001/* 002 * (C) Copyright 2016 Nuxeo SA (http://nuxeo.com/) and others. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 * Contributors: 017 * bdelbosc 018 */ 019package org.nuxeo.elasticsearch; 020 021/** 022 * @since 8.3 023 */ 024public final class Timestamp { 025 // currentTimeMillis is not accurate especially under windows (15ms granularity) 026 static final long t0 = System.currentTimeMillis() * 1000; 027 028 // nanoTime is accurate but the value is not a timestamp it dependds on the OS/JVM 029 static final long n0 = System.nanoTime(); 030 031 private Timestamp() { 032 } 033 034 /** 035 * Gets an accurate timestamp in micro seconds 036 */ 037 public static long currentTimeMicros() { 038 return t0 + (System.nanoTime() - n0) / 1000; 039 } 040}