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   * Licensed to the Apache Software Foundation (ASF) under one
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   * 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,
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   * See the License for the specific language governing permissions and
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  package org.apache.cassandra.service.reads.repair;
  
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.Set;
  
  import org.junit.Assert;
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import org.apache.cassandra.db.ReadCommand;
  import org.apache.cassandra.db.partitions.UnfilteredPartitionIterators;
  import org.apache.cassandra.locator.Endpoints;
  import org.apache.cassandra.locator.InetAddressAndPort;
  import org.apache.cassandra.locator.Replica;
  import org.apache.cassandra.locator.ReplicaPlan;
  import org.apache.cassandra.service.reads.ReadCallback;
  import org.apache.cassandra.transport.Dispatcher;
  import org.apache.cassandra.service.reads.ReadCoordinator;
  import org.apache.cassandra.service.reads.repair.ReadRepair.ReadRepairSource;
  
  public class ReadOnlyReadRepairTest extends AbstractReadRepairTest
  {
      private static class InstrumentedReadOnlyReadRepair<E extends Endpoints<E>, P extends ReplicaPlan.ForRead<E, P>>
              extends ReadOnlyReadRepair implements InstrumentedReadRepair
      {
          public InstrumentedReadOnlyReadRepair(ReadCommand command, ReplicaPlan.Shared<E, P> replicaPlan, Dispatcher.RequestTime requestTime)
          {
              super(ReadCoordinator.DEFAULT, command, replicaPlan, requestTime);
          }
  
          Set<InetAddressAndPort> readCommandRecipients = new HashSet<>();
          ReadCallback readCallback = null;
  
          @Override
          void sendReadCommand(Replica to, ReadCallback callback, boolean speculative, boolean trackRepairedStatus)
          {
              assert readCallback == null || readCallback == callback;
              readCommandRecipients.add(to.endpoint());
              readCallback = callback;
          }
  
          @Override
          public Set<InetAddressAndPort> getReadRecipients()
          {
              return readCommandRecipients;
          }
  
          @Override
          public ReadCallback getReadCallback()
          {
              return readCallback;
          }
      }
  
      @BeforeClass
      public static void setUpClass() throws Throwable
      {
          configureClass(ReadRepairStrategy.NONE);
      }
  
      @Override
      public InstrumentedReadRepair createInstrumentedReadRepair(ReadCommand command, ReplicaPlan.Shared<?, ?> replicaPlan, Dispatcher.RequestTime requestTime)
      {
          return new InstrumentedReadOnlyReadRepair(command, replicaPlan, requestTime);
      }
  
      @Test
      public void getMergeListener()
      {
          ReplicaPlan.SharedForRangeRead replicaPlan = ReplicaPlan.shared(replicaPlan(replicas, replicas));
          InstrumentedReadRepair repair = createInstrumentedReadRepair(replicaPlan);
          Assert.assertSame(UnfilteredPartitionIterators.MergeListener.NOOP, repair.getMergeListener(replicaPlan.get()));
      }
  
      @Test(expected = UnsupportedOperationException.class)
      public void repairPartitionFailure()
      {
          ReplicaPlan.SharedForRangeRead readPlan = ReplicaPlan.shared(replicaPlan(replicas, replicas));
          ReplicaPlan.ForWrite writePlan = repairPlan(replicas, replicas);
          InstrumentedReadRepair repair = createInstrumentedReadRepair(readPlan);
          repair.repairPartition(null, Collections.emptyMap(), writePlan, ReadRepairSource.OTHER);
      }
  }
  