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.repair;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.List;
  import java.util.Objects;
  
  import com.google.common.collect.Lists;
  import com.google.common.util.concurrent.FutureCallback;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import org.apache.cassandra.concurrent.ExecutorPlus;
  import org.apache.cassandra.dht.Range;
  import org.apache.cassandra.dht.Token;
  import org.apache.cassandra.locator.InetAddressAndPort;
  import org.apache.cassandra.repair.messages.RepairOption;
  import org.apache.cassandra.utils.TimeUUID;
  import org.apache.cassandra.utils.concurrent.Future;
  import org.apache.cassandra.utils.concurrent.FutureCombiner;
  
  public abstract class AbstractRepairTask implements RepairTask
  {
      protected static final Logger logger = LoggerFactory.getLogger(AbstractRepairTask.class);
  
      protected final RepairCoordinator coordinator;
      protected final InetAddressAndPort broadcastAddressAndPort;
      protected final RepairOption options;
      protected final String keyspace;
  
      protected AbstractRepairTask(RepairCoordinator coordinator)
      {
          this.coordinator = Objects.requireNonNull(coordinator);
          this.broadcastAddressAndPort = coordinator.ctx.broadcastAddressAndPort();
          this.options = Objects.requireNonNull(coordinator.state.options);
          this.keyspace = Objects.requireNonNull(coordinator.state.keyspace);
      }
  
      private List<RepairSession> submitRepairSessions(TimeUUID parentSession,
                                                       boolean isIncremental,
                                                       ExecutorPlus executor,
                                                       Scheduler validationScheduler,
                                                       List<CommonRange> commonRanges,
                                                       boolean excludedDeadNodes,
                                                       String... cfnames)
      {
          List<RepairSession> futures = new ArrayList<>(options.getRanges().size());
  
          for (CommonRange commonRange : commonRanges)
          {
              logger.info("Starting RepairSession for {}", commonRange);
              RepairSession session = coordinator.ctx.repair().submitRepairSession(parentSession,
                                                                                   commonRange,
                                                                                   excludedDeadNodes,
                                                                                   keyspace,
                                                                                   options.getParallelism(),
                                                                                   isIncremental,
                                                                                   options.isPullRepair(),
                                                                                   options.getPreviewKind(),
                                                                                   options.optimiseStreams(),
                                                                                   options.repairData(),
                                                                                   options.repairPaxos(),
                                                                                   options.dontPurgeTombstones(),
                                                                                   options.repairAccord(),
                                                                                   executor,
                                                                                   validationScheduler,
                                                                                   cfnames);
              if (session == null)
                  continue;
              session.addCallback(new RepairSessionCallback(session));
              futures.add(session);
          }
          return futures;
      }
  
      protected Future<CoordinatedRepairResult> runRepair(TimeUUID parentSession,
                                                          boolean isIncremental,
                                                          ExecutorPlus executor,
                                                          Scheduler validationScheduler,
                                                          List<CommonRange> commonRanges,
                                                          boolean excludedDeadNodes,
                                                          String... cfnames)
      {
          List<RepairSession> allSessions = submitRepairSessions(parentSession, isIncremental, executor, validationScheduler, commonRanges, excludedDeadNodes, cfnames);
          List<Collection<Range<Token>>> ranges = Lists.transform(allSessions, RepairSession::ranges);
          Future<List<RepairSessionResult>> f = FutureCombiner.successfulOf(allSessions);
          return f.map(results -> {
              logger.debug("Repair result: {}", results);
              return CoordinatedRepairResult.create(ranges, results);
          });
      }
  
      private class RepairSessionCallback implements FutureCallback<RepairSessionResult>
      {
          private final RepairSession session;
  
          public RepairSessionCallback(RepairSession session)
          {
              this.session = session;
          }
  
          @Override
          public void onSuccess(RepairSessionResult result)
          {
              String message = String.format("Repair session %s for range %s finished", session.getId(),
                                             session.ranges().toString());
              coordinator.notifyProgress(message);
          }
  
          @Override
          public void onFailure(Throwable t)
          {
              String message = String.format("Repair session %s for range %s failed with error %s",
                                             session.getId(), session.ranges().toString(), t.getMessage());
              coordinator.notifyError(new RuntimeException(message, t));
          }
      }
  }
  