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/**
 * The MIT License
 * Copyright (c) 2012 Graylog, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.graylog2.plugin;

import org.joda.time.DateTime;
import org.joda.time.DateTimeUtils;
import org.joda.time.Period;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class InstantMillisProvider implements DateTimeUtils.MillisProvider {
    private static final Logger log = LoggerFactory.getLogger(InstantMillisProvider.class);
    private DateTime currentTick;

    public InstantMillisProvider(DateTime instant) {
        setTimeTo(instant);
    }

    public void setTimeTo(DateTime instant) {
        log.debug("Setting clock to {}", instant);
        currentTick = instant;
    }

    @Override
    public long getMillis() {
        return currentTick.getMillis();
    }

    public void tick(Period period) {
        currentTick = currentTick.plus(period);
        log.debug("Ticking clock by {} to {}", period, currentTick);
    }
}