001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.coprocessor.example.row.stats.ringbuffer;
019
020import static org.apache.hadoop.hbase.coprocessor.example.row.stats.utils.RowStatisticsTableUtil.buildPutForRegion;
021
022import com.lmax.disruptor.EventHandler;
023import java.io.IOException;
024import org.apache.hadoop.hbase.client.BufferedMutator;
025import org.apache.hadoop.hbase.client.Put;
026import org.apache.hadoop.hbase.coprocessor.example.row.stats.RowStatistics;
027import org.apache.hadoop.hbase.metrics.Counter;
028import org.apache.yetus.audience.InterfaceAudience;
029import org.slf4j.Logger;
030import org.slf4j.LoggerFactory;
031
032@InterfaceAudience.Private
033public class RowStatisticsEventHandler implements EventHandler<RowStatisticsRingBufferEnvelope> {
034
035  private static final Logger LOG = LoggerFactory.getLogger(RowStatisticsEventHandler.class);
036  private final BufferedMutator bufferedMutator;
037  private final Counter rowStatisticsPutFailures;
038
039  public RowStatisticsEventHandler(BufferedMutator bufferedMutator,
040    Counter rowStatisticsPutFailures) {
041    this.bufferedMutator = bufferedMutator;
042    this.rowStatisticsPutFailures = rowStatisticsPutFailures;
043  }
044
045  @Override
046  public void onEvent(RowStatisticsRingBufferEnvelope event, long sequence, boolean endOfBatch)
047    throws Exception {
048    final RowStatisticsRingBufferPayload payload = event.getPayload();
049    if (payload != null) {
050      final RowStatistics rowStatistics = payload.getRowStatistics();
051      final byte[] fullRegionName = payload.getFullRegionName();
052      Put put = buildPutForRegion(fullRegionName, rowStatistics, rowStatistics.isMajor());
053      try {
054        bufferedMutator.mutate(put);
055      } catch (IOException e) {
056        rowStatisticsPutFailures.increment();
057        LOG.error("Mutate operation failed. Cannot persist row statistics for region {}",
058          rowStatistics.getRegion(), e);
059      }
060    }
061  }
062}