alluxio.metrics.sink

Class MetricsServlet

java.lang.Object

alluxio.metrics.sink.MetricsServlet

All Implemented Interfaces:

Sink

@NotThreadSafe
public class MetricsServlet
extends Object
implements Sink

A sink that exposes metrics data in JSON format by HTTP.

Field Summary

Fields

Modifier and Type	Field and Description
static com.fasterxml.jackson.databind.ObjectMapper	OBJECT_MAPPER
static String	SERVLET_PATH

Constructor Summary

Constructors

Constructor and Description
MetricsServlet(com.codahale.metrics.MetricRegistry registry) Creates a new MetricsServlet with a Properties and MetricRegistry.

Method Summary

Modifier and Type	Method and Description
org.eclipse.jetty.servlet.ServletContextHandler	getHandler() Gets the ServletContextHandler of the metrics servlet.
void	report() Reports the current values of all metrics.
void	start() Starts the reporter polling.
void	stop() Stops the reporter.

Methods inherited from class java.lang.Object

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

Field Detail

SERVLET_PATH

public static final String SERVLET_PATH

See Also:

Constant Field Values

OBJECT_MAPPER

public static final com.fasterxml.jackson.databind.ObjectMapper OBJECT_MAPPER

Constructor Detail

MetricsServlet

public MetricsServlet(com.codahale.metrics.MetricRegistry registry)

Creates a new MetricsServlet with a Properties and MetricRegistry.

Parameters:

registry - the metric registry to register

Method Detail

getHandler

public org.eclipse.jetty.servlet.ServletContextHandler getHandler()

Gets the ServletContextHandler of the metrics servlet.

Returns:

the ServletContextHandler object

start

public void start()

Description copied from interface: Sink

Starts the reporter polling.

Specified by:

start in interface Sink

stop

public void stop()

Description copied from interface: Sink

Stops the reporter.

Specified by:

stop in interface Sink

report

public void report()

Description copied from interface: Sink

Reports the current values of all metrics.

Specified by:

report in interface Sink