hudi-client/hudi-spark-client/src/main/java/org/apache/hudi/table/action/compact/SparkScheduleCompactionActionExecutor.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
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package org.apache.hudi.table.action.compact;

import org.apache.hudi.avro.model.HoodieCompactionPlan;
import org.apache.hudi.client.WriteStatus;
import org.apache.hudi.client.common.HoodieEngineContext;
import org.apache.hudi.common.model.HoodieKey;
import org.apache.hudi.common.model.HoodieRecord;
import org.apache.hudi.common.model.HoodieRecordPayload;
import org.apache.hudi.common.table.timeline.HoodieInstant;
import org.apache.hudi.common.table.view.SyncableFileSystemView;
import org.apache.hudi.common.util.Option;
import org.apache.hudi.config.HoodieWriteConfig;
import org.apache.hudi.exception.HoodieCompactionException;
import org.apache.hudi.table.HoodieTable;

import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;
import org.apache.spark.api.java.JavaRDD;

import java.io.IOException;
import java.util.Map;
import java.util.stream.Collectors;

@SuppressWarnings("checkstyle:LineLength")
public class SparkScheduleCompactionActionExecutor<T extends HoodieRecordPayload> extends
    BaseScheduleCompactionActionExecutor<T, JavaRDD<HoodieRecord<T>>, JavaRDD<HoodieKey>, JavaRDD<WriteStatus>> {

  private static final Logger LOG = LogManager.getLogger(SparkScheduleCompactionActionExecutor.class);

  public SparkScheduleCompactionActionExecutor(HoodieEngineContext context,
                                               HoodieWriteConfig config,
                                               HoodieTable<T, JavaRDD<HoodieRecord<T>>, JavaRDD<HoodieKey>, JavaRDD<WriteStatus>> table,
                                               String instantTime,
                                               Option<Map<String, String>> extraMetadata) {
    super(context, config, table, instantTime, extraMetadata);
  }

  @Override
  protected HoodieCompactionPlan scheduleCompaction() {
    LOG.info("Checking if compaction needs to be run on " + config.getBasePath());
    Option<HoodieInstant> lastCompaction = table.getActiveTimeline().getCommitTimeline()
        .filterCompletedInstants().lastInstant();
    String lastCompactionTs = "0";
    if (lastCompaction.isPresent()) {
      lastCompactionTs = lastCompaction.get().getTimestamp();
    }

    int deltaCommitsSinceLastCompaction = table.getActiveTimeline().getDeltaCommitTimeline()
        .findInstantsAfter(lastCompactionTs, Integer.MAX_VALUE).countInstants();
    if (config.getInlineCompactDeltaCommitMax() > deltaCommitsSinceLastCompaction) {
      LOG.info("Not scheduling compaction as only " + deltaCommitsSinceLastCompaction
          + " delta commits was found since last compaction " + lastCompactionTs + ". Waiting for "
          + config.getInlineCompactDeltaCommitMax());
      return new HoodieCompactionPlan();
    }

    LOG.info("Generating compaction plan for merge on read table " + config.getBasePath());
    HoodieSparkMergeOnReadTableCompactor compactor = new HoodieSparkMergeOnReadTableCompactor();
    try {
      return compactor.generateCompactionPlan(context, table, config, instantTime,
          ((SyncableFileSystemView) table.getSliceView()).getPendingCompactionOperations()
              .map(instantTimeOpPair -> instantTimeOpPair.getValue().getFileGroupId())
              .collect(Collectors.toSet()));

    } catch (IOException e) {
      throw new HoodieCompactionException("Could not schedule compaction " + config.getBasePath(), e);
    }
  }

}