Java HCatRecord类代码示例

import org.apache.hive.hcatalog.data.HCatRecord; //导入依赖的package包/类
private List<HCatRecord> generateHCatRecords(int numRecords,
  HCatSchema hCatTblSchema, ColumnGenerator... extraCols) throws Exception {
  List<HCatRecord> records = new ArrayList<HCatRecord>();
  List<HCatFieldSchema> hCatTblCols = hCatTblSchema.getFields();
  int size = hCatTblCols.size();
  for (int i = 0; i < numRecords; ++i) {
    DefaultHCatRecord record = new DefaultHCatRecord(size);
    record.set(hCatTblCols.get(0).getName(), hCatTblSchema, i);
    record.set(hCatTblCols.get(1).getName(), hCatTblSchema, "textfield" + i);
    int idx = 0;
    for (int j = 0; j < extraCols.length; ++j) {
      if (extraCols[j].getKeyType() == KeyType.STATIC_KEY) {
        continue;
      }
      record.set(hCatTblCols.get(idx + 2).getName(), hCatTblSchema,
        extraCols[j].getHCatValue(i));
      ++idx;
    }

    records.add(record);
  }
  return records;
}
 

import org.apache.hive.hcatalog.data.HCatRecord; //导入依赖的package包/类
/**
 * Calculates the 'desired' number of splits based on desiredBundleSizeBytes which is passed as
 * a hint to native API. Retrieves the actual splits generated by native API, which could be
 * different from the 'desired' split count calculated using desiredBundleSizeBytes
 */
@Override
public List<BoundedSource<HCatRecord>> split(
    long desiredBundleSizeBytes, PipelineOptions options) throws Exception {
  int desiredSplitCount = 1;
  long estimatedSizeBytes = getEstimatedSizeBytes(options);
  if (desiredBundleSizeBytes > 0 && estimatedSizeBytes > 0) {
    desiredSplitCount = (int) Math.ceil((double) estimatedSizeBytes / desiredBundleSizeBytes);
  }
  ReaderContext readerContext = getReaderContext(desiredSplitCount);
  //process the splits returned by native API
  //this could be different from 'desiredSplitCount' calculated above
  LOG.info(
      "Splitting into bundles of {} bytes: "
          + "estimated size {}, desired split count {}, actual split count {}",
      desiredBundleSizeBytes,
      estimatedSizeBytes,
      desiredSplitCount,
      readerContext.numSplits());

  List<BoundedSource<HCatRecord>> res = new ArrayList<>();
  for (int split = 0; split < readerContext.numSplits(); split++) {
    res.add(new BoundedHCatalogSource(spec.withContext(readerContext).withSplitId(split)));
  }
  return res;
}
 

import org.apache.hive.hcatalog.data.HCatRecord; //导入依赖的package包/类
/** Test of Read using SourceTestUtils.readFromSource(..). */
@Test
@NeedsTestData
public void testReadFromSource() throws Exception {
  ReaderContext context = getReaderContext(getConfigPropertiesAsMap(service.getHiveConf()));
  HCatalogIO.Read spec =
      HCatalogIO.read()
          .withConfigProperties(getConfigPropertiesAsMap(service.getHiveConf()))
          .withContext(context)
          .withTable(TEST_TABLE);

  List<String> records = new ArrayList<>();
  for (int i = 0; i < context.numSplits(); i++) {
    BoundedHCatalogSource source = new BoundedHCatalogSource(spec.withSplitId(i));
    for (HCatRecord record : SourceTestUtils.readFromSource(source, OPTIONS)) {
      records.add(record.get(0).toString());
    }
  }
  assertThat(records, containsInAnyOrder(getExpectedRecords(TEST_RECORDS_COUNT).toArray()));
}
 

import org.apache.hive.hcatalog.data.HCatRecord; //导入依赖的package包/类
/** Test of Read using SourceTestUtils.assertSourcesEqualReferenceSource(..). */
@Test
@NeedsTestData
public void testSourceEqualsSplits() throws Exception {
  final int numRows = 1500;
  final int numSamples = 10;
  final long bytesPerRow = 15;
  ReaderContext context = getReaderContext(getConfigPropertiesAsMap(service.getHiveConf()));
  HCatalogIO.Read spec =
      HCatalogIO.read()
          .withConfigProperties(getConfigPropertiesAsMap(service.getHiveConf()))
          .withContext(context)
          .withTable(TEST_TABLE);

  BoundedHCatalogSource source = new BoundedHCatalogSource(spec);
  List<BoundedSource<HCatRecord>> unSplitSource = source.split(-1, OPTIONS);
  assertEquals(1, unSplitSource.size());

  List<BoundedSource<HCatRecord>> splits =
      source.split(numRows * bytesPerRow / numSamples, OPTIONS);
  assertTrue(splits.size() >= 1);

  SourceTestUtils.assertSourcesEqualReferenceSource(unSplitSource.get(0), splits, OPTIONS);
}
 

import org.apache.hive.hcatalog.data.HCatRecord; //导入依赖的package包/类
@Override
public void map(T key, HCatRecord value, Context context) throws IOException, InterruptedException {

    HCatFieldSchema field;
    Object fieldValue;
    for (int m = 0; m < columnSize; m++) {
        field = schema.get(m);
        fieldValue = value.get(field.getName(), schema);
        if (fieldValue == null)
            fieldValue = "NULL";
        
        if (counter < 5 && m < 10) {
            System.out.println("Get row " + counter + " column '" + field.getName() + "'  value: " + fieldValue);
        }

        if (fieldValue != null)
            getHllc(m).add(Bytes.toBytes(fieldValue.toString()));
    }

    counter++;
}
 

import org.apache.hive.hcatalog.data.HCatRecord; //导入依赖的package包/类
@Override
public void map(KEYIN key, HCatRecord record, Context context) throws IOException, InterruptedException {

    try {

        int[] flatTableIndexes = intermediateTableDesc.getRowKeyColumnIndexes();
        HCatFieldSchema fieldSchema = null;
        for (int i : factDictCols) {
            outputKey.set((short) i);
            fieldSchema = schema.get(flatTableIndexes[i]);
            Object fieldValue = record.get(fieldSchema.getName(), schema);
            if (fieldValue == null)
                continue;
            byte[] bytes = Bytes.toBytes(fieldValue.toString());
            outputValue.set(bytes, 0, bytes.length);
            context.write(outputKey, outputValue);
        }
    } catch (Exception ex) {
        handleErrorRecord(record, ex);
    }

}
 

import org.apache.hive.hcatalog.data.HCatRecord; //导入依赖的package包/类
@Override
public void map(KEYIN key, HCatRecord record, Context context) throws IOException, InterruptedException {

    HCatFieldSchema fieldSchema = null;
    for (short i = 0; i < columnSize; i++) {
        outputKey.set(i);
        fieldSchema = schema.get(i);
        Object fieldValue = record.get(fieldSchema.getName(), schema);
        if (fieldValue == null)
            continue;
        byte[] bytes = Bytes.toBytes(fieldValue.toString());
        outputValue.set(bytes, 0, bytes.length);
        context.write(outputKey, outputValue);
    }

}
 

import org.apache.hive.hcatalog.data.HCatRecord; //导入依赖的package包/类
@Override
public LabeledPoint call(Tuple2<WritableComparable, HCatRecord> tuple) throws Exception {
  HCatRecord record = tuple._2();

  if (record == null) {
    log.info("@@@ Null record");
    return defaultLabeledPoint;
  }

  double[] features = new double[numFeatures];

  for (int i = 0; i < numFeatures; i++) {
    int featurePos = featurePositions[i];
    features[i] = featureValueMappers[i].call(record.get(featurePos));
  }

  double label = featureValueMappers[labelColumnPos].call(record.get(labelColumnPos));
  return new LabeledPoint(label, Vectors.dense(features));
}
 

import org.apache.hive.hcatalog.data.HCatRecord; //导入依赖的package包/类
private void insert(Map<String, String> partitionSpec, Iterable<HCatRecord> rows) {
  WriteEntity entity = new WriteEntity.Builder()
      .withDatabase(databaseName)
      .withTable(tableName)
      .withPartition(partitionSpec)
      .build();

  try {
    HCatWriter master = DataTransferFactory.getHCatWriter(entity, config);
    WriterContext context = master.prepareWrite();
    HCatWriter writer = DataTransferFactory.getHCatWriter(context);
    writer.write(rows.iterator());
    master.commit(context);
  } catch (HCatException e) {
    throw new RuntimeException("An error occurred while inserting data to " + databaseName + "." + tableName, e);
  }
}
 

import org.apache.hive.hcatalog.data.HCatRecord; //导入依赖的package包/类
@Test
public void testPartitionedSimple() {
  HCatTable table = table().cols(columns(COLUMN_1)).partCols(columns(PARTITION_COLUMN_1));

  Multimap<Map<String, String>, HCatRecord> data = new TableDataBuilder(table)
      .addRow("value", "partition_value")
      .build();

  assertEquals(1, data.size());

  Map<String, String> partitionSpec = new HashMap<>();
  partitionSpec.put(PARTITION_COLUMN_1, "partition_value");

  Collection<HCatRecord> rows = data.get(partitionSpec);
  assertEquals(1, rows.size());
  HCatRecord row = rows.iterator().next();
  assertEquals(Arrays.asList((Object) "value", "partition_value"), row.getAll());
}
 

import org.apache.hive.hcatalog.data.HCatRecord; //导入依赖的package包/类
public HCatalogRootParser( final HCatRecord record , final HCatSchema schema ) throws IOException{
  this.record = record;

  fieldIndexMap = new HashMap<String,Integer>();
  converterList = new ArrayList<IHCatalogPrimitiveConverter>();
  schemaList = new ArrayList<HCatFieldSchema>();

  for( int i = 0 ; i < schema.size() ; i++ ){
    HCatFieldSchema fieldSchema = schema.get(i);
    fieldIndexMap.put( fieldSchema.getName() , Integer.valueOf(i) );
    converterList.add( HCatalogPrimitiveConverterFactory.get( fieldSchema ) );
    schemaList.add( schema.get(i) );
  }
}
 

import org.apache.hive.hcatalog.data.HCatRecord; //导入依赖的package包/类
@Override
public void map(LongWritable key, HCatRecord hcr, Context context)
  throws IOException, InterruptedException {
  SqoopRecord sqr = helper.convertToSqoopRecord(hcr);
  writeSqoopRecord(sqr);
  context.progress();
}
 

import org.apache.hive.hcatalog.data.HCatRecord; //导入依赖的package包/类
public SqoopRecord convertToSqoopRecord(HCatRecord hcr)
  throws IOException {
  Text key = new Text();
  for (Map.Entry<String, Object> e : sqoopRecord.getFieldMap().entrySet()) {
    String colName = e.getKey();
    String hfn = colName.toLowerCase();
    key.set(hfn);
    Object hCatVal = hcr.get(hfn, hCatFullTableSchema);
    if (!isOdps) {
      String javaColType = colTypesJava.get(key).toString();
      int sqlType = ((IntWritable) colTypesSql.get(key)).get();
      HCatFieldSchema field = hCatFullTableSchema.get(hfn);
      HCatFieldSchema.Type fieldType = field.getType();
      String hCatTypeString = field.getTypeString();
      Object sqlVal = convertToSqoop(hCatVal, fieldType, javaColType, hCatTypeString);
      if (debugHCatExportMapper) {
        LOG.debug("hCatVal " + hCatVal + " of type "
            + (hCatVal == null ? null : hCatVal.getClass().getName()) + ",sqlVal " + sqlVal
            + " of type " + (sqlVal == null ? null : sqlVal.getClass().getName()) + ",java type "
            + javaColType + ", sql type = " + SqoopHCatUtilities.sqlTypeString(sqlType));
      }
      sqoopRecord.setField(colName, sqlVal);
    } else {
      sqoopRecord.setField(colName, hCatVal == null ? null : hCatVal.toString());
    }
  }
  return sqoopRecord;
}
 

import org.apache.hive.hcatalog.data.HCatRecord; //导入依赖的package包/类
@Override
public RecordReader<WritableComparable, HCatRecord>
  createRecordReader(InputSplit split,
    TaskAttemptContext taskContext)
    throws IOException, InterruptedException {
  LOG.debug("Creating a SqoopHCatRecordReader");
  return new SqoopHCatRecordReader(split, taskContext, this);
}
 

import org.apache.hive.hcatalog.data.HCatRecord; //导入依赖的package包/类
public RecordReader<WritableComparable, HCatRecord>
  createHCatRecordReader(InputSplit split,
    TaskAttemptContext taskContext)
    throws IOException, InterruptedException {
  LOG.debug("Creating a base HCatRecordReader");
  return super.createRecordReader(split, taskContext);
}