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.paxos.cleanup;
  
  import java.util.Collection;
  import java.util.HashSet;
  import java.util.Set;
  
  import org.apache.cassandra.exceptions.RequestFailure;
  import org.apache.cassandra.locator.InetAddressAndPort;
  import org.apache.cassandra.net.IVerbHandler;
  import org.apache.cassandra.net.Message;
  import org.apache.cassandra.net.RequestCallbackWithFailure;
  import org.apache.cassandra.net.Verb;
  import org.apache.cassandra.repair.SharedContext;
  import org.apache.cassandra.utils.concurrent.AsyncFuture;
  
  public class PaxosFinishPrepareCleanup extends AsyncFuture<Void> implements RequestCallbackWithFailure<Void>
  {
      private final Set<InetAddressAndPort> waitingResponse;
  
      PaxosFinishPrepareCleanup(Collection<InetAddressAndPort> endpoints)
      {
          this.waitingResponse = new HashSet<>(endpoints);
      }
  
      public static PaxosFinishPrepareCleanup finish(SharedContext ctx, Collection<InetAddressAndPort> endpoints, boolean isUrgent, PaxosCleanupHistory result)
      {
          PaxosFinishPrepareCleanup callback = new PaxosFinishPrepareCleanup(endpoints);
          synchronized (callback)
          {
              Message<PaxosCleanupHistory> message = Message.out(Verb.PAXOS2_CLEANUP_FINISH_PREPARE_REQ, result, isUrgent);
              for (InetAddressAndPort endpoint : endpoints)
                  ctx.messaging().sendWithCallback(message, endpoint, callback);
          }
          return callback;
      }
  
      @Override
      public void onFailure(InetAddressAndPort from, RequestFailure reason)
      {
          tryFailure(new PaxosCleanupException(reason + " failure response from " + from));
      }
  
      public synchronized void onResponse(Message<Void> msg)
      {
          if (isDone())
              return;
  
          if (!waitingResponse.remove(msg.from()))
              throw new IllegalArgumentException("Received unexpected response from " + msg.from());
  
          if (waitingResponse.isEmpty())
              trySuccess(null);
      }
  
      public static IVerbHandler<PaxosCleanupHistory> createVerbHandler(SharedContext ctx)
      {
          return ctx.paxosRepairState()::addCleanupHistory;
      }
  
      public static final IVerbHandler<PaxosCleanupHistory> verbHandler = createVerbHandler(SharedContext.Global.instance);
  }
  