org.apache.hadoop.hbase.regionserver.wal

类 MetricsWAL

java.lang.Object

org.apache.hadoop.hbase.regionserver.wal.MetricsWAL

所有已实现的接口:

WALActionsListener

@InterfaceAudience.Private
public class MetricsWAL
extends Object
implements WALActionsListener

Class used to push numbers about the WAL into the metrics subsystem. This will take a single function call and turn it into multiple manipulations of the hadoop metrics system.

构造器概要

构造器

构造器和说明
MetricsWAL()

方法概要

限定符和类型	方法和说明
void	logRollRequested(boolean underReplicated) A request was made that the WAL be rolled.
void	postAppend(long size, long time, WALKey logkey, WALEdit logEdit) For notification post append to the writer.
void	postSync(long timeInNanos, int handlerSyncs) For notification post writer sync.

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.hadoop.hbase.regionserver.wal.WALActionsListener

logCloseRequested, postLogArchive, postLogRoll, preLogArchive, preLogRoll, visitLogEntryBeforeWrite, visitLogEntryBeforeWrite

构造器详细资料

MetricsWAL

public MetricsWAL()

方法详细资料

postSync

public void postSync(long timeInNanos,
                     int handlerSyncs)

从接口复制的说明: WALActionsListener

For notification post writer sync. Used by metrics system at least.

指定者:

postSync 在接口中 WALActionsListener

参数:

timeInNanos - How long the filesystem sync took in nanoseconds.

handlerSyncs - How many sync handler calls were released by this call to filesystem sync.

postAppend

public void postAppend(long size,
                       long time,
                       WALKey logkey,
                       WALEdit logEdit)
                throws IOException

从接口复制的说明: WALActionsListener

For notification post append to the writer. Used by metrics system at least. TODO: Combine this with above.

指定者:

postAppend 在接口中 WALActionsListener

参数:

size - approx length of cells in this append.

time - elapsed time in milliseconds.

logkey - A WAL key

logEdit - A WAL edit containing list of cells.

抛出:

IOException - if any network or I/O error occurred

logRollRequested

public void logRollRequested(boolean underReplicated)

从接口复制的说明: WALActionsListener

A request was made that the WAL be rolled.

指定者:

logRollRequested 在接口中 WALActionsListener