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.workload;
  
  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 com.fasterxml.jackson.databind.JsonNode;
  import com.fasterxml.jackson.databind.node.NullNode;
  
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.List;
  import java.util.Optional;
  
  /**
   * ExternalCommandSpec describes a task that executes Trogdor tasks with the command.
   *
   * An example uses the python runner to execute the ProduceBenchSpec task.
   *
   * #{@code
   *   {
   *      "class": "org.apache.kafka.trogdor.workload.ExternalCommandSpec",
   *      "command": ["python", "/path/to/trogdor/python/runner"],
   *      "durationMs": 10000000,
   *      "producerNode": "node0",
   *      "workload": {
   *        "class": "org.apache.kafka.trogdor.workload.ProduceBenchSpec",
   *        "bootstrapServers": "localhost:9092",
   *        "targetMessagesPerSec": 10,
   *        "maxMessages": 100,
   *        "activeTopics": {
   *          "foo[1-3]": {
   *            "numPartitions": 3,
   *            "replicationFactor": 1
   *          }
   *        },
   *        "inactiveTopics": {
   *          "foo[4-5]": {
   *            "numPartitions": 3,
   *            "replicationFactor": 1
   *          }
   *        }
   *     }
   *   }
   */
  public class ExternalCommandSpec extends TaskSpec {
      private final String commandNode;
      private final List<String> command;
      private final JsonNode workload;
      private final Optional<Integer> shutdownGracePeriodMs;
  
      @JsonCreator
      public ExternalCommandSpec(
              @JsonProperty("startMs") long startMs,
              @JsonProperty("durationMs") long durationMs,
              @JsonProperty("commandNode") String commandNode,
              @JsonProperty("command") List<String> command,
              @JsonProperty("workload") JsonNode workload,
              @JsonProperty("shutdownGracePeriodMs") Optional<Integer> shutdownGracePeriodMs) {
          super(startMs, durationMs);
          this.commandNode = (commandNode == null) ? "" : commandNode;
          this.command = (command == null) ? Collections.unmodifiableList(new ArrayList<>()) : command;
          this.workload = (workload == null) ? NullNode.instance : workload;
          this.shutdownGracePeriodMs = shutdownGracePeriodMs;
      }
  
      @JsonProperty
      public String commandNode() {
          return commandNode;
      }
  
      @JsonProperty
      public List<String> command() {
          return command;
      }
  
      @JsonProperty
      public JsonNode workload() {
          return workload;
      }
  
      @JsonProperty
      public Optional<Integer> shutdownGracePeriodMs() {
          return shutdownGracePeriodMs;
      }
  
      @Override
      public TaskController newController(String id) {
          return topology -> Collections.singleton(commandNode);
      }
  
      @Override
      public TaskWorker newTaskWorker(String id) {
          return new ExternalCommandWorker(id, this);
      }
  }
  