/*
 * 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, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.pulsar.common.stats;

import java.util.concurrent.TimeUnit;

/**
 * Utility class for metrics.
 */
public class MetricsUtil {

    private static final double NANOS_IN_SECOND = TimeUnit.SECONDS.toNanos(1);

    /**
     * Convert a duration to seconds. Unlike {@link TimeUnit#toSeconds(long)}, this method preserves fractional
     * precision.
     *
     * @param duration the duration
     * @param timeUnit the time unit
     * @return the duration in seconds
     */
    public static double convertToSeconds(long duration, TimeUnit timeUnit) {
        return timeUnit.toNanos(duration) / NANOS_IN_SECOND;
    }

}
