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/*
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* Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package jdk.jfr.internal.consumer;
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import java.time.DateTimeException;
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import java.time.ZoneOffset;
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import jdk.jfr.internal.LogLevel;
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import jdk.jfr.internal.LogTag;
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import jdk.jfr.internal.Logger;
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import jdk.jfr.internal.consumer.ChunkHeader;
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/**
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* Converts ticks to nanoseconds
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*/
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final class TimeConverter {
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private final long startTicks;
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private final long startNanos;
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private final double divisor;
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private final ZoneOffset zoneOffet;
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TimeConverter(ChunkHeader chunkHeader, int rawOffset) {
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this.startTicks = chunkHeader.getStartTicks();
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this.startNanos = chunkHeader.getStartNanos();
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this.divisor = chunkHeader.getTicksPerSecond() / 1000_000_000L;
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this.zoneOffet = zoneOfSet(rawOffset);
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}
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public long convertTimestamp(long ticks) {
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return startNanos + (long) ((ticks - startTicks) / divisor);
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}
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public long convertTimespan(long ticks) {
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return (long) (ticks / divisor);
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}
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public ZoneOffset getZoneOffset() {
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return zoneOffet;
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}
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private ZoneOffset zoneOfSet(int rawOffset) {
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try {
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return ZoneOffset.ofTotalSeconds(rawOffset / 1000);
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} catch (DateTimeException dte) {
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Logger.log(LogTag.JFR_SYSTEM_PARSER, LogLevel.INFO, "Could not create ZoneOffset from raw offset " + rawOffset);
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}
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return ZoneOffset.UTC;
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}
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}
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