Uses of Interface
org.apache.hadoop.metrics.MetricsContext

Packages that use MetricsContext

org.apache.hadoop.dfs	A distributed implementation of FileSystem.
org.apache.hadoop.dfs.datanode.metrics
org.apache.hadoop.ipc.metrics
org.apache.hadoop.mapred	A software framework for easily writing applications which process vast amounts of data (multi-terabyte data-sets) parallelly on large clusters (thousands of nodes) built of commodity hardware in a reliable, fault-tolerant manner.
org.apache.hadoop.metrics	This package defines an API for reporting performance metric information.
org.apache.hadoop.metrics.file	Implementation of the metrics package that writes the metrics to a file.
org.apache.hadoop.metrics.ganglia	Implementation of the metrics package that sends metric data to Ganglia.
org.apache.hadoop.metrics.jvm
org.apache.hadoop.metrics.spi	The Service Provider Interface for the Metrics API.

Uses of MetricsContext in org.apache.hadoop.dfs

Methods in org.apache.hadoop.dfs with parameters of type MetricsContext

void	FSNamesystemMetrics.doUpdates(MetricsContext unused) Since this object is a registered updater, this method will be called periodically, e.g.
void	NameNodeMetrics.doUpdates(MetricsContext unused) Since this object is a registered updater, this method will be called periodically, e.g.

Uses of MetricsContext in org.apache.hadoop.dfs.datanode.metrics

Methods in org.apache.hadoop.dfs.datanode.metrics with parameters of type MetricsContext

void	DataNodeMetrics.doUpdates(MetricsContext unused) Since this object is a registered updater, this method will be called periodically, e.g.

Uses of MetricsContext in org.apache.hadoop.ipc.metrics

Methods in org.apache.hadoop.ipc.metrics with parameters of type MetricsContext

void	RpcMetrics.doUpdates(MetricsContext context) Push the metrics to the monitoring subsystem on doUpdate() call.

Uses of MetricsContext in org.apache.hadoop.mapred

Methods in org.apache.hadoop.mapred with parameters of type MetricsContext

void	TaskTracker.TaskTrackerMetrics.doUpdates(MetricsContext unused) Since this object is a registered updater, this method will be called periodically, e.g.

Uses of MetricsContext in org.apache.hadoop.metrics

Methods in org.apache.hadoop.metrics that return MetricsContext

static MetricsContext	MetricsUtil.getContext(String contextName) Utility method to return the named context.
MetricsContext	ContextFactory.getContext(String contextName) Returns the named MetricsContext instance, constructing it if necessary using the factory's current configuration attributes.
static MetricsContext	ContextFactory.getNullContext(String contextName) Returns a "null" context - one which does nothing.

Methods in org.apache.hadoop.metrics with parameters of type MetricsContext

static MetricsRecord	MetricsUtil.createRecord(MetricsContext context, String recordName) Utility method to create and return new metrics record instance within the given context.
void	Updater.doUpdates(MetricsContext context) Timer-based call-back from the metric library.

Uses of MetricsContext in org.apache.hadoop.metrics.file

Classes in org.apache.hadoop.metrics.file that implement MetricsContext

class

FileContext Metrics context for writing metrics to a file. This class is configured by setting ContextFactory attributes which in turn are usually configured through a properties file.

Uses of MetricsContext in org.apache.hadoop.metrics.ganglia

Classes in org.apache.hadoop.metrics.ganglia that implement MetricsContext

class

GangliaContext Context for sending metrics to Ganglia.

Uses of MetricsContext in org.apache.hadoop.metrics.jvm

Methods in org.apache.hadoop.metrics.jvm with parameters of type MetricsContext

void	JvmMetrics.doUpdates(MetricsContext context) This will be called periodically (with the period being configuration dependent).

Uses of MetricsContext in org.apache.hadoop.metrics.spi

Classes in org.apache.hadoop.metrics.spi that implement MetricsContext

class	AbstractMetricsContext The main class of the Service Provider Interface.
class	NullContext Null metrics context: a metrics context which does nothing.
class	NullContextWithUpdateThread A null context which has a thread calling periodically when monitoring is started.