org.apache.solr.util.stats

Class MetricUtils

java.lang.Object

org.apache.solr.util.stats.MetricUtils

public class MetricUtils
extends Object

Metrics specific utility functions.

Constructor Summary

Constructors

Constructor and Description
MetricUtils()

Method Summary

Modifier and Type	Method and Description
static void	addMetrics(NamedList<Object> lst, com.codahale.metrics.Timer timer) Adds metrics from a Timer to a NamedList, using well-known back-compat names.
static ExecutorService	instrumentedExecutorService(ExecutorService delegate, com.codahale.metrics.MetricRegistry metricRegistry, String scope) Returns an instrumented wrapper over the given executor service.
static NamedList	toNamedList(com.codahale.metrics.MetricRegistry registry, List<com.codahale.metrics.MetricFilter> shouldMatchFilters, com.codahale.metrics.MetricFilter mustMatchFilter) Returns a NamedList representation of the given metric registry.

Methods inherited from class java.lang.Object

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

Constructor Detail

MetricUtils

public MetricUtils()

Method Detail

addMetrics

public static void addMetrics(NamedList<Object> lst,
                              com.codahale.metrics.Timer timer)

Adds metrics from a Timer to a NamedList, using well-known back-compat names.

Parameters:

lst - The NamedList to add the metrics data to

timer - The Timer to extract the metrics from

toNamedList

public static NamedList toNamedList(com.codahale.metrics.MetricRegistry registry,
                                    List<com.codahale.metrics.MetricFilter> shouldMatchFilters,
                                    com.codahale.metrics.MetricFilter mustMatchFilter)

Returns a NamedList representation of the given metric registry. Only those metrics are converted to NamedList which match at least one of the given MetricFilter instances.

Parameters:

registry - the MetricRegistry to be converted to NamedList

shouldMatchFilters - a list of MetricFilter instances. A metric must match any one of the filters from this list to be included in the output

mustMatchFilter - a MetricFilter. A metric must match this filter to be included in the output.

Returns:

a NamedList

instrumentedExecutorService

public static ExecutorService instrumentedExecutorService(ExecutorService delegate,
                                                          com.codahale.metrics.MetricRegistry metricRegistry,
                                                          String scope)

Returns an instrumented wrapper over the given executor service.