com.sleepycat.je.log

Class CheckpointFileReader

java.lang.Object

com.sleepycat.je.log.FileReader

com.sleepycat.je.log.CheckpointFileReader

public class CheckpointFileReader
extends FileReader

CheckpointFileReader searches for root and checkpoint entries.

Nested Class Summary

Nested classes/interfaces inherited from class com.sleepycat.je.log.FileReader

FileReader.EOFException, FileReader.ReadWindow

Field Summary

Fields inherited from class com.sleepycat.je.log.FileReader

cksumValidator, currentEntryHeader, currentEntryOffset, currentEntryPrevOffset, envImpl, eof, fileManager, forward, logger, nextEntryOffset, startLsn, window

Constructor Summary

Constructors

Constructor and Description
CheckpointFileReader(EnvironmentImpl env, int readBufferSize, boolean forward, long startLsn, long finishLsn, long endOfFileLsn) Create this reader to start at a given LSN.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	isCheckpointEnd()
boolean	isCheckpointStart()
boolean	isDbTree()
protected boolean	isTargetEntry()
protected boolean	processEntry(java.nio.ByteBuffer entryBuffer) This reader instantiates the first object of a given log entry

Methods inherited from class com.sleepycat.je.log.FileReader

entryIsReplicated, getAndResetNReads, getLastEntrySize, getLastLsn, getNRepeatIteratorReads, getNumRead, initStartingPosition, makeWindow, readNextEntry, readNextEntryAllowExceptions, resyncReader, setAlwaysValidateChecksum, setBackwardPosition, setForwardPosition, skipData, skipEntry, threadSafeBufferFlip, threadSafeBufferPosition, threadSafeBufferPosition

Methods inherited from class java.lang.Object

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

Constructor Detail

CheckpointFileReader

public CheckpointFileReader(EnvironmentImpl env,
                    int readBufferSize,
                    boolean forward,
                    long startLsn,
                    long finishLsn,
                    long endOfFileLsn)
                     throws DatabaseException

Create this reader to start at a given LSN.

Throws:

DatabaseException

Method Detail

isTargetEntry

protected boolean isTargetEntry()

Overrides:

isTargetEntry in class FileReader

Returns:

true if this is a targeted entry.

processEntry

protected boolean processEntry(java.nio.ByteBuffer entryBuffer)

This reader instantiates the first object of a given log entry

Specified by:

processEntry in class FileReader

Parameters:

entryBuffer - contains the entry data and is positioned at the data

Returns:

true if this entry should be returned

isDbTree

public boolean isDbTree()

Returns:

true if last entry was a DbTree entry.

isCheckpointEnd

public boolean isCheckpointEnd()

Returns:

true if last entry was a checkpoint end entry.

isCheckpointStart

public boolean isCheckpointStart()

Returns:

true if last entry was a checkpoint start entry.