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Metrics is a Java library which gives you unparalleled insight into what your code does in production. Metrics provides a powerful toolkit of ways to measure the behavior of critical components in your production environment.

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package com.codahale.metrics;

/**
 * 
 * Similar to {@link Gauge}, but metric value is updated via calling {@link #setValue(T)} instead.
 * See {@link DefaultSettableGauge}.
 * 
 */
public interface SettableGauge extends Gauge {
    /**
     * Set the metric to a new value.
     */
    void setValue(T value);
}