content: /*
   * 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.net.InetAddress;
  import java.net.UnknownHostException;
  import java.util.Arrays;
  import java.util.List;
  import java.util.Random;
  import java.util.concurrent.TimeUnit;
  
  import org.apache.cassandra.auth.CIDRGroupsMappingTable;
  import org.apache.cassandra.cql3.CIDR;
  import org.openjdk.jmh.annotations.Benchmark;
  import org.openjdk.jmh.annotations.BenchmarkMode;
  import org.openjdk.jmh.annotations.Fork;
  import org.openjdk.jmh.annotations.Level;
  import org.openjdk.jmh.annotations.Measurement;
  import org.openjdk.jmh.annotations.Mode;
  import org.openjdk.jmh.annotations.OutputTimeUnit;
  import org.openjdk.jmh.annotations.Scope;
  import org.openjdk.jmh.annotations.Setup;
  import org.openjdk.jmh.annotations.State;
  import org.openjdk.jmh.annotations.Threads;
  import org.openjdk.jmh.annotations.Warmup;
  
  /**
   * Benchmark algorithm(s) of the Longest matching CIDR for given IP
   */
  @BenchmarkMode(Mode.AverageTime)
  @OutputTimeUnit(TimeUnit.NANOSECONDS)
  @Warmup(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
  @Measurement(iterations = 30, time = 2, timeUnit = TimeUnit.SECONDS)
  @Fork(value = 1, jvmArgsAppend = { "-Xmx512M", "-Djmh.executor=CUSTOM", "-Djmh.executor.class=org.apache.cassandra.test.microbench.FastThreadExecutor" })
  @Threads(4) // make sure this matches the number of _physical_cores_
  @State(Scope.Benchmark)
  public class LongestMatchingCIDRBench
  {
      CIDRGroupsMappingTable<String> ipv4CidrGroupsMappingTable;
      static Random random = new Random();
  
      static List<String> cidrsToInsert = Arrays.asList("100.90.80.70/14",
                                                        "110.100.90.80/15",
                                                        "120.110.100.90/15",
                                                        "130.120.110.100/15",
                                                        "140.130.120.110/15",
                                                        "150.140.130.120/16",
                                                        "160.150.140.130/16",
                                                        "170.160.150.140/16",
                                                        "180.170.160.150/16",
                                                        "190.180.170.160/16",
                                                        "200.190.180.170/16",
                                                        "210.200.190.180/16",
                                                        "220.210.200.190/17",
                                                        "230.220.210.200/17",
                                                        "240.230.220.210/17",
                                                        "250.240.230.220/18",
                                                        "255.250.240.230/18");
  
      static List<String> ipsNotInserted = Arrays.asList("15.15.15.15",
                                                         "16.16.16.16",
                                                         "255.255.255.255",
                                                         "200.0.0.0",
                                                         "18.18.18.18",
                                                         "19.19.19.19",
                                                         "20.20.20.20",
                                                         "21.21.21.21",
                                                         "22.22.22.22",
                                                         "23.23.23.23",
                                                         "24.24.24.24",
                                                         "25.25.25.25",
                                                         "26.26.26.26",
                                                         "27.27.27.27",
                                                         "28.28.28.28",
                                                         "29.29.29.29",
                                                         "30.30.30.30");
  
      @Setup(Level.Trial)
      public void setup()
      {
          CIDRGroupsMappingTable.Builder<String> ipv4CidrGroupsMappingTableBuilder = CIDRGroupsMappingTable.builder(false);
  
          for (String cidr : cidrsToInsert)
          {
              ipv4CidrGroupsMappingTableBuilder.add(CIDR.getInstance(cidr), cidr);
          }
          ipv4CidrGroupsMappingTable = ipv4CidrGroupsMappingTableBuilder.build();
      }
  
      @State(Scope.Thread)
      public static class StateWithExistingCIDR
      {
          InetAddress ipAddr;
  
          @Setup
          public void setupStateWithExistingCidr() throws UnknownHostException
          {
              ipAddr = InetAddress.getByName(cidrsToInsert.get(random.nextInt(cidrsToInsert.size())).split("/")[0]);
          }
      }
  
      @State(Scope.Thread)
      public static class StateWithNonExistingCIDR
      {
          InetAddress ipAddr;
  
          @Setup
          public void setupStateWithNonExistingCidr() throws UnknownHostException
          {
              ipAddr = InetAddress.getByName(ipsNotInserted.get(random.nextInt(ipsNotInserted.size())));
          }
      }
  
      @Benchmark
      public void benchLongestMatchingCidr_CidrExistsCase(StateWithExistingCIDR state)
      {
          ipv4CidrGroupsMappingTable.lookupLongestMatchForIP(state.ipAddr);
      }
  
      @Benchmark
      public void benchLongestMatchingCidr_CidrNotExistsCase(StateWithNonExistingCIDR state)
      {
          ipv4CidrGroupsMappingTable.lookupLongestMatchForIP(state.ipAddr);
      }
  }
  