AnalyticsRequestCallback.java

/*
 * 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.hadoop.fs.s3a.impl.streams;

import software.amazon.s3.analyticsaccelerator.util.RequestCallback;
import org.apache.hadoop.fs.s3a.statistics.S3AInputStreamStatistics;

/**
 * Implementation of AAL's RequestCallback interface that tracks analytics operations.
 */
public class AnalyticsRequestCallback implements RequestCallback {
  private final S3AInputStreamStatistics statistics;

    /**
     * Create a new callback instance.
     * @param statistics the statistics to update
     */
  public AnalyticsRequestCallback(S3AInputStreamStatistics statistics) {
    this.statistics = statistics;
  }

  @Override
    public void onGetRequest() {
    statistics.getRequestInitiated();
  }

  @Override
    public void onHeadRequest() {
    statistics.headRequestInitiated();
  }

  @Override
  public void onBlockPrefetch(long start, long end) {
    statistics.bytesPrefetched(end - start + 1);
  }

  @Override
  public void footerParsingFailed() {
    statistics.footerParsingFailed();
  }

  @Override
  public void onReadVectored(int numIncomingRanges, int numCombinedRanges) {
    statistics.readVectoredOperationStarted(numIncomingRanges, numCombinedRanges);
  }

  @Override
  public void onCacheHit() {
    statistics.streamReadCacheHit();
  }

}