1 /* 2 * Copyright (c) 2016, 2020, 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.internal.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 35 /** 36 * Converts ticks to nanoseconds 37 */ 38 final class TimeConverter { 39 private final long startTicks; 40 private final long startNanos; 41 private final double divisor; 42 private final ZoneOffset zoneOffset; 43 TimeConverter(ChunkHeader chunkHeader, int rawOffset)44 TimeConverter(ChunkHeader chunkHeader, int rawOffset) { 45 this.startTicks = chunkHeader.getStartTicks(); 46 this.startNanos = chunkHeader.getStartNanos(); 47 this.divisor = chunkHeader.getTicksPerSecond() / 1000_000_000L; 48 this.zoneOffset = zoneOfSet(rawOffset); 49 } 50 convertTimestamp(long ticks)51 public long convertTimestamp(long ticks) { 52 return startNanos + (long) ((ticks - startTicks) / divisor); 53 } 54 convertTimespan(long ticks)55 public long convertTimespan(long ticks) { 56 return (long) (ticks / divisor); 57 } 58 getZoneOffset()59 public ZoneOffset getZoneOffset() { 60 return zoneOffset; 61 } 62 zoneOfSet(int rawOffset)63 private ZoneOffset zoneOfSet(int rawOffset) { 64 try { 65 return ZoneOffset.ofTotalSeconds(rawOffset / 1000); 66 } catch (DateTimeException dte) { 67 Logger.log(LogTag.JFR_SYSTEM_PARSER, LogLevel.INFO, "Could not create ZoneOffset from raw offset " + rawOffset); 68 } 69 return ZoneOffset.UTC; 70 } 71 } 72