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.kafka.jmh.acl;
  
  import org.apache.kafka.common.Uuid;
  import org.apache.kafka.common.resource.PatternType;
  import org.apache.kafka.common.resource.ResourcePattern;
  import org.apache.kafka.common.resource.ResourceType;
  import org.apache.kafka.common.security.auth.KafkaPrincipal;
  import org.apache.kafka.metadata.authorizer.StandardAcl;
  import org.apache.kafka.metadata.authorizer.StandardAclWithId;
  import org.apache.kafka.metadata.authorizer.StandardAuthorizer;
  
  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.Param;
  import org.openjdk.jmh.annotations.Scope;
  import org.openjdk.jmh.annotations.Setup;
  import org.openjdk.jmh.annotations.State;
  import org.openjdk.jmh.annotations.TearDown;
  import org.openjdk.jmh.annotations.Warmup;
  
  import java.io.IOException;
  import java.util.Collection;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Random;
  import java.util.Set;
  import java.util.concurrent.TimeUnit;
  import java.util.stream.Collectors;
  import java.util.stream.IntStream;
  
  import static org.apache.kafka.common.acl.AclOperation.READ;
  import static org.apache.kafka.common.acl.AclPermissionType.ALLOW;
  
  @State(Scope.Benchmark)
  @Fork(value = 1)
  @Warmup(iterations = 0)
  @Measurement(iterations = 4)
  @BenchmarkMode(Mode.AverageTime)
  @OutputTimeUnit(TimeUnit.MILLISECONDS)
  public class StandardAuthorizerUpdateBenchmark {
      private static final Random RANDOM = new Random(System.currentTimeMillis());
      private static final KafkaPrincipal PRINCIPAL = new KafkaPrincipal(KafkaPrincipal.USER_TYPE, "test-user");
  
      private final String resourceNamePrefix = "foo-bar35_resource-";
      private final Set<Uuid> ids = new HashSet<>();
      private final List<StandardAclWithId> aclsToAdd = prepareAcls();
  
      private StandardAuthorizer authorizer;
      @Param({"25000", "50000", "75000", "100000"})
      private int aclCount;
      int index = 0;
  
      @Setup(Level.Trial)
      public void setup() throws Exception {
          authorizer = new StandardAuthorizer();
          addAcls(aclCount);
      }
  
      @TearDown(Level.Trial)
      public void tearDown() throws IOException {
          authorizer.close();
      }
  
      @Benchmark
      public void testAddAcl() {
          StandardAclWithId aclWithId = aclsToAdd.get(index++);
          authorizer.addAcl(aclWithId.id(), aclWithId.acl());
      }
  
      private List<StandardAclWithId> prepareAcls() {
          return IntStream.range(0, 10000)
              .mapToObj(i -> {
                  ResourceType resourceType = RANDOM.nextInt(10) > 7 ? ResourceType.GROUP : ResourceType.TOPIC;
                  String resourceName = resourceNamePrefix + i;
                  ResourcePattern resourcePattern = new ResourcePattern(resourceType, resourceName, PatternType.LITERAL);
                  return aclsForResource(resourcePattern);
              })
              .flatMap(Collection::stream)
              .collect(Collectors.toList());
      }
  
      private List<StandardAclWithId> aclsForResource(ResourcePattern pattern) {
          return IntStream.range(1, 256)
              .mapToObj(i -> {
                  String p = PRINCIPAL.toString() + RANDOM.nextInt(100);
                  String h = "127.0.0." + i;
                  return new StandardAcl(pattern.resourceType(), pattern.name(), pattern.patternType(), p, h, READ, ALLOW);
              })
              .map(this::withId)
              .collect(Collectors.toList());
      }
  
      private StandardAclWithId withId(StandardAcl acl) {
          Uuid id = new Uuid(acl.hashCode(), acl.hashCode());
          while (ids.contains(id)) {
              id = Uuid.randomUuid();
          }
          ids.add(id);
          return new StandardAclWithId(id, acl);
      }
  
      private void addAcls(int num) {
          IntStream.range(0, num)
              .mapToObj(aclsToAdd::get)
              .forEach(aclWithId -> {
                  authorizer.addAcl(aclWithId.id(), aclWithId.acl());
                  index++;
              });
      }
  }
  