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A continuously growing collection of utilities to measure performance, get better diagnostics, improve performance, or do things more reliably, faster that other open source libraries...

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/*
 * Copyright (c) 2001-2017, Zoltan Farkas All Rights Reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * Additionally licensed with:
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.spf4j.net;

import org.spf4j.base.TimeSource;

public final class Timing {

    // system time computed from NTP server response
    private final long ntpTime;

    // value of System.nanotime corresponding to mNtpTime in nanoseconds
    private final long ntpTimeReference;

    // round trip time in milliseconds
    private final long roundTripTime;

    public Timing(final long ntpTime, final long ntpTimeReference, final long roundTripTime) {
        this.ntpTime = ntpTime;
        this.ntpTimeReference = ntpTimeReference;
        this.roundTripTime = roundTripTime;
    }

    public long getNtpTime() {
        return ntpTime;
    }

    public long getNtpTimeReference() {
        return ntpTimeReference;
    }

    public long getRoundTripTime() {
        return roundTripTime;
    }

    /**
     * Get current Time based on the NTP timing info.
     * @return current time, as number of millis since EPOCH.
     */
    public long getTime() {
        return ntpTime + (TimeSource.nanoTime() / 1000000L - ntpTimeReference);
    }

    @Override
    public String toString() {
        return "Timing{" + "ntpTime=" + ntpTime + ", ntpTimeReference="
                + ntpTimeReference + ", roundTripTime=" + roundTripTime + '}';
    }

}