org.apache.hadoop.metrics.spi

类 NullContextWithUpdateThread

java.lang.Object

org.apache.hadoop.metrics.spi.AbstractMetricsContext

org.apache.hadoop.metrics.spi.NullContextWithUpdateThread

所有已实现的接口:

MetricsContext

已过时。

in favor of org.apache.hadoop.metrics2 usage.

@Deprecated
@InterfaceAudience.Public
@InterfaceStability.Evolving
public class NullContextWithUpdateThread
extends AbstractMetricsContext

A null context which has a thread calling periodically when monitoring is started. This keeps the data sampled correctly. In all other respects, this is like the NULL context: No data is emitted. This is suitable for Monitoring systems like JMX which reads the metrics when someone reads the data from JMX. The default impl of start and stop monitoring: is the AbstractMetricsContext is good enough.

嵌套类概要

从类继承的嵌套类/接口 org.apache.hadoop.metrics.spi.AbstractMetricsContext

AbstractMetricsContext.MetricMap, AbstractMetricsContext.TagMap

字段概要

从接口继承的字段 org.apache.hadoop.metrics.MetricsContext

DEFAULT_PERIOD

构造器概要

构造器

构造器和说明
NullContextWithUpdateThread() 已过时。 Creates a new instance of NullContextWithUpdateThread

方法概要

方法

限定符和类型	方法和说明
protected void	emitRecord(String contextName, String recordName, OutputRecord outRec) 已过时。 Do-nothing version of emitRecord
void	init(String contextName, ContextFactory factory) 已过时。 Initializes the context.
protected void	remove(MetricsRecordImpl record) 已过时。 Do-nothing version of remove
protected void	update(MetricsRecordImpl record) 已过时。 Do-nothing version of update

从类继承的方法 org.apache.hadoop.metrics.spi.AbstractMetricsContext

close, createRecord, flush, getAllRecords, getAttribute, getAttributeTable, getContextFactory, getContextName, getPeriod, isMonitoring, newRecord, parseAndSetPeriod, registerUpdater, setPeriod, startMonitoring, stopMonitoring, unregisterUpdater

从类继承的方法 java.lang.Object

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

构造器详细资料

NullContextWithUpdateThread

@InterfaceAudience.Private
public NullContextWithUpdateThread()

已过时。

Creates a new instance of NullContextWithUpdateThread

方法详细资料

init

@InterfaceAudience.Private
public void init(String contextName,
                                  ContextFactory factory)

已过时。

从类复制的说明: AbstractMetricsContext

Initializes the context.

指定者:

init 在接口中 MetricsContext

覆盖:

init 在类中 AbstractMetricsContext

参数:

contextName - The given name for this context

factory - The creator of this context

emitRecord

@InterfaceAudience.Private
protected void emitRecord(String contextName,
                                        String recordName,
                                        OutputRecord outRec)

已过时。

Do-nothing version of emitRecord

指定者:

emitRecord 在类中 AbstractMetricsContext

update

@InterfaceAudience.Private
protected void update(MetricsRecordImpl record)

已过时。

Do-nothing version of update

覆盖:

update 在类中 AbstractMetricsContext

remove

@InterfaceAudience.Private
protected void remove(MetricsRecordImpl record)

已过时。

Do-nothing version of remove

覆盖:

remove 在类中 AbstractMetricsContext