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

Method Summary

Modifier and Type	Method	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 Details

GaugeWrapper

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

Method Details

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()