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.metrics;
  
  import java.util.Collection;
  
  import com.codahale.metrics.Counter;
  
  import org.apache.cassandra.config.DatabaseDescriptor;
  import org.apache.cassandra.cql3.restrictions.StatementRestrictions;
  import org.apache.cassandra.cql3.selection.Selection;
  import org.apache.cassandra.db.IMutation;
  import org.apache.cassandra.db.partitions.PartitionUpdate;
  import org.apache.cassandra.schema.ColumnMetadata;
  import org.apache.cassandra.transport.messages.ResultMessage;
  
  import static org.apache.cassandra.metrics.CassandraMetricsRegistry.Metrics;
  
  public class ClientRequestSizeMetrics
  {
      public static final String TYPE = "ClientRequestSize";
  
      public static final Counter totalColumnsRead = Metrics.counter(DefaultNameFactory.createMetricName(TYPE, "ColumnsRead", null));
      public static final Counter totalRowsRead = Metrics.counter(DefaultNameFactory.createMetricName(TYPE, "RowsRead", null));
      public static final Counter totalColumnsWritten = Metrics.counter(DefaultNameFactory.createMetricName(TYPE, "ColumnsWritten", null));
      public static final Counter totalRowsWritten = Metrics.counter(DefaultNameFactory.createMetricName(TYPE, "RowsWritten", null));
  
      public static void recordReadResponseMetrics(ResultMessage.Rows rows, StatementRestrictions restrictions, Selection selection)
      {
          if (!DatabaseDescriptor.getClientRequestSizeMetricsEnabled())
              return;
  
          int rowCount = rows.result.size();
          ClientRequestSizeMetrics.totalRowsRead.inc(rowCount);
          
          int nonRestrictedColumns = selection.getColumns().size();
          
          for (ColumnMetadata column : selection.getColumns())
              if (restrictions.isEqualityRestricted(column))
                  nonRestrictedColumns--;
              
          long columnCount = (long) rowCount * nonRestrictedColumns;
          ClientRequestSizeMetrics.totalColumnsRead.inc(columnCount);
      }
  
      public static void recordRowAndColumnCountMetrics(Collection<? extends IMutation> mutations)
      {
          if (!DatabaseDescriptor.getClientRequestSizeMetricsEnabled())
              return;
  
          int rowCount = 0;
          int columnCount = 0;
  
          for (IMutation mutation : mutations)
          {
              for (PartitionUpdate update : mutation.getPartitionUpdates())
              {
                  columnCount += update.affectedColumnCount();
                  rowCount += update.affectedRowCount();
              }
          }
  
          ClientRequestSizeMetrics.totalColumnsWritten.inc(columnCount);
          ClientRequestSizeMetrics.totalRowsWritten.inc(rowCount);
      }
  
      public static void recordRowAndColumnCountMetrics(PartitionUpdate update)
      {
          if (!DatabaseDescriptor.getClientRequestSizeMetricsEnabled())
              return;
  
          ClientRequestSizeMetrics.totalColumnsWritten.inc(update.affectedColumnCount());
          ClientRequestSizeMetrics.totalRowsWritten.inc(update.affectedRowCount());
      }
  }
  