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.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;
  import com.fasterxml.jackson.databind.node.NullNode;
  
  /**
   * The state which a task is in on the Coordinator.
   */
  @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, property = "state")
  @JsonSubTypes({
      @JsonSubTypes.Type(value = TaskPending.class, name = TaskStateType.Constants.PENDING_VALUE),
      @JsonSubTypes.Type(value = TaskRunning.class, name = TaskStateType.Constants.RUNNING_VALUE),
      @JsonSubTypes.Type(value = TaskStopping.class, name = TaskStateType.Constants.STOPPING_VALUE),
      @JsonSubTypes.Type(value = TaskDone.class, name = TaskStateType.Constants.DONE_VALUE)
  })
  public abstract class TaskState extends Message {
      private final TaskSpec spec;
  
      private final JsonNode status;
  
      public TaskState(TaskSpec spec, JsonNode status) {
          this.spec = spec;
          this.status = status == null ? NullNode.instance : status;
      }
  
      @JsonProperty
      public TaskSpec spec() {
          return spec;
      }
  
      @JsonProperty
      public JsonNode status() {
          return status;
      }
  
      public abstract TaskStateType stateType();
  }
  