com.metamx.druid.realtime.plumber.MessageTimeRejectionPolicyFactory.java Source code

Introduction

Here is the source code for com.metamx.druid.realtime.plumber.MessageTimeRejectionPolicyFactory.java

Source

/*
 * Druid - a distributed column store.
 * Copyright (C) 2012  Metamarkets Group Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

package com.metamx.druid.realtime.plumber;

import org.joda.time.DateTime;
import org.joda.time.Period;

public class MessageTimeRejectionPolicyFactory implements RejectionPolicyFactory {
    @Override
    public RejectionPolicy create(final Period windowPeriod) {
        final long windowMillis = windowPeriod.toStandardDuration().getMillis();

        return new RejectionPolicy() {
            private volatile long maxTimestamp = Long.MIN_VALUE;

            @Override
            public DateTime getCurrMaxTime() {
                return new DateTime(maxTimestamp);
            }

            @Override
            public boolean accept(long timestamp) {
                maxTimestamp = Math.max(maxTimestamp, timestamp);

                return timestamp >= (maxTimestamp - windowMillis);
            }

            @Override
            public String toString() {
                return String.format("messageTime-%s", windowPeriod);
            }
        };
    }
}