001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache license, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the license for the specific language governing permissions and
015 * limitations under the license.
016 */
017
018package org.apache.logging.log4j.core.util;
019
020/**
021 * Provides the high-resolution time stamp used in log events.
022 */
023public interface NanoClock {
024    /**
025     * Returns the current value of the running Java Virtual Machine's high-resolution time source, in nanoseconds.
026     *
027     * @return the current value of the running Java Virtual Machine's high-resolution time source, in nanoseconds
028     */
029    long nanoTime();
030}