com.sleepycat.je.utilint

Class Matchpoint

java.lang.Object

com.sleepycat.je.utilint.Matchpoint

All Implemented Interfaces:

Loggable

public class Matchpoint
extends java.lang.Object
implements Loggable

This class writes out a log entry that can be used for replication syncup. It can be issued arbitrarily by the master at any point, in order to bound the syncup interval in much the way that a checkpoint bounds the recovery interval. The entry will a replicated one, which means that it will be tagged with a VLSN. Although this is a replication class, it resides in the utilint package because it is referenced in LogEntryType.java. TODO: This is currently not used. When it is used, it will be the first replicated log entry that does not have a real txn id. All replicated entries are expected to have negative ids, and the matchpoint should be exempt from Replay.updateSequences, or it should pass in a special reserved negative id, so as not to incur the assertion in Replay.updateSequences, that the txn id is <0.

Constructor Summary

Constructors

Constructor and Description
Matchpoint() For constructing from the log.
Matchpoint(int repMasterNodeId)

Method Summary

Methods

Modifier and Type	Method and Description
void	dumpLog(java.lang.StringBuilder sb, boolean verbose) Write the object into the string buffer for log dumping.
int	getLogSize()
int	getMasterNodeId()
long	getTransactionId()
boolean	logicalEquals(Loggable other)
void	readFromLog(java.nio.ByteBuffer logBuffer, int entryVersion) Initialize this object from the data in itemBuf.
void	writeToLog(java.nio.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

Matchpoint

public Matchpoint(int repMasterNodeId)

Matchpoint

public Matchpoint()

For constructing from the log.

Method Detail

getMasterNodeId

public int getMasterNodeId()

getLogSize

public int getLogSize()

Specified by:

getLogSize in interface Loggable

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

Parameters:

logBuffer - is the destination buffer

See Also:

Loggable.writeToLog(java.nio.ByteBuffer)

readFromLog

public void readFromLog(java.nio.ByteBuffer logBuffer,
               int entryVersion)

Description copied from interface: Loggable

Initialize this object from the data in itemBuf.

Specified by:

readFromLog in interface Loggable

See Also:

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

dumpLog

public void dumpLog(java.lang.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

See Also:

Loggable.dumpLog(java.lang.StringBuilder, boolean)

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.

See Also:

Loggable.getTransactionId()

logicalEquals

public boolean logicalEquals(Loggable other)

Specified by:

logicalEquals in interface Loggable

Returns:

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