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 com.datastax.oss.driver.internal.core.channel;
  
  import com.datastax.oss.driver.api.core.metrics.DefaultNodeMetric;
  import com.datastax.oss.driver.api.core.metrics.DefaultSessionMetric;
  import com.datastax.oss.driver.internal.core.metrics.NodeMetricUpdater;
  import com.datastax.oss.driver.internal.core.metrics.SessionMetricUpdater;
  import io.netty.buffer.ByteBuf;
  import io.netty.channel.ChannelHandlerContext;
  import io.netty.channel.ChannelInboundHandlerAdapter;
  
  public class InboundTrafficMeter extends ChannelInboundHandlerAdapter {
  
    private final NodeMetricUpdater nodeMetricUpdater;
    private final SessionMetricUpdater sessionMetricUpdater;
  
    InboundTrafficMeter(
        NodeMetricUpdater nodeMetricUpdater, SessionMetricUpdater sessionMetricUpdater) {
      this.nodeMetricUpdater = nodeMetricUpdater;
      this.sessionMetricUpdater = sessionMetricUpdater;
    }
  
    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
      if (msg instanceof ByteBuf) {
        int bytes = ((ByteBuf) msg).readableBytes();
        nodeMetricUpdater.markMeter(DefaultNodeMetric.BYTES_RECEIVED, null, bytes);
        sessionMetricUpdater.markMeter(DefaultSessionMetric.BYTES_RECEIVED, null, bytes);
      }
      super.channelRead(ctx, msg);
    }
  }
  