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.coordinator.group.streams;
  
  import java.util.HashMap;
  import java.util.Map;
  
  /**
   * The various states that a member can be in. For their definition, refer to the documentation of
   * {{@link org.apache.kafka.coordinator.group.streams.CurrentAssignmentBuilder}}.
   */
  public enum MemberState {
  
      /**
       * The member is fully reconciled with the desired target assignment.
       */
      STABLE((byte) 1),
  
      /**
       * The member must revoke some tasks in order to be able to transition to the next epoch.
       */
      UNREVOKED_TASKS((byte) 2),
  
      /**
       * The member transitioned to the last epoch but waits on some tasks which have not been revoked by their previous owners yet.
       */
      UNRELEASED_TASKS((byte) 3),
  
      /**
       * The member is in an unknown state. This can only happen if a future version of the software introduces a new state unknown by this
       * version.
       */
      UNKNOWN((byte) 127);
  
      private static final Map<Byte, MemberState> VALUES_TO_ENUMS = new HashMap<>();
  
      static {
          for (MemberState state : MemberState.values()) {
              VALUES_TO_ENUMS.put(state.value(), state);
          }
      }
  
      private final byte value;
  
      MemberState(byte value) {
          this.value = value;
      }
  
      public byte value() {
          return value;
      }
  
      public static MemberState fromValue(byte value) {
          MemberState state = VALUES_TO_ENUMS.get(value);
          if (state == null) {
              return UNKNOWN;
          }
          return state;
      }
  }
  