exec/java-exec/src/test/java/org/apache/drill/exec/store/TestAffinityCalculator.java

/*
 * 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;

import org.apache.drill.exec.ExecTest;
import org.apache.hadoop.fs.BlockLocation;
import org.junit.Test;

import com.google.common.collect.ImmutableRangeMap;
import com.google.common.collect.Range;

public class TestAffinityCalculator extends ExecTest {
  private static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(TestAffinityCalculator.class);

  private final String port = "1234";

  public BlockLocation[] buildBlockLocations(String[] hosts, long blockSize) {
    String[] names = new String[hosts.length];

    for (int i = 0; i < hosts.length; i++) {
      hosts[i] = "host" + i;
      names[i] = "host:" + port;
    }

    BlockLocation[] blockLocations = new BlockLocation[3];
    blockLocations[0] = new BlockLocation(new String[]{names[0], names[1], names[2]}, new String[]{hosts[0], hosts[1], hosts[2]}, 0, blockSize);
    blockLocations[1] = new BlockLocation(new String[]{names[0], names[2], names[3]}, new String[]{hosts[0], hosts[2], hosts[3]}, blockSize, blockSize);
    blockLocations[2] = new BlockLocation(new String[]{names[0], names[1], names[3]}, new String[]{hosts[0], hosts[1], hosts[3]}, blockSize*2, blockSize);

    return blockLocations;
  }

  @Test
  public void testBuildRangeMap() {
    BlockLocation[] blocks = buildBlockLocations(new String[4], 256*1024*1024);
    long tA = System.nanoTime();
    ImmutableRangeMap.Builder<Long, BlockLocation> blockMapBuilder = new ImmutableRangeMap.Builder<Long,BlockLocation>();
    for (BlockLocation block : blocks) {
      long start = block.getOffset();
      long end = start + block.getLength();
      Range<Long> range = Range.closedOpen(start, end);
      blockMapBuilder = blockMapBuilder.put(range, block);
    }
    ImmutableRangeMap<Long,BlockLocation> map = blockMapBuilder.build();
    long tB = System.nanoTime();
    logger.info(String.format("Took %f ms to build range map", (tB - tA) / 1e6));
  }
}