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.trogdor.fault;
  
  import org.apache.kafka.trogdor.task.TaskController;
  import org.apache.kafka.trogdor.task.TaskSpec;
  import org.apache.kafka.trogdor.task.TaskWorker;
  
  import com.fasterxml.jackson.annotation.JsonCreator;
  import com.fasterxml.jackson.annotation.JsonProperty;
  
  import java.util.ArrayList;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Set;
  
  /**
   * The specification for a fault that creates a network partition.
   */
  public class NetworkPartitionFaultSpec extends TaskSpec {
      private final List<List<String>> partitions;
  
      @JsonCreator
      public NetworkPartitionFaultSpec(@JsonProperty("startMs") long startMs,
                           @JsonProperty("durationMs") long durationMs,
                           @JsonProperty("partitions") List<List<String>> partitions) {
          super(startMs, durationMs);
          this.partitions = partitions == null ? new ArrayList<>() : partitions;
      }
  
      @JsonProperty
      public List<List<String>> partitions() {
          return partitions;
      }
  
      @Override
      public TaskController newController(String id) {
          return new NetworkPartitionFaultController(partitionSets());
      }
  
      @Override
      public TaskWorker newTaskWorker(String id) {
          return new NetworkPartitionFaultWorker(id, partitionSets());
      }
  
      private List<Set<String>> partitionSets() {
          List<Set<String>> partitionSets = new ArrayList<>();
          HashSet<String> prevNodes = new HashSet<>();
          for (List<String> partition : this.partitions()) {
              for (String nodeName : partition) {
                  if (prevNodes.contains(nodeName)) {
                      throw new RuntimeException("Node " + nodeName +
                          " appears in more than one partition.");
                  }
                  prevNodes.add(nodeName);
                  partitionSets.add(new HashSet<>(partition));
              }
          }
          return partitionSets;
      }
  }
  