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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.cassandra.test.microbench;
  
  import java.io.IOException;
  import java.nio.ByteBuffer;
  import java.util.concurrent.TimeUnit;
  
  import org.apache.cassandra.db.BufferDecoratedKey;
  import org.apache.cassandra.dht.Murmur3Partitioner;
  import org.apache.cassandra.io.util.File;
  import org.apache.cassandra.io.util.FileInputStreamPlus;
  import org.apache.cassandra.io.util.FileOutputStreamPlus;
  import org.apache.cassandra.io.util.FileUtils;
  import org.apache.cassandra.utils.BloomFilter;
  import org.apache.cassandra.utils.BloomFilterSerializer;
  import org.apache.cassandra.utils.FilterFactory;
  import org.apache.cassandra.utils.IFilter;
  import org.apache.cassandra.utils.SerializationsTest;
  import org.openjdk.jmh.annotations.Benchmark;
  import org.openjdk.jmh.annotations.BenchmarkMode;
  import org.openjdk.jmh.annotations.Fork;
  import org.openjdk.jmh.annotations.Measurement;
  import org.openjdk.jmh.annotations.Mode;
  import org.openjdk.jmh.annotations.OutputTimeUnit;
  import org.openjdk.jmh.annotations.Param;
  import org.openjdk.jmh.annotations.Scope;
  import org.openjdk.jmh.annotations.State;
  import org.openjdk.jmh.annotations.Warmup;
  
  @BenchmarkMode(Mode.AverageTime)
  @OutputTimeUnit(TimeUnit.MICROSECONDS)
  @Warmup(iterations = 1, time = 1, timeUnit = TimeUnit.SECONDS)
  @Measurement(iterations = 2, time = 4, timeUnit = TimeUnit.SECONDS)
  @Fork(value = 2)
  @State(Scope.Benchmark)
  public class BloomFilterSerializerBench
  {
      @Param({"1", "10", "100", "1024"})
      private long numElemsInK;
  
      @Param({"true", "false"})
      public boolean oldBfFormat;
  
      static final IFilter.FilterKey wrap(ByteBuffer buf)
      {
          return new BufferDecoratedKey(new Murmur3Partitioner.LongToken(0L), buf);
      }
  
      private ByteBuffer testVal = ByteBuffer.wrap(new byte[] { 0, 1});
  
      private static final BloomFilterSerializer serializer = BloomFilterSerializer.forVersion(false);
  
      @Benchmark
      public void serializationTest() throws IOException
      {
          File file = FileUtils.createTempFile("bloomFilterTest-", ".dat");
          try
          {
              BloomFilter filter = (BloomFilter) FilterFactory.getFilter(numElemsInK * 1024, 0.01d);
              filter.add(wrap(testVal));
              FileOutputStreamPlus out = new FileOutputStreamPlus(file);
              if (oldBfFormat)
                  SerializationsTest.serializeOldBfFormat(filter, out);
              else
                  serializer.serialize(filter, out);
              out.close();
              filter.close();
  
              FileInputStreamPlus in = new FileInputStreamPlus(file);
              BloomFilter filter2 = BloomFilterSerializer.forVersion(oldBfFormat).deserialize(in);
              FileUtils.closeQuietly(in);
              filter2.close();
          }
          finally
          {
              file.tryDelete();
          }
      }
  
  }
  