInit, postFetchInit, postLogWork

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.sleepycat.je.log.entry.LogEntry

clone, getLogType, getResolvedItem, setLogType

Constructor Detail

DeletedDupLNLogEntry

public DeletedDupLNLogEntry()

Constructor to read an entry.

Method Detail

readEntry

public void readEntry(EnvironmentImpl envImpl,
                      LogEntryHeader header,
                      ByteBuffer entryBuffer)

Extends its super class to read in the extra dup key.

Specified by:

readEntry in interface LogEntry

Overrides:

readEntry in class LNLogEntry<LN>

dumpEntry

public StringBuilder dumpEntry(StringBuilder sb,
                               boolean verbose)

Extends super class to dump out extra key.

Specified by:

dumpEntry in interface LogEntry

Overrides:

dumpEntry in class LNLogEntry<LN>

hasReplicationFormat

public boolean hasReplicationFormat()

Description copied from interface: ReplicableLogEntry

Returns whether this format has a variant that is optimized for replication.

Specified by:

hasReplicationFormat in interface ReplicableLogEntry

Overrides:

hasReplicationFormat in class LNLogEntry<LN>

isReplicationFormatWorthwhile

public boolean isReplicationFormatWorthwhile(ByteBuffer logBuffer,
                                             int srcVersion,
                                             int destVersion)

Description copied from interface: ReplicableLogEntry

Returns whether it is worthwhile to materialize and then re-serialize a log entry in a format optimized for replication. Implementations should attempt to check efficiently, without instantiating the log entry object. Some implementations will simply return false.

WARNING: The logBuffer position must not be changed by this method.

WARNING: The shared LogEntry object is used for calling this method, and this method must not change any of the fields in the object.

Specified by:

isReplicationFormatWorthwhile in interface ReplicableLogEntry

Overrides:

isReplicationFormatWorthwhile in class LNLogEntry<LN>

Parameters:

logBuffer - contains the entry that would be re-serialized.

srcVersion - the log version of entry in logBuffer.

destVersion - the version that would be used for re-serialization.

getSize

public int getSize(int logVersion,
                   boolean forReplication)

Description copied from interface: ReplicableLogEntry

Returns the number of bytes needed to store this entry in the format for the specified log version. Earlier log versions only need to be supported for log entries with format changes made in LogEntryType.LOG_VERSION_REPLICATE_OLDER or greater.

Specified by:

getSize in interface ReplicableLogEntry

Overrides:

getSize in class LNLogEntry<LN>

Parameters:

logVersion - the log version

forReplication - whether the entry will be sent over the wire, and not written to the log.

Returns:

the number of bytes to store this entry for the log version

writeEntry

public void writeEntry(ByteBuffer destBuffer,
                       int logVersion,
                       boolean forReplication)

Description copied from interface: ReplicableLogEntry

Serializes this object into the specified buffer in the format for the the specified log version. Earlier log versions only need to be supported for log entries with format changes made in LogEntryType.LOG_VERSION_REPLICATE_OLDER or greater.

Specified by:

writeEntry in interface ReplicableLogEntry

Overrides:

writeEntry in class LNLogEntry<LN>

Parameters:

destBuffer - the destination buffer

logVersion - the log version

forReplication - whether the entry will be sent over the wire, and not written to the log.

writeEntry

public void writeEntry(ByteBuffer destBuffer)

Description copied from interface: LogEntry

Serialize this object into the buffer.

Specified by:

writeEntry in interface LogEntry

Parameters:

destBuffer - is the destination buffer

getSize

public int getSize()

Specified by:

getSize in interface LogEntry

Returns:

size of byte buffer needed to store this entry.

getLogClass

public Class<T> getLogClass()

Returns the class of the contained loggable item or items, or null if the instance was created to write an entry.

Returns:

the loggable class or null

setLogType

public void setLogType(LogEntryType entryType)

Inform a BaseEntry instance of its corresponding LogEntryType.

Specified by:

setLogType in interface LogEntry

getLogType

public LogEntryType getLogType()

Specified by:

getLogType in interface LogEntry

Returns:

the type of log entry

getResolvedItem

public Object getResolvedItem(DatabaseImpl dbImpl)

By default, this log entry is complete and does not require fetching additional entries. This method is overridden by BINDeltaLogEntry.

Specified by:

getResolvedItem in interface LogEntry

clone

public LogEntry clone()

Specified by:

clone in interface LogEntry

Overrides:

clone in class Object

Returns:

a shallow clone.

toString

public String toString()

Overrides:

toString in class Object