io.druid.server.coordinator.rules.PeriodLoadRule.java Source code

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Here is the source code for io.druid.server.coordinator.rules.PeriodLoadRule.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.server.coordinator.rules;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.collect.ImmutableMap;
import com.metamx.common.logger.Logger;
import io.druid.client.DruidServer;
import io.druid.timeline.DataSegment;
import org.joda.time.DateTime;
import org.joda.time.Interval;
import org.joda.time.Period;

import java.util.Map;

/**
 */
public class PeriodLoadRule extends LoadRule {
    private static final Logger log = new Logger(PeriodLoadRule.class);

    private final Period period;
    private final Map<String, Integer> tieredReplicants;

    @JsonCreator
    public PeriodLoadRule(@JsonProperty("period") Period period,
            @JsonProperty("tieredReplicants") Map<String, Integer> tieredReplicants) {
        this.tieredReplicants = tieredReplicants == null
                ? ImmutableMap.of(DruidServer.DEFAULT_TIER, DruidServer.DEFAULT_NUM_REPLICANTS)
                : tieredReplicants;
        validateTieredReplicants(this.tieredReplicants);
        this.period = period;
    }

    @Override
    @JsonProperty
    public String getType() {
        return "loadByPeriod";
    }

    @JsonProperty
    public Period getPeriod() {
        return period;
    }

    @Override
    @JsonProperty
    public Map<String, Integer> getTieredReplicants() {
        return tieredReplicants;
    }

    @Override
    public int getNumReplicants(String tier) {
        final Integer retVal = tieredReplicants.get(tier);
        return retVal == null ? 0 : retVal;
    }

    @Override
    public boolean appliesTo(DataSegment segment, DateTime referenceTimestamp) {
        return appliesTo(segment.getInterval(), referenceTimestamp);
    }

    @Override
    public boolean appliesTo(Interval interval, DateTime referenceTimestamp) {
        final Interval currInterval = new Interval(period, referenceTimestamp);
        return currInterval.overlaps(interval) && interval.getStartMillis() >= currInterval.getStartMillis();
    }
}