Measurable.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
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 * See the License for the specific language governing permissions and
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package org.apache.kafka.common.metrics;

/**
 * A measurable quantity that can be registered as a metric
 */
public interface Measurable {

    /**
     * Measure this quantity and return the result as a double
     * @param config The configuration for this metric
     * @param now The POSIX time in milliseconds the measurement is being taken
     * @return The measured value
     */
    public double measure(MetricConfig config, long now);

}