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.UnknownHostException;
  import java.util.Collections;
  import java.util.Random;
  import java.util.UUID;
  import java.util.concurrent.TimeUnit;
  
  import org.apache.cassandra.config.DatabaseDescriptor;
  import org.apache.cassandra.dht.Murmur3Partitioner;
  import org.apache.cassandra.dht.Token;
  import org.apache.cassandra.distributed.api.TokenSupplier;
  import org.apache.cassandra.locator.InetAddressAndPort;
  import org.apache.cassandra.schema.KeyspaceMetadata;
  import org.apache.cassandra.schema.KeyspaceParams;
  import org.apache.cassandra.schema.Keyspaces;
  import org.apache.cassandra.schema.ReplicationParams;
  import org.apache.cassandra.tcm.ClusterMetadata;
  import org.apache.cassandra.tcm.Epoch;
  import org.apache.cassandra.tcm.membership.Location;
  import org.apache.cassandra.tcm.membership.NodeAddresses;
  import org.apache.cassandra.tcm.membership.NodeId;
  import org.apache.cassandra.tcm.membership.NodeVersion;
  import org.apache.cassandra.tcm.ownership.ReplicaGroups;
  import org.apache.cassandra.tcm.ownership.PlacementProvider;
  import org.apache.cassandra.tcm.ownership.UniformRangePlacement;
  import org.apache.cassandra.tcm.transformations.UnsafeJoin;
  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.Warmup;
  import org.openjdk.jmh.runner.Runner;
  import org.openjdk.jmh.runner.RunnerException;
  import org.openjdk.jmh.runner.options.Options;
  import org.openjdk.jmh.runner.options.OptionsBuilder;
  
  @State(Scope.Benchmark)
  @BenchmarkMode(Mode.AverageTime)
  @OutputTimeUnit(TimeUnit.MILLISECONDS)
  @Fork(value = 1)
  @Warmup(iterations = 5, timeUnit = TimeUnit.MILLISECONDS, time = 5000)
  @Measurement(iterations = 5, timeUnit = TimeUnit.MILLISECONDS, time = 5000)
  public class ReplicaGroupsBench
  {
      static Token [] queryTokens = new Token[5000];
      static Random random = new Random(1);
      static ReplicaGroups replicaGroups;
  /*
  new: ReplicaGroupBench.bench  avgt    5  0,317 ± 0,037  ms/op
  
  old: ReplicaGroupBench.bench  avgt    5  10,187 ± 0,040  ms/op
  
   */
      @Setup(Level.Trial)
      public void setup() throws UnknownHostException
      {
          int nodecount = 1000;
          DatabaseDescriptor.daemonInitialization();
          for (int i = 0; i < 5000; i++)
              queryTokens[i] = Murmur3Partitioner.instance.getRandomToken(random);
          Keyspaces keyspaces = fakeKeyspaces(6);
          ReplicationParams params = keyspaces.get("pfrbench").get().params.replication;
          replicaGroups = new UniformRangePlacement().calculatePlacements(Epoch.FIRST, fakeMetadata(nodecount), keyspaces).get(params).reads;
      }
  
      @Benchmark
      public void bench()
      {
          for (Token t : queryTokens)
              replicaGroups.forRange(t);
      }
  
      public ClusterMetadata fakeMetadata(int nodeCount) throws UnknownHostException
      {
          ClusterMetadata metadata = new ClusterMetadata(Murmur3Partitioner.instance);
          TokenSupplier tokensupplier = TokenSupplier.evenlyDistributedTokens(nodeCount);
          PlacementProvider placementProvider = new UniformRangePlacement();
          for (int i = 1; i < nodeCount; i++)
          {
              ClusterMetadata.Transformer transformer = metadata.transformer();
              UUID uuid = UUID.randomUUID();
              NodeAddresses addresses = addresses(uuid, i);
              metadata = transformer.register(addresses, new Location("dc1", "rack1"), NodeVersion.CURRENT).build().metadata;
              NodeId nodeId = metadata.directory.peerId(addresses.broadcastAddress);
              metadata = new UnsafeJoin(nodeId, Collections.singleton(new Murmur3Partitioner.LongToken(tokensupplier.token(i))), placementProvider).execute(metadata).success().metadata;
          }
  
          return metadata;
      }
  
      NodeAddresses addresses(UUID uuid, int idx) throws UnknownHostException
      {
          byte [] address = new byte [] {127, 0,
                                         (byte) (((idx + 1) & 0x0000ff00) >> 8),
                                         (byte) ((idx + 1) & 0x000000ff)};
  
          InetAddressAndPort host = InetAddressAndPort.getByAddress(address);
          return new NodeAddresses(uuid, host, host, host);
      }
  
      public Keyspaces fakeKeyspaces(int rf)
      {
          KeyspaceMetadata metadata = KeyspaceMetadata.create("pfrbench", KeyspaceParams.simple(rf));
          return Keyspaces.of(metadata);
      }
      public static void main(String[] args) throws RunnerException
      {
          Options options = new OptionsBuilder()
                            .include(ReplicaGroupsBench.class.getSimpleName())
                            .build();
          new Runner(options).run();
      }
  }
  