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.reads.thresholds;
  
  import java.util.Collections;
  import java.util.Set;
  import java.util.concurrent.ConcurrentHashMap;
  import java.util.concurrent.atomic.AtomicLong;
  
  import org.apache.cassandra.locator.InetAddressAndPort;
  
  public class WarnAbortCounter
  {
      final Set<InetAddressAndPort> warnings = Collections.newSetFromMap(new ConcurrentHashMap<>());
      // the highest number reported by a node's warning
      final AtomicLong maxWarningValue = new AtomicLong();
  
      final Set<InetAddressAndPort> aborts = Collections.newSetFromMap(new ConcurrentHashMap<>());
      // the highest number reported by a node's rejection.
      final AtomicLong maxAbortsValue = new AtomicLong();
  
      void addWarning(InetAddressAndPort from, long value)
      {
          maxWarningValue.accumulateAndGet(value, Math::max);
          // call add last so concurrent reads see empty even if values > 0; if done in different order then
          // size=1 could have values == 0
          warnings.add(from);
      }
  
      void addAbort(InetAddressAndPort from, long value)
      {
          maxAbortsValue.accumulateAndGet(value, Math::max);
          // call add last so concurrent reads see empty even if values > 0; if done in different order then
          // size=1 could have values == 0
          aborts.add(from);
      }
  
      public WarningsSnapshot.Warnings snapshot()
      {
          return WarningsSnapshot.Warnings.create(WarningsSnapshot.Counter.create(warnings, maxWarningValue), WarningsSnapshot.Counter.create(aborts, maxAbortsValue));
      }
  }
  