org.apache.hadoop.hbase.wal

Class AbstractWALRoller.RollController

java.lang.Object

org.apache.hadoop.hbase.wal.AbstractWALRoller.RollController

Enclosing class:

AbstractWALRoller<T extends Abortable>

protected class AbstractWALRoller.RollController
extends Object

Independently control the roll of each wal. When use multiwal, can avoid all wal roll together. see HBASE-24665 for detail

Field Summary

Fields

Modifier and Type	Field and Description
private long	lastRollTime
private AtomicBoolean	rollRequest
private WAL	wal

Constructor Summary

Constructors

Constructor and Description
RollController(WAL wal)

Method Summary

Modifier and Type	Method and Description
boolean	isRollRequested()
boolean	needsPeriodicRoll(long now)
boolean	needsRoll(long now)
void	requestRoll()
Map<byte[],List<byte[]>>	rollWal(long now)

Methods inherited from class java.lang.Object

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

Field Detail

wal

private final WAL wal

rollRequest

private final AtomicBoolean rollRequest

lastRollTime

private long lastRollTime

Constructor Detail

RollController

RollController(WAL wal)

Method Detail

requestRoll

public void requestRoll()

rollWal

public Map<byte[],List<byte[]>> rollWal(long now)
                                 throws IOException

Throws:

IOException

isRollRequested

public boolean isRollRequested()

needsPeriodicRoll

public boolean needsPeriodicRoll(long now)

needsRoll

public boolean needsRoll(long now)