org.apache.slider.server.appmaster.management

Class MetricsAndMonitoring

java.lang.Object

org.apache.hadoop.service.AbstractService

org.apache.hadoop.service.CompositeService

org.apache.slider.server.appmaster.management.MetricsAndMonitoring

All Implemented Interfaces:

Closeable, AutoCloseable, org.apache.hadoop.service.Service

public class MetricsAndMonitoring
extends org.apache.hadoop.service.CompositeService

Class for all metrics and monitoring

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.service.CompositeService

org.apache.hadoop.service.CompositeService.CompositeServiceShutdownHook

Nested classes/interfaces inherited from interface org.apache.hadoop.service.Service

org.apache.hadoop.service.Service.STATE

Field Summary

Fields

Modifier and Type	Field and Description
static int	EVENT_LIMIT
protected static org.slf4j.Logger	log

Fields inherited from class org.apache.hadoop.service.CompositeService

STOP_ONLY_STARTED_SERVICES

Constructor Summary

Constructors

Constructor and Description
MetricsAndMonitoring()
MetricsAndMonitoring(String name)

Method Summary

Methods

Modifier and Type	Method and Description
void	addMetricSet(com.codahale.metrics.MetricSet metricSet) Add a metric set for registering and deregistration on service stop
void	addMetricSet(String prefix, com.codahale.metrics.MetricSet metricSet) add a metric set, giving each entry a prefix
List<RecordedEvent>	cloneEventHistory() Clone the event history; blocks for the duration of the copy operation.
com.codahale.metrics.health.HealthCheckRegistry	getHealth()
MeterAndCounter	getMeterAndCounter(String name)
com.codahale.metrics.MetricRegistry	getMetrics()
MeterAndCounter	getOrCreateMeterAndCounter(String name) Get or create the meter/counter pair
void	markMeterAndCounter(String name) Get a specific meter and mark it.
void	noteEvent(RecordedEvent event) Add an event (synchronized)
<T extends com.codahale.metrics.Metric> T	register(Class<?> klass, T metric, String... names)
<T extends com.codahale.metrics.Metric> T	register(String name, T metric) Given a Metric, registers it under the given name.
protected void	serviceInit(org.apache.hadoop.conf.Configuration conf)
protected void	serviceStop()
void	unregister(com.codahale.metrics.MetricSet metricSet) Unregister a metric set; robust

Methods inherited from class org.apache.hadoop.service.CompositeService

addIfService, addService, getServices, removeService, serviceStart

Methods inherited from class org.apache.hadoop.service.AbstractService

close, getBlockers, getConfig, getFailureCause, getFailureState, getLifecycleHistory, getName, getServiceState, getStartTime, init, isInState, noteFailure, putBlocker, registerGlobalListener, registerServiceListener, removeBlocker, setConfig, start, stop, toString, unregisterGlobalListener, unregisterServiceListener, waitForServiceToStop

Methods inherited from class java.lang.Object

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

Field Detail

log

protected static final org.slf4j.Logger log

EVENT_LIMIT

public static final int EVENT_LIMIT

See Also:

Constant Field Values

Constructor Detail

MetricsAndMonitoring

public MetricsAndMonitoring(String name)

MetricsAndMonitoring

public MetricsAndMonitoring()

Method Detail

getMetrics

public com.codahale.metrics.MetricRegistry getMetrics()

getHealth

public com.codahale.metrics.health.HealthCheckRegistry getHealth()

serviceInit

protected void serviceInit(org.apache.hadoop.conf.Configuration conf)
                    throws Exception

Overrides:

serviceInit in class org.apache.hadoop.service.CompositeService

Throws:

Exception

serviceStop

protected void serviceStop()
                    throws Exception

Overrides:

serviceStop in class org.apache.hadoop.service.CompositeService

Throws:

Exception

getMeterAndCounter

public MeterAndCounter getMeterAndCounter(String name)

getOrCreateMeterAndCounter

public MeterAndCounter getOrCreateMeterAndCounter(String name)

Get or create the meter/counter pair

Parameters:

name - name of instance

Returns:

an instance

markMeterAndCounter

public void markMeterAndCounter(String name)

Get a specific meter and mark it. This will create and register it on demand.

Parameters:

name - name of meter/counter

register

public <T extends com.codahale.metrics.Metric> T register(String name,
                                                 T metric)
                                               throws IllegalArgumentException

Given a Metric, registers it under the given name.

Type Parameters:

T - the type of the metric

Parameters:

name - the name of the metric

metric - the metric

Returns:

metric

Throws:

IllegalArgumentException - if the name is already registered

register

public <T extends com.codahale.metrics.Metric> T register(Class<?> klass,
                                                 T metric,
                                                 String... names)
                                               throws IllegalArgumentException

Throws:

IllegalArgumentException

noteEvent

public void noteEvent(RecordedEvent event)

Add an event (synchronized)

Parameters:

event - event

cloneEventHistory

public List<RecordedEvent> cloneEventHistory()

Clone the event history; blocks for the duration of the copy operation.

Returns:

a new list

addMetricSet

public void addMetricSet(com.codahale.metrics.MetricSet metricSet)

Add a metric set for registering and deregistration on service stop

Parameters:

metricSet - metric set

addMetricSet

public void addMetricSet(String prefix,
                com.codahale.metrics.MetricSet metricSet)

add a metric set, giving each entry a prefix

Parameters:

prefix - prefix (a trailing "." is automatically added)

metricSet - the metric set to register

unregister

public void unregister(com.codahale.metrics.MetricSet metricSet)

Unregister a metric set; robust

Parameters:

metricSet - metric set to unregister