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.

Field Summary

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

anticipateChecksumErrors, cksumValidator, currentEntryHeader, currentEntryOffset, currentEntryPrevOffset, envImpl, eof, fileManager, nextEntryOffset, readBufferFileEnd, readBufferFileNum, readBufferFileStart, startLsn

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	isRoot()
protected boolean	isTargetEntry(byte logEntryTypeNumber, byte logEntryTypeVersion)
protected boolean	processEntry(java.nio.ByteBuffer entryBuffer) This reader instantiate the first object of a given log entry

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

getAndResetNReads, getLastEntrySize, getLastLsn, getNRepeatIteratorReads, getNumRead, initStartingPosition, readNextEntry, resyncReader, setAlwaysValidateChecksum

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 java.io.IOException,
                            DatabaseException

Create this reader to start at a given LSN.

Throws:

java.io.IOException

DatabaseException

Method Detail

isTargetEntry

protected boolean isTargetEntry(byte logEntryTypeNumber,
                    byte logEntryTypeVersion)

Overrides:

isTargetEntry in class FileReader

Returns:

true if this is a targetted entry.

processEntry

protected boolean processEntry(java.nio.ByteBuffer entryBuffer)
                        throws DatabaseException

This reader instantiate the first object of a given log entry

Specified by:

processEntry in class FileReader

Returns:

true if this entry should be returned

Throws:

DatabaseException

isRoot

public boolean isRoot()

Returns:

true if last entry was a root 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.