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.connect.health;
  
  import org.apache.kafka.common.utils.Utils;
  
  import java.util.Objects;
  
  /**
   * Provides the current status for a connector or a task, along with an identifier for its Connect worker
   */
  public abstract class AbstractState {
  
      private final String state;
      private final String traceMessage;
      private final String workerId;
  
      /**
       * Construct a state for a connector or task.
       *
       * @param state the status of a connector or task; may not be null or empty
       * @param workerId the workerId associated with the connector or the task; may not be null or empty
       * @param traceMessage any error trace message associated with the connector or the task; may be null or empty
       */
      public AbstractState(String state, String workerId, String traceMessage) {
          if (Utils.isBlank(state)) {
              throw new IllegalArgumentException("State must not be null or empty");
          }
          if (Utils.isBlank(workerId)) {
              throw new IllegalArgumentException("Worker ID must not be null or empty");
          }
          this.state = state;
          this.workerId = workerId;
          this.traceMessage = traceMessage;
      }
  
      /**
       * Provides the current state of the connector or task.
       *
       * @return state, never {@code null} or empty
       */
      public String state() {
          return state;
      }
  
      /**
       * The identifier of the worker associated with the connector or the task.
       *
       * @return workerId, never {@code null} or empty.
       */
      public String workerId() {
          return workerId;
      }
  
      /**
       * The error message associated with the connector or task.
       *
       * @return traceMessage, can be {@code null} or empty.
       */
      public String traceMessage() {
          return traceMessage;
      }
  
      @Override
      public boolean equals(Object o) {
          if (this == o)
              return true;
          if (o == null || getClass() != o.getClass())
              return false;
          AbstractState that = (AbstractState) o;
          return state.equals(that.state)
              && Objects.equals(traceMessage, that.traceMessage)
              && workerId.equals(that.workerId);
      }
  
      @Override
      public int hashCode() {
          return Objects.hash(state, traceMessage, workerId);
      }
  }
  