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.cassandra.service.reads.range;
  
  import java.net.UnknownHostException;
  import java.util.List;
  import java.util.Set;
  
  import com.google.common.collect.HashMultimap;
  import com.google.common.collect.ImmutableList;
  import com.google.common.collect.Multimap;
  import com.google.common.collect.Sets;
  
  import org.apache.cassandra.Util;
  import org.apache.cassandra.dht.Murmur3Partitioner;
  import org.apache.cassandra.dht.Token;
  import org.apache.cassandra.distributed.test.log.ClusterMetadataTestHelper;
  import org.apache.cassandra.locator.InetAddressAndPort;
  import org.apache.cassandra.tcm.ClusterMetadata;
  import org.apache.cassandra.tcm.membership.NodeId;
  import org.apache.cassandra.tcm.membership.NodeState;
  import org.apache.cassandra.utils.FBUtilities;
  
  /**
   * Test utility class to set the partitioning tokens in the cluster.
   *
   * The per-endpoint tokens to be set can be specified with the {@code withTokens} and {@code withKeys} methods.
   * The {@link #update()} method will apply the changes, cleaning the previous token metadata info.
   */
  public class TokenUpdater
  {
      private final Multimap<InetAddressAndPort, Token> endpointTokens = HashMultimap.create();
  
      public TokenUpdater withTokens(long... values)
      {
          return withTokens(localEndpoint(), values);
      }
  
      public TokenUpdater withTokens(String endpoint, long... values)
      {
          return withTokens(endpointByName(endpoint), values);
      }
  
      public TokenUpdater withTokens(InetAddressAndPort endpoint, long... values)
      {
          for (long val : values)
              endpointTokens.put(endpoint, new Murmur3Partitioner.LongToken(val));
          return this;
      }
  
      public TokenUpdater withTokens(InetAddressAndPort endpoint, Token... tokens)
      {
          for (Token token : tokens)
              endpointTokens.put(endpoint, token);
          return this;
      }
  
      public TokenUpdater withKeys(int... keys)
      {
          return withKeys(localEndpoint(), keys);
      }
  
      public TokenUpdater withKeys(String endpoint, int... values)
      {
          return withKeys(endpointByName(endpoint), values);
      }
  
      public TokenUpdater withKeys(InetAddressAndPort endpoint, int... keys)
      {
          for (int key : keys)
              endpointTokens.put(endpoint, Util.token(key));
          return this;
      }
  
      public TokenUpdater withKeys(String... keys)
      {
          return withKeys(localEndpoint(), keys);
      }
  
      public TokenUpdater withKeys(InetAddressAndPort endpoint, String... keys)
      {
          for (String key : keys)
              endpointTokens.put(endpoint, Util.token(key));
          return this;
      }
  
      public TokenUpdater update()
      {
          for (InetAddressAndPort ep : endpointTokens.keySet())
          {
              NodeId id = ClusterMetadata.current().directory.peerId(ep);
              if (id == null)
                  ClusterMetadataTestHelper.register(ep);
  
              Set<Token> tokens = Sets.newHashSet(endpointTokens.get(ep));
              NodeState state = ClusterMetadata.current().directory.peerState(ep);
              switch(state)
              {
                  case REGISTERED:
                      ClusterMetadataTestHelper.join(ep, tokens);
                      break;
                  case JOINED:
                      // note: this would be illegal outside of tests, as move is restricted to single tokens
                      ClusterMetadataTestHelper.lazyMove(ep, tokens).prepareMove().startMove().midMove().finishMove();
                      break;
                  default:
                      throw new IllegalStateException("Cannot update tokens for " + ep + " as it is in state: " + state);
              }
          }
          return this;
      }
  
      public List<Token> getTokens()
      {
          return getTokens(localEndpoint());
      }
  
      public List<Token> getTokens(InetAddressAndPort endpoint)
      {
          return ImmutableList.copyOf(endpointTokens.get(endpoint));
      }
  
      private static InetAddressAndPort localEndpoint()
      {
          return FBUtilities.getBroadcastAddressAndPort();
      }
  
      private static InetAddressAndPort endpointByName(String name)
      {
          try
          {
              return InetAddressAndPort.getByName(name);
          }
          catch (UnknownHostException e)
          {
              throw new RuntimeException(e);
          }
      }
  }
  