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.rest;
  
  import org.apache.kafka.common.KafkaException;
  import org.apache.kafka.trogdor.task.TaskSpec;
  
  import com.fasterxml.jackson.annotation.JsonProperty;
  import com.fasterxml.jackson.annotation.JsonSubTypes;
  import com.fasterxml.jackson.annotation.JsonTypeInfo;
  import com.fasterxml.jackson.databind.JsonNode;
  
  /**
   * The state which a worker is in on the Agent.
   */
  @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, property = "state")
  @JsonSubTypes(value = {
      @JsonSubTypes.Type(value = WorkerReceiving.class, name = "RECEIVING"),
      @JsonSubTypes.Type(value = WorkerStarting.class, name = "STARTING"),
      @JsonSubTypes.Type(value = WorkerRunning.class, name = "RUNNING"),
      @JsonSubTypes.Type(value = WorkerStopping.class, name = "STOPPING"),
      @JsonSubTypes.Type(value = WorkerDone.class, name = "DONE")
      })
  public abstract class WorkerState extends Message {
      private final String taskId;
      private final TaskSpec spec;
  
      public WorkerState(String taskId, TaskSpec spec) {
          this.taskId = taskId;
          this.spec = spec;
      }
  
      @JsonProperty
      public String taskId() {
          return taskId;
      }
  
      @JsonProperty
      public TaskSpec spec() {
          return spec;
      }
  
      public boolean stopping() {
          return false;
      }
  
      public boolean done() {
          return false;
      }
  
      public long startedMs() {
          throw new KafkaException("invalid state");
      }
  
      public abstract JsonNode status();
  
      public boolean running() {
          return false;
      }
  }
  