com.sleepycat.je.log.entry

Class EmptyLogEntry

java.lang.Object

com.sleepycat.je.log.entry.EmptyLogEntry

All Implemented Interfaces:

Loggable

public class EmptyLogEntry
extends Object
implements Loggable

Contains no information, implying that the LogEntryType is the only information needed.

A single byte is actually written, but this is only to satisfy non-null buffer dependencies in ChecksumValidator and file readers.

Constructor Summary

Constructors

Constructor and Description
EmptyLogEntry()

Method Summary

Modifier and Type	Method and Description
void	dumpLog(StringBuilder sb, boolean verbose) Write the object into the string buffer for log dumping.
int	getLogSize()
long	getTransactionId()
boolean	logicalEquals(Loggable other) Always return false, this item should never be compared.
void	readFromLog(ByteBuffer logBuffer, int entryVersion) Initialize this object from the data in itemBuf.
void	writeToLog(ByteBuffer logBuffer) Serialize this object into the buffer.

Methods inherited from class java.lang.Object

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

Constructor Detail

EmptyLogEntry

public EmptyLogEntry()

Method Detail

getLogSize

public int getLogSize()

Specified by:

getLogSize in interface Loggable

Returns:

number of bytes used to store this object.

writeToLog

public void writeToLog(ByteBuffer logBuffer)

Description copied from interface: Loggable

Serialize this object into the buffer.

Specified by:

writeToLog in interface Loggable

Parameters:

logBuffer - is the destination buffer

readFromLog

public void readFromLog(ByteBuffer logBuffer,
                        int entryVersion)

Description copied from interface: Loggable

Initialize this object from the data in itemBuf.

Specified by:

readFromLog in interface Loggable

Parameters:

logBuffer - the source buffer

entryVersion - the log version of the data

dumpLog

public void dumpLog(StringBuilder sb,
                    boolean verbose)

Description copied from interface: Loggable

Write the object into the string buffer for log dumping. Each object should be dumped without indentation or new lines and should be valid XML.

Specified by:

dumpLog in interface Loggable

Parameters:

sb - destination string buffer

verbose - if true, dump the full, verbose version

logicalEquals

public boolean logicalEquals(Loggable other)

Always return false, this item should never be compared.

Specified by:

logicalEquals in interface Loggable

Returns:

true if these two loggable items are logically the same. Used for replication testing.

getTransactionId

public long getTransactionId()

Specified by:

getTransactionId in interface Loggable

Returns:

the transaction id embedded within this loggable object. Objects that have no transaction id should return 0.