/*
 * 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.cassandra.util;

import java.util.concurrent.Callable;
import java.util.function.LongConsumer;

public class StatsUtil
{
    private StatsUtil()
    {

    }

    /**
     * Convenient helper that captures the time taken to run the task and pass it to the {@link LongConsumer} to report.
     * It is suitable for the tasks that have simple scope. For the complicated ones that have distinct callsites for
     * starting and stopping the timer, the method does not fit.
     */
    public static <T> T reportTimeTaken(Callable<T> task, LongConsumer nanosTaken)
    {
        long current = System.nanoTime();
        try
        {
            T res = task.call();
            nanosTaken.accept(System.nanoTime() - current);
            return res;
        }
        catch (Exception e)
        {
            throw new RuntimeException(e);
        }
    }
}
