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   * 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.cassandra.tcm.sequences;
  
  import java.util.stream.StreamSupport;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import org.apache.cassandra.config.DatabaseDescriptor;
  import org.apache.cassandra.db.ColumnFamilyStore;
  import org.apache.cassandra.db.SystemKeyspace;
  import org.apache.cassandra.gms.Gossiper;
  import org.apache.cassandra.locator.EndpointsByReplica;
  import org.apache.cassandra.locator.InetAddressAndPort;
  import org.apache.cassandra.repair.autorepair.AutoRepairUtils;
  import org.apache.cassandra.schema.Schema;
  import org.apache.cassandra.service.StorageService;
  import org.apache.cassandra.tcm.ClusterMetadata;
  import org.apache.cassandra.tcm.membership.NodeId;
  import org.apache.cassandra.tcm.ownership.MovementMap;
  
  public class ReplaceSameAddress
  {
      private static final Logger logger = LoggerFactory.getLogger(ReplaceSameAddress.class);
  
      public static MovementMap movementMap(NodeId nodeId, ClusterMetadata metadata)
      {
          MovementMap.Builder builder = MovementMap.builder();
          InetAddressAndPort addr = metadata.directory.endpoint(nodeId);
          metadata.placements.forEach((params, placement) -> {
              EndpointsByReplica.Builder sources = new EndpointsByReplica.Builder();
              placement.reads.byEndpoint().get(addr).forEach(destination -> {
                  placement.reads.forRange(destination.range()).forEach(potentialSource -> {
                      if (!potentialSource.endpoint().equals(addr))
                          sources.put(destination, potentialSource);
                  });
              });
              builder.put(params, sources.build());
          });
          return builder.build();
      }
  
      public static void streamData(NodeId nodeId, ClusterMetadata metadata, boolean shouldBootstrap, boolean finishJoiningRing)
      {
          BootstrapAndReplace.checkUnsafeReplace(shouldBootstrap);
  
          //only go into hibernate state if replacing the same address (CASSANDRA-8523)
          logger.warn("Writes will not be forwarded to this node during replacement because it has the same address as " +
                      "the node to be replaced ({}). If the previous node has been down for longer than max_hint_window, " +
                      "repair must be run after the replacement process in order to make this node consistent.",
                      DatabaseDescriptor.getReplaceAddress());
  
          BootstrapAndReplace.gossipStateToHibernate(metadata, nodeId);
  
          SystemKeyspace.updateLocalTokens(metadata.tokenMap.tokens(nodeId));
  
          if (shouldBootstrap)
          {
              boolean dataAvailable = BootstrapAndJoin.bootstrap(metadata.tokenMap.tokens(nodeId),
                                                                 StorageService.INDEFINITE,
                                                                 metadata,
                                                                 metadata.directory.endpoint(nodeId),
                                                                 movementMap(nodeId, metadata),
                                                                 null);
  
              if (!dataAvailable)
              {
                  logger.warn("Some data streaming failed. Use nodetool to check bootstrap state and resume. " +
                              "For more, see `nodetool help bootstrap`. {}", SystemKeyspace.getBootstrapState());
                  throw new IllegalStateException("Could not finish join for during replacement");
              }
          }
  
          if (finishJoiningRing)
          {
              SystemKeyspace.setBootstrapState(SystemKeyspace.BootstrapState.COMPLETED);
              StreamSupport.stream(ColumnFamilyStore.all().spliterator(), false)
                           .filter(cfs -> Schema.instance.getUserKeyspaces().names().contains(cfs.keyspace.getName()))
                           .forEach(cfs -> cfs.indexManager.executePreJoinTasksBlocking(true));
              BootstrapAndReplace.gossipStateToNormal(metadata, metadata.myNodeId());
              Gossiper.instance.mergeNodeToGossip(metadata.myNodeId(), metadata);
  
              // this node might have just bootstrapped; check if we should run repair immediately
              AutoRepairUtils.runRepairOnNewlyBootstrappedNodeIfEnabled();
          }
      }
  }
  