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From jackylk <...@git.apache.org>
Subject [GitHub] carbondata pull request #1099: [CARBONDATA-1232] Datamap implementation for ...
Date Wed, 05 Jul 2017 02:45:15 GMT
Github user jackylk commented on a diff in the pull request:

    https://github.com/apache/carbondata/pull/1099#discussion_r125546316
  
    --- Diff: hadoop/src/main/java/org/apache/carbondata/hadoop/CarbonInputFormatNew.java
---
    @@ -0,0 +1,566 @@
    +/*
    + * 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.hadoop;
    +
    +import java.io.IOException;
    +import java.lang.reflect.Constructor;
    +import java.util.ArrayList;
    +import java.util.Arrays;
    +import java.util.BitSet;
    +import java.util.HashMap;
    +import java.util.LinkedList;
    +import java.util.List;
    +import java.util.Map;
    +
    +import org.apache.carbondata.core.constants.CarbonCommonConstants;
    +import org.apache.carbondata.core.datastore.TableSegmentUniqueIdentifier;
    +import org.apache.carbondata.core.indexstore.AbstractTableDataMap;
    +import org.apache.carbondata.core.indexstore.Blocklet;
    +import org.apache.carbondata.core.indexstore.DataMapStoreManager;
    +import org.apache.carbondata.core.indexstore.DataMapType;
    +import org.apache.carbondata.core.keygenerator.KeyGenException;
    +import org.apache.carbondata.core.metadata.AbsoluteTableIdentifier;
    +import org.apache.carbondata.core.metadata.ColumnarFormatVersion;
    +import org.apache.carbondata.core.metadata.schema.PartitionInfo;
    +import org.apache.carbondata.core.metadata.schema.table.CarbonTable;
    +import org.apache.carbondata.core.mutate.CarbonUpdateUtil;
    +import org.apache.carbondata.core.mutate.SegmentUpdateDetails;
    +import org.apache.carbondata.core.mutate.UpdateVO;
    +import org.apache.carbondata.core.mutate.data.BlockMappingVO;
    +import org.apache.carbondata.core.scan.expression.Expression;
    +import org.apache.carbondata.core.scan.filter.FilterExpressionProcessor;
    +import org.apache.carbondata.core.scan.filter.resolver.FilterResolverIntf;
    +import org.apache.carbondata.core.scan.model.CarbonQueryPlan;
    +import org.apache.carbondata.core.scan.model.QueryModel;
    +import org.apache.carbondata.core.scan.partition.PartitionUtil;
    +import org.apache.carbondata.core.scan.partition.Partitioner;
    +import org.apache.carbondata.core.stats.QueryStatistic;
    +import org.apache.carbondata.core.stats.QueryStatisticsConstants;
    +import org.apache.carbondata.core.stats.QueryStatisticsRecorder;
    +import org.apache.carbondata.core.statusmanager.SegmentStatusManager;
    +import org.apache.carbondata.core.statusmanager.SegmentUpdateStatusManager;
    +import org.apache.carbondata.core.util.CarbonTimeStatisticsFactory;
    +import org.apache.carbondata.core.util.CarbonUtil;
    +import org.apache.carbondata.core.util.path.CarbonStorePath;
    +import org.apache.carbondata.core.util.path.CarbonTablePath;
    +import org.apache.carbondata.hadoop.readsupport.CarbonReadSupport;
    +import org.apache.carbondata.hadoop.readsupport.impl.DictionaryDecodeReadSupport;
    +import org.apache.carbondata.hadoop.util.CarbonInputFormatUtil;
    +import org.apache.carbondata.hadoop.util.ObjectSerializationUtil;
    +import org.apache.carbondata.hadoop.util.SchemaReader;
    +
    +import org.apache.commons.logging.Log;
    +import org.apache.commons.logging.LogFactory;
    +import org.apache.hadoop.conf.Configuration;
    +import org.apache.hadoop.fs.FileSystem;
    +import org.apache.hadoop.fs.InvalidPathException;
    +import org.apache.hadoop.fs.LocalFileSystem;
    +import org.apache.hadoop.fs.Path;
    +import org.apache.hadoop.mapreduce.InputSplit;
    +import org.apache.hadoop.mapreduce.JobContext;
    +import org.apache.hadoop.mapreduce.RecordReader;
    +import org.apache.hadoop.mapreduce.TaskAttemptContext;
    +import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
    +import org.apache.hadoop.mapreduce.lib.input.FileSplit;
    +import org.apache.hadoop.mapreduce.security.TokenCache;
    +import org.apache.hadoop.util.StringUtils;
    +
    +/**
    + * Carbon Input format class representing one carbon table
    + */
    +public class CarbonInputFormatNew<T> extends FileInputFormat<Void, T> {
    +
    +  // comma separated list of input segment numbers
    +  public static final String INPUT_SEGMENT_NUMBERS =
    +      "mapreduce.input.carboninputformat.segmentnumbers";
    +  // comma separated list of input files
    +  public static final String INPUT_FILES = "mapreduce.input.carboninputformat.files";
    +  private static final Log LOG = LogFactory.getLog(CarbonInputFormatNew.class);
    +  private static final String FILTER_PREDICATE =
    +      "mapreduce.input.carboninputformat.filter.predicate";
    +  private static final String COLUMN_PROJECTION = "mapreduce.input.carboninputformat.projection";
    +  private static final String CARBON_TABLE = "mapreduce.input.carboninputformat.table";
    +  private static final String CARBON_READ_SUPPORT = "mapreduce.input.carboninputformat.readsupport";
    +
    +  /**
    +   * It is optional, if user does not set then it reads from store
    +   *
    +   * @param configuration
    +   * @param carbonTable
    +   * @throws IOException
    +   */
    +  public static void setCarbonTable(Configuration configuration, CarbonTable carbonTable)
    +      throws IOException {
    +    if (null != carbonTable) {
    +      configuration.set(CARBON_TABLE, ObjectSerializationUtil.convertObjectToString(carbonTable));
    +    }
    +  }
    +
    +  public static CarbonTable getCarbonTable(Configuration configuration) throws IOException
{
    +    String carbonTableStr = configuration.get(CARBON_TABLE);
    +    if (carbonTableStr == null) {
    +      populateCarbonTable(configuration);
    +      // read it from schema file in the store
    +      carbonTableStr = configuration.get(CARBON_TABLE);
    +      return (CarbonTable) ObjectSerializationUtil.convertStringToObject(carbonTableStr);
    +    }
    +    return (CarbonTable) ObjectSerializationUtil.convertStringToObject(carbonTableStr);
    +  }
    +
    +  /**
    +   * this method will read the schema from the physical file and populate into CARBON_TABLE
    +   *
    +   * @param configuration
    +   * @throws IOException
    +   */
    +  private static void populateCarbonTable(Configuration configuration) throws IOException
{
    +    String dirs = configuration.get(INPUT_DIR, "");
    +    String[] inputPaths = StringUtils.split(dirs);
    +    if (inputPaths.length == 0) {
    +      throw new InvalidPathException("No input paths specified in job");
    +    }
    +    AbsoluteTableIdentifier absoluteTableIdentifier =
    +        AbsoluteTableIdentifier.fromTablePath(inputPaths[0]);
    +    // read the schema file to get the absoluteTableIdentifier having the correct table
id
    +    // persisted in the schema
    +    CarbonTable carbonTable = SchemaReader.readCarbonTableFromStore(absoluteTableIdentifier);
    +    setCarbonTable(configuration, carbonTable);
    +  }
    +
    +  public static void setTablePath(Configuration configuration, String tablePath)
    +      throws IOException {
    +    configuration.set(FileInputFormat.INPUT_DIR, tablePath);
    +  }
    +
    +  /**
    +   * It sets unresolved filter expression.
    +   *
    +   * @param configuration
    +   * @param filterExpression
    +   */
    +  public static void setFilterPredicates(Configuration configuration, Expression filterExpression)
{
    +    if (filterExpression == null) {
    +      return;
    +    }
    +    try {
    +      String filterString = ObjectSerializationUtil.convertObjectToString(filterExpression);
    +      configuration.set(FILTER_PREDICATE, filterString);
    +    } catch (Exception e) {
    +      throw new RuntimeException("Error while setting filter expression to Job", e);
    +    }
    +  }
    +
    +  public static void setColumnProjection(Configuration configuration, CarbonProjection
projection) {
    +    if (projection == null || projection.isEmpty()) {
    +      return;
    +    }
    +    String[] allColumns = projection.getAllColumns();
    +    StringBuilder builder = new StringBuilder();
    +    for (String column : allColumns) {
    +      builder.append(column).append(",");
    +    }
    +    String columnString = builder.toString();
    +    columnString = columnString.substring(0, columnString.length() - 1);
    +    configuration.set(COLUMN_PROJECTION, columnString);
    +  }
    +
    +  public static String getColumnProjection(Configuration configuration) {
    +    return configuration.get(COLUMN_PROJECTION);
    +  }
    +
    +  public static void setCarbonReadSupport(Configuration configuration,
    +      Class<? extends CarbonReadSupport> readSupportClass) {
    +    if (readSupportClass != null) {
    +      configuration.set(CARBON_READ_SUPPORT, readSupportClass.getName());
    +    }
    +  }
    +
    +  private static CarbonTablePath getTablePath(AbsoluteTableIdentifier absIdentifier)
{
    +    return CarbonStorePath.getCarbonTablePath(absIdentifier);
    +  }
    +
    +  /**
    +   * Set list of segments to access
    +   */
    +  public static void setSegmentsToAccess(Configuration configuration, List<String>
validSegments) {
    +    configuration.set(CarbonInputFormatNew.INPUT_SEGMENT_NUMBERS,
    +        CarbonUtil.getSegmentString(validSegments));
    +  }
    +
    +  /**
    +   * Set list of files to access
    +   */
    +  public static void setFilesToAccess(Configuration configuration, List<String>
validFiles) {
    +    configuration.set(CarbonInputFormatNew.INPUT_FILES, CarbonUtil.getSegmentString(validFiles));
    +  }
    +
    +  private static AbsoluteTableIdentifier getAbsoluteTableIdentifier(Configuration configuration)
    +      throws IOException {
    +    return getCarbonTable(configuration).getAbsoluteTableIdentifier();
    +  }
    +
    +  /**
    +   * {@inheritDoc}
    +   * Configurations FileInputFormat.INPUT_DIR
    +   * are used to get table path to read.
    +   *
    +   * @param job
    +   * @return List<InputSplit> list of CarbonInputSplit
    +   * @throws IOException
    +   */
    +  @Override public List<InputSplit> getSplits(JobContext job) throws IOException
{
    +    AbsoluteTableIdentifier identifier = getAbsoluteTableIdentifier(job.getConfiguration());
    +    AbstractTableDataMap blockletMap =
    +        DataMapStoreManager.getInstance().getDataMap(identifier, "blocklet", DataMapType.BLOCKLET);
    +    List<String> invalidSegments = new ArrayList<>();
    +    List<UpdateVO> invalidTimestampsList = new ArrayList<>();
    +
    +    // get all valid segments and set them into the configuration
    +    if (getSegmentsToAccess(job).length == 0) {
    +      SegmentStatusManager segmentStatusManager = new SegmentStatusManager(identifier);
    +      SegmentStatusManager.ValidAndInvalidSegmentsInfo segments =
    +          segmentStatusManager.getValidAndInvalidSegments();
    +      SegmentUpdateStatusManager updateStatusManager = new SegmentUpdateStatusManager(identifier);
    +      setSegmentsToAccess(job.getConfiguration(), segments.getValidSegments());
    --- End diff --
    
    just pass the segment list to `getSplit` at line 290, instead of setting it in configuration


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