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.accord;
  
  import org.apache.cassandra.metrics.LatencyMetrics;
  import static org.apache.cassandra.service.accord.RequestBookkeeping.ThrowsExceptionType.READ;
  
  public abstract class TimeOnlyRequestBookkeeping extends RequestBookkeeping
  {
      public static class LatencyRequestBookkeeping extends TimeOnlyRequestBookkeeping
      {
          final LatencyMetrics latency;
  
          public LatencyRequestBookkeeping(LatencyMetrics latency)
          {
              this.latency = latency;
          }
  
          public final void markElapsedNanos(long nanos)
          {
              if (latency != null)
                  latency.addNano(nanos);
          }
      }
  
      TimeOnlyRequestBookkeeping()
      {
          super(READ);
      }
  
      @Override
      final void markTimeout()
      {
      }
  
      @Override
      final void markPreempted()
      {
      }
  
      final void markFailure()
      {
      }
  
      @Override
      final void markRetryDifferentSystem()
      {
          throw new UnsupportedOperationException();
      }
  
      @Override
      void markTopologyMismatch()
      {
          throw new UnsupportedOperationException();
      }
  }
  