org.apache.hadoop.metrics2.impl

类 MetricsSystemImpl

java.lang.Object

org.apache.hadoop.metrics2.impl.MetricsSystemImpl

所有已实现的接口:

MetricsSystem, MetricsSystemMXBean

public class MetricsSystemImpl
extends Object
implements MetricsSystem

A base class for metrics system singletons

嵌套类概要

从接口继承的嵌套类/接口 org.apache.hadoop.metrics2.MetricsSystem

MetricsSystem.AbstractCallback, MetricsSystem.Callback

构造器概要

构造器

构造器和说明
MetricsSystemImpl() Construct the system but not initializing (read config etc.) it.
MetricsSystemImpl(String prefix) Construct the metrics system

方法概要

方法

限定符和类型	方法和说明
String	currentConfig()
void	init(String prefix) Initialized the metrics system with a prefix.
void	publishMetricsNow() Requests an immediate publish of all metrics from sources to sinks.
void	refreshMBeans() Force a refresh of MBeans
void	register(MetricsSystem.Callback callback) Register a callback interface for JMX events
<T extends MetricsSink> T	register(String name, String description, T sink) Register a metrics sink
<T extends MetricsSource> T	register(String name, String desc, T source) Register a metrics source
void	shutdown() Shutdown the metrics system completely (usually during server shutdown.)
void	start() Start the metrics system
void	stop() Stop the metrics system

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

MetricsSystemImpl

public MetricsSystemImpl(String prefix)

Construct the metrics system

参数:

prefix - for the system

MetricsSystemImpl

public MetricsSystemImpl()

Construct the system but not initializing (read config etc.) it.

方法详细资料

init

public void init(String prefix)

Initialized the metrics system with a prefix.

参数:

prefix - the system will look for configs with the prefix

start

public void start()

从接口复制的说明: MetricsSystemMXBean

Start the metrics system

指定者:

start 在接口中 MetricsSystemMXBean

stop

public void stop()

从接口复制的说明: MetricsSystemMXBean

Stop the metrics system

指定者:

stop 在接口中 MetricsSystemMXBean

register

public <T extends MetricsSource> T register(String name,
                                   String desc,
                                   T source)

从接口复制的说明: MetricsSystem

Register a metrics source

指定者:

register 在接口中 MetricsSystem

类型参数:

T - the type of the source

参数:

name - of the source. Must be unique.

desc - the description of the source.

source - to register

返回:

the source

register

public <T extends MetricsSink> T register(String name,
                                 String description,
                                 T sink)

从接口复制的说明: MetricsSystem

Register a metrics sink

指定者:

register 在接口中 MetricsSystem

类型参数:

T - the type of the sink

参数:

name - of the sink. Must be unique.

description - the description of the sink

sink - to register

返回:

the sink

register

public void register(MetricsSystem.Callback callback)

从接口复制的说明: MetricsSystem

Register a callback interface for JMX events

指定者:

register 在接口中 MetricsSystem

参数:

callback - the callback object implementing the MBean interface.

refreshMBeans

public void refreshMBeans()

从接口复制的说明: MetricsSystemMXBean

Force a refresh of MBeans

指定者:

refreshMBeans 在接口中 MetricsSystemMXBean

currentConfig

public String currentConfig()

指定者:

currentConfig 在接口中 MetricsSystemMXBean

返回:

the current config Note, avoid getConfig, as it'll turn it into an attribute, which doesn't support multiple lines in the values.

publishMetricsNow

public void publishMetricsNow()

Requests an immediate publish of all metrics from sources to sinks.

指定者:

publishMetricsNow 在接口中 MetricsSystem

shutdown

public void shutdown()

从接口复制的说明: MetricsSystem

Shutdown the metrics system completely (usually during server shutdown.) The MetricsSystemMXBean will be unregistered.

指定者:

shutdown 在接口中 MetricsSystem