com.sleepycat.je.log.entry

Class OldBINDeltaLogEntry

java.lang.Object

com.sleepycat.je.log.entry.SingleItemEntry<OldBINDelta>

com.sleepycat.je.log.entry.OldBINDeltaLogEntry

All Implemented Interfaces:

INContainingEntry, LogEntry, Cloneable

public class OldBINDeltaLogEntry
extends SingleItemEntry<OldBINDelta>
implements INContainingEntry

Before log version 9, this was used to hold a OldBINDelta that can be combined with a BIN when fetched from the log; see getResolvedItem. This class was replaced by BINDeltaLogEntry in log version 9, which can be used to create a live (but incomplete) BIN in the Btree.

Constructor Summary

Constructors

Constructor and Description
OldBINDeltaLogEntry(Class<OldBINDelta> logClass)

Method Summary

Modifier and Type	Method and Description
LogEntry	clone()
DatabaseId	getDbId()
IN	getIN(DatabaseImpl dbImpl) Currently used by recovery only.
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()
long	getPrevDeltaLsn()
long	getPrevFullLsn()
Object	getResolvedItem(DatabaseImpl dbImpl) Resolve a BIN-delta item by fetching the full BIN and merging the delta.
boolean	isBINDelta()
boolean	isDeleted() Returns whether this is a deleted LN.
boolean	isImmediatelyObsolete(DatabaseImpl dbImpl) Returns true if this item should be counted as obsolete when logged.
void	postFetchInit(DatabaseImpl dbImpl)
void	postLogWork(LogEntryHeader header, long justLoggedLsn, VLSN vlsn) Do any processing we need to do after logging, while under the logging latch.
void	setLogType(LogEntryType entryType) Inform a BaseEntry instance of its corresponding LogEntryType.
String	toString()

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

create, create, dumpEntry, dumpRep, getMainItem, getSize, getTransactionId, logicalEquals, readEntry, writeEntry

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, isDeleted, isImmediatelyObsolete, postLogWork, setLogType

Constructor Detail

OldBINDeltaLogEntry

public OldBINDeltaLogEntry(Class<OldBINDelta> logClass)

Method Detail

isBINDelta

public boolean isBINDelta()

Specified by:

isBINDelta in interface INContainingEntry

getResolvedItem

public Object getResolvedItem(DatabaseImpl dbImpl)

Resolve a BIN-delta item by fetching the full BIN and merging the delta.

Specified by:

getResolvedItem in interface LogEntry

getIN

public IN getIN(DatabaseImpl dbImpl)

Description copied from interface: INContainingEntry

Currently used by recovery only. For an OldBINDeltaEntry it merges the delta with the last full BIN and returns the new full BIN. For a new BINDeltaLogEntry, it just returns the delta. And for an INLogEntry it just returns the (full) IN.

Specified by:

getIN in interface INContainingEntry

getDbId

public DatabaseId getDbId()

Specified by:

getDbId in interface INContainingEntry

Specified by:

getDbId in interface LogEntry

Overrides:

getDbId in class SingleItemEntry<OldBINDelta>

Returns:

the ID of the database containing this entry, or null if this entry type is not part of a database.

getPrevFullLsn

public long getPrevFullLsn()

Specified by:

getPrevFullLsn in interface INContainingEntry

Returns:

the LSN of the prior full version of this node, or NULL_LSN if no prior full version. Used for counting the prior version as obsolete. If the offset of the LSN is zero, only the file number is known because we read a version 1 log entry.

getPrevDeltaLsn

public long getPrevDeltaLsn()

Specified by:

getPrevDeltaLsn in interface INContainingEntry

Returns:

the LSN of the prior delta version of this node, or NULL_LSN if the prior version is a full version. Used for counting the prior version as obsolete. If the offset of the LSN is zero, only the file number is known because we read a version 1 log 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

isImmediatelyObsolete

public boolean isImmediatelyObsolete(DatabaseImpl dbImpl)

Description copied from interface: LogEntry

Returns true if this item should be counted as obsolete when logged.

Specified by:

isImmediatelyObsolete in interface LogEntry

isDeleted

public boolean isDeleted()

Description copied from interface: LogEntry

Returns whether this is a deleted LN.

Specified by:

isDeleted in interface LogEntry

postLogWork

public void postLogWork(LogEntryHeader header,
                        long justLoggedLsn,
                        VLSN vlsn)

Do any processing we need to do after logging, while under the logging latch.

Specified by:

postLogWork in interface LogEntry

Throws:

DatabaseException - from subclasses.

postFetchInit

public void postFetchInit(DatabaseImpl dbImpl)

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