Package org.apache.bookkeeper.bookie

Class EntryLogCompactor

java.lang.Object

org.apache.bookkeeper.bookie.AbstractLogCompactor

org.apache.bookkeeper.bookie.EntryLogCompactor

public class EntryLogCompactor
extends AbstractLogCompactor

This is the basic entry log compactor to compact entry logs. The compaction is done by scanning the old entry log file, copy the active ledgers to the current entry logger and remove the old entry log when the scan is over.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) class	EntryLogCompactor.CompactionScannerFactory	A scanner wrapper to check whether a ledger is alive in an entry log file.

Nested classes/interfaces inherited from class org.apache.bookkeeper.bookie.AbstractLogCompactor

AbstractLogCompactor.LogRemovalListener, AbstractLogCompactor.Throttler

Field Summary

Fields

Modifier and Type	Field	Description
(package private) final EntryLogger	entryLogger
(package private) final CompactableLedgerStorage	ledgerStorage
(package private) final EntryLogCompactor.CompactionScannerFactory	scannerFactory

Fields inherited from class org.apache.bookkeeper.bookie.AbstractLogCompactor

conf, logRemovalListener, throttler

Constructor Summary

Constructors

Constructor	Description
EntryLogCompactor(ServerConfiguration conf, EntryLogger entryLogger, CompactableLedgerStorage ledgerStorage, AbstractLogCompactor.LogRemovalListener logRemover)

Method Summary

Modifier and Type	Method	Description
boolean	compact(EntryLogMetadata entryLogMeta)	Compact entry log file.

Methods inherited from class org.apache.bookkeeper.bookie.AbstractLogCompactor

cleanUpAndRecover

Methods inherited from class java.lang.Object

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

Field Details

scannerFactory

final EntryLogCompactor.CompactionScannerFactory scannerFactory

entryLogger

final EntryLogger entryLogger

ledgerStorage

final CompactableLedgerStorage ledgerStorage

Constructor Details

EntryLogCompactor

public EntryLogCompactor(ServerConfiguration conf,
 EntryLogger entryLogger,
 CompactableLedgerStorage ledgerStorage,
 AbstractLogCompactor.LogRemovalListener logRemover)

Method Details

compact

public boolean compact(EntryLogMetadata entryLogMeta)

Description copied from class: AbstractLogCompactor

Compact entry log file.

Specified by:

compact in class AbstractLogCompactor

Parameters:

entryLogMeta - log metadata for the entry log to be compacted

Returns:

true for succeed