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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.service.reads.repair;
  
  import java.util.Collections;
  
  import com.google.common.collect.Lists;
  
  import org.apache.cassandra.db.Mutation;
  import org.apache.cassandra.diag.DiagnosticEventService;
  import org.apache.cassandra.locator.InetAddressAndPort;
  import org.apache.cassandra.locator.ReplicaPlan;
  import org.apache.cassandra.service.reads.DigestResolver;
  import org.apache.cassandra.service.reads.repair.PartitionRepairEvent.PartitionRepairEventType;
  import org.apache.cassandra.service.reads.repair.ReadRepairEvent.ReadRepairEventType;
  
  final class ReadRepairDiagnostics
  {
      private static final DiagnosticEventService service = DiagnosticEventService.instance();
  
      private ReadRepairDiagnostics()
      {
      }
  
      static void startRepair(AbstractReadRepair readRepair, ReplicaPlan.ForRead<?, ?> fullPlan, DigestResolver digestResolver)
      {
          if (service.isEnabled(ReadRepairEvent.class, ReadRepairEventType.START_REPAIR))
              service.publish(new ReadRepairEvent(ReadRepairEventType.START_REPAIR,
                                                  readRepair,
                                                  fullPlan.contacts().endpoints(),
                                                  fullPlan.readCandidates().endpoints(), digestResolver));
      }
  
      static void speculatedRead(AbstractReadRepair readRepair, InetAddressAndPort endpoint,
                                 ReplicaPlan.ForRead<?, ?> fullPlan)
      {
          if (service.isEnabled(ReadRepairEvent.class, ReadRepairEventType.SPECULATED_READ))
              service.publish(new ReadRepairEvent(ReadRepairEventType.SPECULATED_READ,
                                                  readRepair, Collections.singletonList(endpoint),
                                                  Lists.newArrayList(fullPlan.readCandidates().endpoints()), null));
      }
  
      static void sendInitialRepair(BlockingPartitionRepair partitionRepair, InetAddressAndPort destination, Mutation mutation)
      {
          if (service.isEnabled(PartitionRepairEvent.class, PartitionRepairEventType.SEND_INITIAL_REPAIRS))
              service.publish(new PartitionRepairEvent(PartitionRepairEventType.SEND_INITIAL_REPAIRS, partitionRepair,
                                                       destination, mutation));
      }
  
      static void speculatedWrite(BlockingPartitionRepair partitionRepair, InetAddressAndPort destination, Mutation mutation)
      {
          if (service.isEnabled(PartitionRepairEvent.class, PartitionRepairEventType.SPECULATED_WRITE))
              service.publish(new PartitionRepairEvent(PartitionRepairEventType.SPECULATED_WRITE, partitionRepair,
                                                       destination, mutation));
      }
  
      static void speculatedWriteOversized(BlockingPartitionRepair partitionRepair, InetAddressAndPort destination)
      {
          if (service.isEnabled(PartitionRepairEvent.class, PartitionRepairEventType.UPDATE_OVERSIZED))
              service.publish(new PartitionRepairEvent(PartitionRepairEventType.UPDATE_OVERSIZED, partitionRepair,
                                                       destination, null));
      }
  }
  