com.sleepycat.je.log

Class LogManager

java.lang.Object

com.sleepycat.je.log.LogManager

Direct Known Subclasses:

LatchedLogManager, SyncedLogManager

public abstract class LogManager
extends java.lang.Object

The LogManager supports reading and writing to the JE log.

Field Summary

Fields

Modifier and Type	Field and Description
protected EnvironmentImpl	envImpl
protected com.sleepycat.je.log.LogBufferPool	logBufferPool
protected Latch	logWriteLatch

Constructor Summary

Constructors

Constructor and Description
LogManager(EnvironmentImpl envImpl, boolean readOnly) There is a single log manager per database environment.

Method Summary

Methods

Modifier and Type	Method and Description
abstract void	countObsoleteDb(DatabaseImpl db)
abstract void	countObsoleteINs(java.util.List<java.lang.Long> lsnList, DatabaseImpl nodeDb) Counts the given obsolete IN LSNs under the log write latch.
abstract void	countObsoleteNode(long lsn, LogEntryType type, int size, DatabaseImpl nodeDb) Count node as obsolete under the log write latch.
void	flush() Flush all log entries, fsync the log file.
void	flushNoSync() May be used to avoid sync to speed unit tests.
java.lang.Object	get(long lsn) Fault in the first object in the log entry log entry at this LSN.
java.nio.ByteBuffer	getByteBufferFromLog(long lsn) Return a ByteBuffer holding the log entry at this LSN.
boolean	getChecksumOnRead()
long	getLastLsnAtRecovery()
LogEntry	getLogEntry(long lsn) Instantiate all the objects in the log entry at this LSN.
LogSource	getLogSource(long lsn) Find the LSN, whether in a file or still in the log buffers.
abstract TrackedFileSummary	getUnflushableTrackedSummary(long file) Returns a tracked summary for the given file which will not be flushed.
abstract void	loadEndOfLogStat(EnvironmentStats stats)
void	loadStats(StatsConfig config, EnvironmentStats stats)
long	log(LogEntry entry, boolean isProvisional, boolean backgroundIO, long oldNodeLsn, DatabaseImpl nodeDb, ReplicationContext repContext) Write a log entry.
long	log(LogEntry entry, Provisional provisional, boolean backgroundIO, long oldNodeLsn, DatabaseImpl nodeDb, ReplicationContext repContext) Write a log entry.
long	log(LogEntry entry, ReplicationContext repContext) Write a log entry.
void	log(LogItem item, LogContext context) Convenience method for logging a single entry.
long	logForceFlip(LogEntry entry) Log this single object and force a flip of the log files.
long	logForceFlush(LogEntry entry, boolean fsyncRequired, ReplicationContext repContext) Log this single object and force a write of the log files.
java.nio.ByteBuffer	marshallIntoBuffer(LogEntryHeader header, LogEntry entry) Serialize a loggable object into this buffer.
void	multiLog(LogItem[] itemArray, LogContext context)
abstract boolean	removeDbFileSummary(DatabaseImpl db, java.lang.Long fileNum)
abstract void	removeTrackedFile(TrackedFileSummary tfs) Removes the tracked summary for the given file.
protected void	removeTrackedFileInternal(TrackedFileSummary tfs)
void	resetPool(DbConfigManager configManager) Reset the pool when the cache is resized.
void	setLastLsnAtRecovery(long lastLsnAtRecovery)
void	setReadHook(TestHook hook)
abstract void	transferToUtilizationTracker(LocalUtilizationTracker localTracker)

Methods inherited from class java.lang.Object

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

Field Detail

logBufferPool

protected com.sleepycat.je.log.LogBufferPool logBufferPool

logWriteLatch

protected Latch logWriteLatch

envImpl

protected EnvironmentImpl envImpl

Constructor Detail

LogManager

public LogManager(EnvironmentImpl envImpl,
          boolean readOnly)
           throws DatabaseException

There is a single log manager per database environment.

Throws:

DatabaseException

Method Detail

getChecksumOnRead

public boolean getChecksumOnRead()

getLastLsnAtRecovery

public long getLastLsnAtRecovery()

setLastLsnAtRecovery

public void setLastLsnAtRecovery(long lastLsnAtRecovery)

resetPool

public void resetPool(DbConfigManager configManager)
               throws DatabaseException

Reset the pool when the cache is resized. This method is called after the memory budget has been calculated.

Throws:

DatabaseException

logForceFlush

public long logForceFlush(LogEntry entry,
                 boolean fsyncRequired,
                 ReplicationContext repContext)
                   throws DatabaseException

Log this single object and force a write of the log files.

Parameters:

entry - object to be logged

fsyncRequired - if true, log files should also be fsynced.

Returns:

LSN of the new log entry

Throws:

DatabaseException

logForceFlip

public long logForceFlip(LogEntry entry)
                  throws DatabaseException

Log this single object and force a flip of the log files.

Parameters:

entry - object to be logged

Returns:

LSN of the new log entry

Throws:

DatabaseException

log

public long log(LogEntry entry,
       ReplicationContext repContext)
         throws DatabaseException

Write a log entry.

Parameters:

entry - object to be logged

Returns:

LSN of the new log entry

Throws:

DatabaseException

log

public long log(LogEntry entry,
       boolean isProvisional,
       boolean backgroundIO,
       long oldNodeLsn,
       DatabaseImpl nodeDb,
       ReplicationContext repContext)
         throws DatabaseException

Write a log entry.

Parameters:

entry - object to be logged

isProvisional - true if this entry should not be read during recovery.

backgroundIO - if true, sleep when the backgroundIOLimit is exceeded.

oldNodeLsn - is the previous version of the node to be counted as obsolete, or NULL_LSN if the entry is not a node or has no old LSN.

nodeDb - database of the node, or null if entry is not a node.

Returns:

LSN of the new log entry

Throws:

DatabaseException

log

public long log(LogEntry entry,
       Provisional provisional,
       boolean backgroundIO,
       long oldNodeLsn,
       DatabaseImpl nodeDb,
       ReplicationContext repContext)
         throws DatabaseException

Write a log entry.

Parameters:

entry - object to be logged

provisional - whether this entry should be processed during recovery.

backgroundIO - if true, sleep when the backgroundIOLimit is exceeded.

oldNodeLsn - is the previous version of the node to be counted as obsolete, or NULL_LSN if the entry is not a node or has no old LSN.

nodeDb - database of the node, or null if entry is not a node.

Returns:

LSN of the new log entry

Throws:

DatabaseException

log

public void log(LogItem item,
       LogContext context)
         throws DatabaseException

Convenience method for logging a single entry.

Throws:

DatabaseException

multiLog

public void multiLog(LogItem[] itemArray,
            LogContext context)
              throws DatabaseException

Throws:

DatabaseException

marshallIntoBuffer

public java.nio.ByteBuffer marshallIntoBuffer(LogEntryHeader header,
                                     LogEntry entry)
                                       throws DatabaseException

Serialize a loggable object into this buffer. (public for unit tests.

Throws:

DatabaseException

getLogEntry

public LogEntry getLogEntry(long lsn)
                     throws DatabaseException

Instantiate all the objects in the log entry at this LSN.

Parameters:

lsn - location of entry in log.

Returns:

log entry that embodies all the objects in the log entry.

Throws:

DatabaseException

getByteBufferFromLog

public java.nio.ByteBuffer getByteBufferFromLog(long lsn)
                                         throws DatabaseException

Return a ByteBuffer holding the log entry at this LSN. The log entry must begin at position 0, to mimic the marshalledBuffer used in logInternal().

Parameters:

lsn - location of entry in log

Returns:

log entry that embodies all the objects in the log entry

Throws:

DatabaseException

get

public java.lang.Object get(long lsn)
                     throws DatabaseException

Fault in the first object in the log entry log entry at this LSN.

Parameters:

lsn - location of object in log

Returns:

the object in the log

Throws:

DatabaseException

getLogSource

public LogSource getLogSource(long lsn)
                       throws DatabaseException

Find the LSN, whether in a file or still in the log buffers. Is public for unit testing.

Throws:

DatabaseException

flush

public void flush()
           throws DatabaseException

Flush all log entries, fsync the log file.

Throws:

DatabaseException

flushNoSync

public void flushNoSync()
                 throws DatabaseException

May be used to avoid sync to speed unit tests.

Throws:

DatabaseException

loadStats

public void loadStats(StatsConfig config,
             EnvironmentStats stats)
               throws DatabaseException

Throws:

DatabaseException

getUnflushableTrackedSummary

public abstract TrackedFileSummary getUnflushableTrackedSummary(long file)
                                                         throws DatabaseException

Returns a tracked summary for the given file which will not be flushed. Used for watching changes that occur while a file is being cleaned.

Throws:

DatabaseException

removeTrackedFile

public abstract void removeTrackedFile(TrackedFileSummary tfs)
                                throws DatabaseException

Removes the tracked summary for the given file.

Throws:

DatabaseException

removeTrackedFileInternal

protected void removeTrackedFileInternal(TrackedFileSummary tfs)

countObsoleteNode

public abstract void countObsoleteNode(long lsn,
                     LogEntryType type,
                     int size,
                     DatabaseImpl nodeDb)
                                throws DatabaseException

Count node as obsolete under the log write latch. This is done here because the log write latch is managed here, and all utilization counting must be performed under the log write latch.

Throws:

DatabaseException

transferToUtilizationTracker

public abstract void transferToUtilizationTracker(LocalUtilizationTracker localTracker)
                                           throws DatabaseException

Throws:

DatabaseException

See Also:

BaseLocalUtilizationTracker.transferToUtilizationTracker(com.sleepycat.je.cleaner.UtilizationTracker)

countObsoleteINs

public abstract void countObsoleteINs(java.util.List<java.lang.Long> lsnList,
                    DatabaseImpl nodeDb)
                               throws DatabaseException

Counts the given obsolete IN LSNs under the log write latch.

Throws:

DatabaseException

countObsoleteDb

public abstract void countObsoleteDb(DatabaseImpl db)
                              throws DatabaseException

Throws:

DatabaseException

See Also:

DatabaseImpl.countObsoleteDb(com.sleepycat.je.cleaner.BaseUtilizationTracker, long)

removeDbFileSummary

public abstract boolean removeDbFileSummary(DatabaseImpl db,
                          java.lang.Long fileNum)
                                     throws DatabaseException

Throws:

DatabaseException

loadEndOfLogStat

public abstract void loadEndOfLogStat(EnvironmentStats stats)
                               throws DatabaseException

Throws:

DatabaseException

setReadHook

public void setReadHook(TestHook hook)