io.druid.segment.realtime.plumber.MessageTimeRejectionPolicyFactory.java Source code

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Here is the source code for io.druid.segment.realtime.plumber.MessageTimeRejectionPolicyFactory.java

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/*
 * Druid - a distributed column store.
 * Copyright 2012 - 2015 Metamarkets Group Inc.
 *
 * 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 io.druid.segment.realtime.plumber;

import io.druid.common.utils.JodaUtils;
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 = JodaUtils.MIN_INSTANT;

            @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);
            }
        };
    }
}