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.bifromq.basekv.balance.utils;
  
  import org.apache.bifromq.basekv.proto.KVRangeDescriptor;
  import org.apache.bifromq.basekv.proto.KVRangeId;
  import org.apache.bifromq.basekv.proto.State.StateType;
  import org.apache.bifromq.basekv.raft.proto.ClusterConfig;
  import org.apache.bifromq.basekv.raft.proto.RaftNodeStatus;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Set;
  
  public class DescriptorUtils {
  
      public static List<KVRangeDescriptor> generateRangeDesc(KVRangeId id,
                                                              long ver,
                                                              Set<String> voters,
                                                              Set<String> learner) {
          List<KVRangeDescriptor> descriptors = new ArrayList<>();
          for (int i = 0; i < voters.size() + learner.size(); i++) {
              RaftNodeStatus raftNodeStatus = i == 0 ? RaftNodeStatus.Leader : RaftNodeStatus.Follower;
              KVRangeDescriptor rangeDescriptor = KVRangeDescriptor.newBuilder()
                  .setId(id)
                  .setState(StateType.Normal)
                  .setRole(raftNodeStatus)
                  .setVer(ver)
                  .setConfig(ClusterConfig.newBuilder()
                      .addAllVoters(voters)
                      .addAllLearners(learner)
                      .build()
                  ).build();
              descriptors.add(rangeDescriptor);
          }
          return descriptors;
      }
  }
  