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.net;
  
  import java.util.concurrent.atomic.AtomicLongFieldUpdater;
  
  /**
   * Aggregates counters for (from, connection type) for the duration of host uptime.
   *
   * If contention/false sharing ever become a problem, consider introducing padding.
   */
  class InboundCounters
  {
      private volatile long errorCount;
      private volatile long errorBytes;
  
      private static final AtomicLongFieldUpdater<InboundCounters> errorCountUpdater =
          AtomicLongFieldUpdater.newUpdater(InboundCounters.class, "errorCount");
      private static final AtomicLongFieldUpdater<InboundCounters> errorBytesUpdater =
          AtomicLongFieldUpdater.newUpdater(InboundCounters.class, "errorBytes");
  
      void addError(int bytes)
      {
          errorCountUpdater.incrementAndGet(this);
          errorBytesUpdater.addAndGet(this, bytes);
      }
  
      long errorCount()
      {
          return errorCount;
      }
  
      long errorBytes()
      {
          return errorBytes;
      }
  
      private volatile long expiredCount;
      private volatile long expiredBytes;
  
      private static final AtomicLongFieldUpdater<InboundCounters> expiredCountUpdater =
          AtomicLongFieldUpdater.newUpdater(InboundCounters.class, "expiredCount");
      private static final AtomicLongFieldUpdater<InboundCounters> expiredBytesUpdater =
          AtomicLongFieldUpdater.newUpdater(InboundCounters.class, "expiredBytes");
  
      void addExpired(int bytes)
      {
          expiredCountUpdater.incrementAndGet(this);
          expiredBytesUpdater.addAndGet(this, bytes);
      }
  
      long expiredCount()
      {
          return expiredCount;
      }
  
      long expiredBytes()
      {
          return expiredBytes;
      }
  
      private volatile long processedCount;
      private volatile long processedBytes;
  
      private static final AtomicLongFieldUpdater<InboundCounters> processedCountUpdater =
          AtomicLongFieldUpdater.newUpdater(InboundCounters.class, "processedCount");
      private static final AtomicLongFieldUpdater<InboundCounters> processedBytesUpdater =
          AtomicLongFieldUpdater.newUpdater(InboundCounters.class, "processedBytes");
  
      void addProcessed(int bytes)
      {
          processedCountUpdater.incrementAndGet(this);
          processedBytesUpdater.addAndGet(this, bytes);
      }
  
      long processedCount()
      {
          return processedCount;
      }
  
      long processedBytes()
      {
          return processedBytes;
      }
  
      private volatile long scheduledCount;
      private volatile long scheduledBytes;
  
      private static final AtomicLongFieldUpdater<InboundCounters> scheduledCountUpdater =
          AtomicLongFieldUpdater.newUpdater(InboundCounters.class, "scheduledCount");
      private static final AtomicLongFieldUpdater<InboundCounters> scheduledBytesUpdater =
          AtomicLongFieldUpdater.newUpdater(InboundCounters.class, "scheduledBytes");
  
      void addPending(int bytes)
      {
          scheduledCountUpdater.incrementAndGet(this);
          scheduledBytesUpdater.addAndGet(this, bytes);
      }
  
      void removePending(int bytes)
      {
          scheduledCountUpdater.decrementAndGet(this);
          scheduledBytesUpdater.addAndGet(this, -bytes);
      }
  
      long scheduledCount()
      {
          return scheduledCount;
      }
  
      long scheduledBytes()
      {
          return scheduledBytes;
      }
  }
  