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 java.util.Collections;
  import java.util.List;
  import java.util.Map;
  import java.util.TreeSet;
  
  /**
   * The specification for a task which connects and disconnects many times a
   * second to stress the broker.
   */
  public final class ConnectionStressSpec extends TaskSpec {
      private final List<String> clientNodes;
      private final String bootstrapServers;
      private final Map<String, String> commonClientConf;
      private final int targetConnectionsPerSec;
      private final int numThreads;
      private final ConnectionStressAction action;
  
      enum ConnectionStressAction {
          CONNECT,
          FETCH_METADATA
      }
  
      @JsonCreator
      public ConnectionStressSpec(@JsonProperty("startMs") long startMs,
              @JsonProperty("durationMs") long durationMs,
              @JsonProperty("clientNode") List<String> clientNodes,
              @JsonProperty("bootstrapServers") String bootstrapServers,
              @JsonProperty("commonClientConf") Map<String, String> commonClientConf,
              @JsonProperty("targetConnectionsPerSec") int targetConnectionsPerSec,
              @JsonProperty("numThreads") int numThreads,
              @JsonProperty("action") ConnectionStressAction action) {
          super(startMs, durationMs);
          this.clientNodes = (clientNodes == null) ? Collections.emptyList() :
              List.copyOf(clientNodes);
          this.bootstrapServers = (bootstrapServers == null) ? "" : bootstrapServers;
          this.commonClientConf = configOrEmptyMap(commonClientConf);
          this.targetConnectionsPerSec = targetConnectionsPerSec;
          this.numThreads = numThreads < 1 ? 1 : numThreads;
          this.action = (action == null) ? ConnectionStressAction.CONNECT : action;
      }
  
      @JsonProperty
      public List<String> clientNode() {
          return clientNodes;
      }
  
      @JsonProperty
      public String bootstrapServers() {
          return bootstrapServers;
      }
  
      @JsonProperty
      public Map<String, String> commonClientConf() {
          return commonClientConf;
      }
  
      @JsonProperty
      public int targetConnectionsPerSec() {
          return targetConnectionsPerSec;
      }
  
      @JsonProperty
      public int numThreads() {
          return numThreads;
      }
  
      @JsonProperty
      public ConnectionStressAction action() {
          return action;
      }
  
      public TaskController newController(String id) {
          return topology -> new TreeSet<>(clientNodes);
      }
  
      @Override
      public TaskWorker newTaskWorker(String id) {
          return new ConnectionStressWorker(id, this);
      }
  }
  