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.EnumSet;
  import java.util.Map;
  import java.util.Set;
  
  import org.apache.cassandra.exceptions.RequestFailure;
  import org.apache.cassandra.locator.InetAddressAndPort;
  import org.apache.cassandra.net.ParamType;
  
  public class WarningContext
  {
      private static final EnumSet<ParamType> SUPPORTED = EnumSet.of(ParamType.TOMBSTONE_WARNING, ParamType.TOMBSTONE_FAIL,
                                                               ParamType.LOCAL_READ_SIZE_WARN, ParamType.LOCAL_READ_SIZE_FAIL,
                                                               ParamType.ROW_INDEX_READ_SIZE_WARN, ParamType.ROW_INDEX_READ_SIZE_FAIL,
                                                               ParamType.TOO_MANY_REFERENCED_INDEXES_WARN, ParamType.TOO_MANY_REFERENCED_INDEXES_FAIL);
  
      final WarnAbortCounter tombstones = new WarnAbortCounter();
      final WarnAbortCounter localReadSize = new WarnAbortCounter();
      final WarnAbortCounter rowIndexReadSize = new WarnAbortCounter();
      final WarnAbortCounter indexReadSSTablesCount = new WarnAbortCounter();
  
      public static boolean isSupported(Set<ParamType> keys)
      {
          return !Collections.disjoint(keys, SUPPORTED);
      }
  
      public RequestFailure updateCounters(Map<ParamType, Object> params, InetAddressAndPort from)
      {
          for (Map.Entry<ParamType, Object> entry : params.entrySet())
          {
              WarnAbortCounter counter = null;
              RequestFailure reason = null;
              switch (entry.getKey())
              {
                  case ROW_INDEX_READ_SIZE_FAIL:
                      reason = RequestFailure.READ_SIZE;
                  case ROW_INDEX_READ_SIZE_WARN:
                      counter = rowIndexReadSize;
                      break;
                  case LOCAL_READ_SIZE_FAIL:
                      reason = RequestFailure.READ_SIZE;
                  case LOCAL_READ_SIZE_WARN:
                      counter = localReadSize;
                      break;
                  case TOMBSTONE_FAIL:
                      reason = RequestFailure.READ_TOO_MANY_TOMBSTONES;
                  case TOMBSTONE_WARNING:
                      counter = tombstones;
                      break;
                  case TOO_MANY_REFERENCED_INDEXES_FAIL:
                      reason = RequestFailure.READ_TOO_MANY_INDEXES;
                  case TOO_MANY_REFERENCED_INDEXES_WARN:
                      counter = indexReadSSTablesCount;
                      break;
              }
              if (reason != null)
              {
                  counter.addAbort(from, ((Number) entry.getValue()).longValue());
                  return reason;
              }
              if (counter != null)
                  counter.addWarning(from, ((Number) entry.getValue()).longValue());
          }
          return null;
      }
  
      public WarningsSnapshot snapshot()
      {
          return WarningsSnapshot.create(tombstones.snapshot(), localReadSize.snapshot(), rowIndexReadSize.snapshot(), indexReadSSTablesCount.snapshot());
      }
  }
  