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• 5.1.1
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• GaugeLongMetric.java

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org.avaje.metric.GaugeLongMetric Maven / Gradle / Ivy

package org.avaje.metric;

/**
 * Metric based on an underlying gauge that reports long values.
 * 

 * A GaugeLongMetric is created by {@link MetricManager#register(MetricName, GaugeLong)}.
 * 
 * 

 * Example:
 * 
 * 
 * 
 *   class ThreadCountGauge implements GaugeLong {
 *       
 *       public long getValue() {
 *         return threadMXBean.getThreadCount();
 *       }
 *     }
 *   
 *   
 *   GaugeLongMetric gauge = MetricManager.register("jvm.thread.count", threadCountGauge);
 *     
 * 
 * 
 * 

 * Note that avaje-metric-core registers some core JVM gauges that include
 * threads, memory and garbage collection.
 */
public interface GaugeLongMetric extends Metric {

  /**
   * Return the value.
   */
  long getValue();

}