001package org.nuxeo.elasticsearch;/* 002 * (C) Copyright 2016 Nuxeo SA (http://nuxeo.com/) and contributors. 003 * 004 * All rights reserved. This program and the accompanying materials 005 * are made available under the terms of the GNU Lesser General Public License 006 * (LGPL) version 2.1 which accompanies this distribution, and is available at 007 * http://www.gnu.org/licenses/lgpl-2.1.html 008 * 009 * This library is distributed in the hope that it will be useful, 010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 012 * Lesser General Public License for more details. 013 * 014 * Contributors: 015 * bdelbosc 016 */ 017 018/** 019 * @since 8.3 020 */ 021public final class Timestamp { 022 // currentTimeMillis is not accurate especially under windows (15ms granularity) 023 final static long t0 = System.currentTimeMillis() * 1000; 024 // nanoTime is accurate but the value is not a timestamp it dependds on the OS/JVM 025 final static long n0 = System.nanoTime(); 026 027 private Timestamp() { 028 } 029 030 /** 031 * Gets an accurate timestamp in micro seconds 032 */ 033 public static long currentTimeMicros() { 034 return t0 + (System.nanoTime() - n0) / 1000; 035 } 036}