org.apache.solr.metrics

Class SolrMetricManager.GaugeWrapper<T>

java.lang.Object

org.apache.solr.metrics.SolrMetricManager.GaugeWrapper<T>

All Implemented Interfaces:

com.codahale.metrics.Gauge<T>, com.codahale.metrics.Metric

Enclosing class:

SolrMetricManager

public static class SolrMetricManager.GaugeWrapper<T>
extends Object
implements com.codahale.metrics.Gauge<T>

This is a wrapper for Gauge metrics, which are usually implemented as lambdas that often keep a reference to their parent instance. In order to make sure that all such metrics are removed when their parent instance is removed / closed the metric is associated with an instance tag, which can be used then to remove wrappers with the matching tag using SolrMetricManager.unregisterGauges(String, String).

Constructor Summary

Constructors

Constructor and Description
GaugeWrapper(com.codahale.metrics.Gauge<T> gauge, String tag)

Method Summary

Modifier and Type	Method and Description
com.codahale.metrics.Gauge<T>	getGauge()
String	getTag()
T	getValue()

Methods inherited from class java.lang.Object

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

Constructor Detail

GaugeWrapper

public GaugeWrapper(com.codahale.metrics.Gauge<T> gauge,
                    String tag)

Method Detail

getValue

public T getValue()

Specified by:

getValue in interface com.codahale.metrics.Gauge<T>

getTag

public String getTag()

getGauge

public com.codahale.metrics.Gauge<T> getGauge()