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.tiered.storage.actions;
  
  import org.apache.kafka.clients.admin.AlterPartitionReassignmentsResult;
  import org.apache.kafka.clients.admin.NewPartitionReassignment;
  import org.apache.kafka.clients.admin.TopicDescription;
  import org.apache.kafka.common.ElectionType;
  import org.apache.kafka.common.Node;
  import org.apache.kafka.common.TopicPartition;
  import org.apache.kafka.common.TopicPartitionInfo;
  import org.apache.kafka.common.errors.UnknownTopicOrPartitionException;
  import org.apache.kafka.test.TestUtils;
  import org.apache.kafka.tiered.storage.TieredStorageTestAction;
  import org.apache.kafka.tiered.storage.TieredStorageTestContext;
  
  import java.io.PrintStream;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Map;
  import java.util.Optional;
  import java.util.Set;
  import java.util.concurrent.ExecutionException;
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.TimeoutException;
  import java.util.concurrent.atomic.AtomicInteger;
  
  import static org.apache.kafka.tiered.storage.utils.TieredStorageTestUtils.describeTopic;
  
  public final class ExpectLeaderAction implements TieredStorageTestAction {
  
      private final TopicPartition topicPartition;
      private final int replicaId;
      private final Boolean electLeader;
  
      public ExpectLeaderAction(TopicPartition topicPartition,
                                int replicaId,
                                Boolean electLeader) {
          this.topicPartition = topicPartition;
          this.replicaId = replicaId;
          this.electLeader = electLeader;
      }
  
      @Override
      public void doExecute(TieredStorageTestContext context) throws InterruptedException, ExecutionException, TimeoutException {
          String topic = topicPartition.topic();
          int partition = topicPartition.partition();
          TestUtils.waitForCondition(() -> {
              TopicDescription description = describeTopic(context, topic);
              List<Node> isr = description.partitions().get(partition).isr();
              return isr != null && isr.stream().anyMatch(node -> node.id() == replicaId);
          }, "Broker " + replicaId + " is out of sync for " + partition + ". Cannot be elected as leader.");
  
          reassignPartition(context);
          if (electLeader) {
              context.admin().electLeaders(ElectionType.PREFERRED, Set.of(topicPartition));
          }
          AtomicInteger actualLeader = new AtomicInteger(-1);
          TestUtils.waitForCondition(() -> {
              try {
                  TopicDescription description = describeTopic(context, topic);
                  actualLeader.set(
                          Optional.of(description.partitions().get(partition).leader()).map(Node::id).orElse(-1));
                  return replicaId == actualLeader.get();
              } catch (ExecutionException ex) {
                  if (ex.getCause() instanceof UnknownTopicOrPartitionException) {
                      return false;
                  }
                  throw new RuntimeException(ex);
              }
          }, "Leader of " + topicPartition + " was not " + replicaId + ". Actual leader: " + actualLeader);
      }
  
      @Override
      public void describe(PrintStream output) {
          output.printf("expect-leader: topic-partition: %s, replicaId: %d, electLeader: %s%n",
                  topicPartition, replicaId, electLeader);
      }
  
      private void reassignPartition(TieredStorageTestContext context) throws ExecutionException, InterruptedException, TimeoutException {
          String topic = topicPartition.topic();
          TopicPartitionInfo partitionInfo = describeTopic(context, topic)
                  .partitions()
                  .get(topicPartition.partition());
  
          List<Integer> targetReplicas = new ArrayList<>();
          targetReplicas.add(replicaId);
          partitionInfo.replicas().forEach(replica -> {
              if (replica.id() != replicaId) {
                  targetReplicas.add(replica.id());
              }
          });
  
          Map<TopicPartition, Optional<NewPartitionReassignment>> proposed =
                  Map.of(topicPartition, Optional.of(new NewPartitionReassignment(targetReplicas)));
          AlterPartitionReassignmentsResult result = context.admin().alterPartitionReassignments(proposed);
          result.all().get(30, TimeUnit.MINUTES);
      }
  }
  