1 /* 2 * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package jdk.jfr.consumer; 27 28 import java.time.DateTimeException; 29 import java.time.ZoneOffset; 30 31 import jdk.jfr.internal.LogLevel; 32 import jdk.jfr.internal.LogTag; 33 import jdk.jfr.internal.Logger; 34 import jdk.jfr.internal.consumer.ChunkHeader; 35 36 /** 37 * Converts ticks to nanoseconds 38 */ 39 final class TimeConverter { 40 private final long startTicks; 41 private final long startNanos; 42 private final double divisor; 43 private final ZoneOffset zoneOffet; 44 45 TimeConverter(ChunkHeader chunkHeader, int rawOffset) { 46 this.startTicks = chunkHeader.getStartTicks(); 47 this.startNanos = chunkHeader.getStartNanos(); 48 this.divisor = chunkHeader.getTicksPerSecond() / 1000_000_000L; 49 this.zoneOffet = zoneOfSet(rawOffset); 50 } 51 52 private ZoneOffset zoneOfSet(int rawOffset) { 53 try { 54 return ZoneOffset.ofTotalSeconds(rawOffset / 1000); 55 } catch (DateTimeException dte) { 56 Logger.log(LogTag.JFR_SYSTEM_PARSER, LogLevel.INFO, "Could not create ZoneOffset from raw offset " + rawOffset); 57 } 58 return ZoneOffset.UTC; 59 } 60 61 public long convertTimestamp(long ticks) { 62 return startNanos + (long) ((ticks - startTicks) / divisor); 63 } 64 65 public long convertTimespan(long ticks) { 66 return (long) (ticks / divisor); 67 } 68 69 public ZoneOffset getZoneOffset() { 70 return zoneOffet; 71 } 72 }