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.carbondata.processing.loading.steps;
  
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.Iterator;
  import java.util.List;
  import java.util.Map;
  import java.util.concurrent.Callable;
  import java.util.concurrent.CopyOnWriteArrayList;
  import java.util.concurrent.ExecutionException;
  import java.util.concurrent.ExecutorService;
  import java.util.concurrent.Executors;
  import java.util.concurrent.Future;
  import java.util.concurrent.TimeUnit;
  
  import org.apache.carbondata.common.logging.LogServiceFactory;
  import org.apache.carbondata.core.datastore.exception.CarbonDataWriterException;
  import org.apache.carbondata.core.datastore.row.CarbonRow;
  import org.apache.carbondata.core.localdictionary.generator.LocalDictionaryGenerator;
  import org.apache.carbondata.core.metadata.CarbonTableIdentifier;
  import org.apache.carbondata.core.util.CarbonThreadFactory;
  import org.apache.carbondata.core.util.CarbonTimeStatisticsFactory;
  import org.apache.carbondata.core.util.CarbonUtil;
  import org.apache.carbondata.core.util.path.CarbonTablePath;
  import org.apache.carbondata.processing.index.IndexWriterListener;
  import org.apache.carbondata.processing.loading.AbstractDataLoadProcessorStep;
  import org.apache.carbondata.processing.loading.CarbonDataLoadConfiguration;
  import org.apache.carbondata.processing.loading.exception.CarbonDataLoadingException;
  import org.apache.carbondata.processing.loading.row.CarbonRowBatch;
  import org.apache.carbondata.processing.store.CarbonFactDataHandlerModel;
  import org.apache.carbondata.processing.store.CarbonFactHandler;
  import org.apache.carbondata.processing.store.CarbonFactHandlerFactory;
  import org.apache.carbondata.processing.util.CarbonDataProcessorUtil;
  
  import org.apache.log4j.Logger;
  
  /**
   * It reads data from sorted files which are generated in previous sort step.
   * And it writes data to carbondata file. It also generates mdk key while writing to carbondata file
   */
  public class DataWriterProcessorStepImpl extends AbstractDataLoadProcessorStep {
  
    private static final Logger LOGGER =
        LogServiceFactory.getLogService(DataWriterProcessorStepImpl.class.getName());
  
    private long readCounter;
  
    private IndexWriterListener listener;
  
    private final Map<String, LocalDictionaryGenerator> localDictionaryGeneratorMap;
  
    private ExecutorService rangeExecutorService;
  
    private List<CarbonFactHandler> carbonFactHandlers;
  
    public DataWriterProcessorStepImpl(CarbonDataLoadConfiguration configuration,
        AbstractDataLoadProcessorStep child) {
      super(configuration, child);
      this.localDictionaryGeneratorMap =
          CarbonUtil.getLocalDictionaryModel(configuration.getTableSpec().getCarbonTable());
    }
  
    public DataWriterProcessorStepImpl(CarbonDataLoadConfiguration configuration) {
      super(configuration, null);
      this.localDictionaryGeneratorMap =
          CarbonUtil.getLocalDictionaryModel(configuration.getTableSpec().getCarbonTable());
    }
  
    @Override
    public void initialize() throws IOException {
      super.initialize();
      child.initialize();
      this.carbonFactHandlers = new CopyOnWriteArrayList<>();
    }
  
    private String[] getStoreLocation() {
      String[] storeLocation = CarbonDataProcessorUtil
          .getLocalDataFolderLocation(configuration.getTableSpec().getCarbonTable(),
              String.valueOf(configuration.getTaskNo()), configuration.getSegmentId(), false, false);
      CarbonDataProcessorUtil.createLocations(storeLocation);
      return storeLocation;
    }
  
    public CarbonFactDataHandlerModel getDataHandlerModel() {
      String[] storeLocation = getStoreLocation();
      listener = getIndexWriterListener(0);
      CarbonFactDataHandlerModel carbonFactDataHandlerModel = CarbonFactDataHandlerModel
          .createCarbonFactDataHandlerModel(configuration, storeLocation, 0, 0, listener);
      carbonFactDataHandlerModel.setColumnLocalDictGenMap(localDictionaryGeneratorMap);
      return carbonFactDataHandlerModel;
    }
  
    @Override
    public Iterator<CarbonRowBatch>[] execute() throws CarbonDataLoadingException {
      Iterator<CarbonRowBatch>[] iterators = child.execute();
      CarbonTableIdentifier tableIdentifier =
          configuration.getTableIdentifier().getCarbonTableIdentifier();
      String tableName = tableIdentifier.getTableName();
      try {
        CarbonTimeStatisticsFactory.getLoadStatisticsInstance()
            .recordDictionaryValue2MdkAdd2FileTime(CarbonTablePath.DEPRECATED_PARTITION_ID,
                System.currentTimeMillis());
        rangeExecutorService = Executors.newFixedThreadPool(iterators.length,
            new CarbonThreadFactory("WriterForwardPool: " + tableName, true));
        List<Future<Void>> rangeExecutorServiceSubmitList = new ArrayList<>(iterators.length);
        int i = 0;
        // do this concurrently
        for (Iterator<CarbonRowBatch> iterator : iterators) {
          rangeExecutorServiceSubmitList.add(
              rangeExecutorService.submit(new WriterForwarder(iterator, i)));
          i++;
        }
        try {
          rangeExecutorService.shutdown();
          rangeExecutorService.awaitTermination(2, TimeUnit.DAYS);
          for (int j = 0; j < rangeExecutorServiceSubmitList.size(); j++) {
            rangeExecutorServiceSubmitList.get(j).get();
          }
        } catch (InterruptedException e) {
          throw new CarbonDataWriterException(e);
        } catch (ExecutionException e) {
          throw new CarbonDataWriterException(e.getCause());
        }
      } catch (CarbonDataWriterException e) {
        LOGGER.error(e);
        throw new CarbonDataLoadingException("Error while initializing writer: " + e.getMessage(), e);
      } catch (Exception e) {
        throw new CarbonDataLoadingException("There is an unexpected error: " + e.getMessage(), e);
      }
      return null;
    }
  
    @Override
    protected String getStepName() {
      return "Data Writer";
    }
  
    /**
     * Used to forward rows to different ranges based on range id.
     */
    private final class WriterForwarder implements Callable<Void> {
      private Iterator<CarbonRowBatch> insideRangeIterator;
      private int rangeId;
  
      WriterForwarder(Iterator<CarbonRowBatch> insideRangeIterator, int rangeId) {
        this.insideRangeIterator = insideRangeIterator;
        this.rangeId = rangeId;
      }
  
      @Override
      public Void call() {
        processRange(insideRangeIterator, rangeId);
        return null;
      }
    }
  
    private void processRange(Iterator<CarbonRowBatch> insideRangeIterator, int rangeId) {
      String[] storeLocation = getStoreLocation();
  
      listener = getIndexWriterListener(rangeId);
      CarbonFactDataHandlerModel model = CarbonFactDataHandlerModel
          .createCarbonFactDataHandlerModel(configuration, storeLocation, rangeId, 0, listener);
      model.setColumnLocalDictGenMap(localDictionaryGeneratorMap);
      CarbonFactHandler dataHandler = null;
      boolean rowsNotExist = true;
      while (insideRangeIterator.hasNext()) {
        if (rowsNotExist) {
          rowsNotExist = false;
          dataHandler = CarbonFactHandlerFactory.createCarbonFactHandler(model);
          carbonFactHandlers.add(dataHandler);
          dataHandler.initialise();
        }
        processBatch(insideRangeIterator.next(), dataHandler);
      }
      if (!rowsNotExist) {
        finish(dataHandler);
      }
      carbonFactHandlers.remove(dataHandler);
    }
  
    public void finish(CarbonFactHandler dataHandler) {
      CarbonTableIdentifier tableIdentifier =
          configuration.getTableIdentifier().getCarbonTableIdentifier();
      String tableName = tableIdentifier.getTableName();
      dataHandler.finish();
      if (LOGGER.isDebugEnabled()) {
        LOGGER.debug("Record Processed For table: " + tableName);
        LOGGER.debug("Finished Carbon DataWriterProcessorStepImpl: Read: " + readCounter +
            ": Write: " + rowCounter.get());
      }
      CarbonTimeStatisticsFactory.getLoadStatisticsInstance().recordTotalRecords(rowCounter.get());
      processingComplete(dataHandler);
      CarbonTimeStatisticsFactory.getLoadStatisticsInstance()
          .recordDictionaryValue2MdkAdd2FileTime(CarbonTablePath.DEPRECATED_PARTITION_ID,
              System.currentTimeMillis());
      CarbonTimeStatisticsFactory.getLoadStatisticsInstance()
          .recordMdkGenerateTotalTime(CarbonTablePath.DEPRECATED_PARTITION_ID,
              System.currentTimeMillis());
    }
  
    private void processingComplete(CarbonFactHandler dataHandler) {
      if (null != dataHandler) {
        dataHandler.closeHandler();
      }
    }
  
    private void processBatch(CarbonRowBatch batch, CarbonFactHandler dataHandler) {
      while (batch.hasNext()) {
        CarbonRow row = batch.next();
        dataHandler.addDataToStore(row);
        readCounter++;
      }
      rowCounter.getAndAdd(batch.getSize());
    }
  
    public void processRow(CarbonRow row, CarbonFactHandler dataHandler) {
      readCounter++;
      dataHandler.addDataToStore(row);
      rowCounter.getAndAdd(1);
    }
  
    @Override
    public void close() {
      if (!closed) {
        super.close();
        if (listener != null) {
          try {
            LOGGER.debug("closing all the Index writers registered to index writer listener");
            listener.finish();
          } catch (IOException e) {
            LOGGER.error("error while closing the index writers", e);
            // ignoring the exception
          }
        }
        if (null != rangeExecutorService) {
          rangeExecutorService.shutdownNow();
        }
        if (null != this.carbonFactHandlers && !this.carbonFactHandlers.isEmpty()) {
          for (CarbonFactHandler carbonFactHandler : this.carbonFactHandlers) {
            carbonFactHandler.finish();
            carbonFactHandler.closeHandler();
          }
        }
        if (configuration.getMetrics() != null) {
          configuration.getMetrics().addOutputRows(rowCounter.get());
        }
      }
    }
  }
  