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.asterix.common.api;
  
  public interface IClusterManagementWork {
  
      enum WorkType {
          ADD_NODE,
          REMOVE_NODE
      }
  
      enum ClusterState {
          UNUSABLE, // one or more cluster partitions are inactive or max id resources have not been reported
          PENDING, // the metadata node has not yet joined & initialized
          RECOVERING, // global recovery has not yet completed
          ACTIVE, // cluster is ACTIVE and ready for requests
          SHUTTING_DOWN, // a shutdown request has been received, and is underway
          REBALANCE_REQUIRED // one or more datasets require rebalance before the cluster is usable
      }
  
      WorkType getClusterManagementWorkType();
  
      int getWorkId();
  
      IClusterEventsSubscriber getSourceSubscriber();
  }
  