org.apache.drill.exec.store.schedule.AffinityCreator.java Source code

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Here is the source code for org.apache.drill.exec.store.schedule.AffinityCreator.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.drill.exec.store.schedule;

import java.util.List;
import java.util.concurrent.TimeUnit;

import org.apache.drill.exec.physical.EndpointAffinity;
import org.apache.drill.exec.proto.CoordinationProtos.DrillbitEndpoint;

import com.carrotsearch.hppc.ObjectFloatOpenHashMap;
import com.carrotsearch.hppc.cursors.ObjectFloatCursor;
import com.carrotsearch.hppc.cursors.ObjectLongCursor;
import com.google.common.base.Stopwatch;
import com.google.common.collect.Lists;

public class AffinityCreator {
    static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(AffinityCreator.class);

    public static <T extends CompleteWork> List<EndpointAffinity> getAffinityMap(List<T> work) {
        Stopwatch watch = new Stopwatch();

        long totalBytes = 0;
        for (CompleteWork entry : work) {
            totalBytes += entry.getTotalBytes();
        }

        ObjectFloatOpenHashMap<DrillbitEndpoint> affinities = new ObjectFloatOpenHashMap<DrillbitEndpoint>();
        for (CompleteWork entry : work) {
            for (ObjectLongCursor<DrillbitEndpoint> cursor : entry.getByteMap()) {
                long bytes = cursor.value;
                float affinity = (float) bytes / (float) totalBytes;
                logger.debug("Work: {} Endpoint: {} Bytes: {}", work, cursor.key.getAddress(), bytes);
                affinities.putOrAdd(cursor.key, affinity, affinity);
            }
        }

        List<EndpointAffinity> affinityList = Lists.newLinkedList();
        for (ObjectFloatCursor<DrillbitEndpoint> d : affinities) {
            logger.debug("Endpoint {} has affinity {}", d.key.getAddress(), d.value);
            affinityList.add(new EndpointAffinity(d.key, d.value));
        }

        logger.debug("Took {} ms to get operator affinity", watch.elapsed(TimeUnit.MILLISECONDS));
        return affinityList;
    }
}