How to use

getInputJobInfosFromConf

method

in

org.apache.hive.hcatalog.common.HCatUtil

public static InputJobInfo getLastInputJobInfosFromConf(Configuration conf)
    throws IOException {
 LinkedList<InputJobInfo> inputJobInfos = getInputJobInfosFromConf(conf);
 if (inputJobInfos == null || inputJobInfos.isEmpty()) {
  return null;
 } else {
  return getInputJobInfosFromConf(conf).getLast();
 }
}

/**
 * Get statistics about the data to be loaded. Only input data size is implemented at this time.
 */
@Override
public ResourceStatistics getStatistics(String location, Job job) throws IOException {
 try {
  if (dbName == null || tableName == null) {
   throw new IOException("DB or table name unset. setLocation() must be invoked on this " +
       "loader to set them");
  }
  ResourceStatistics stats = new ResourceStatistics();
  long inputSize = -1;
  LinkedList<InputJobInfo> inputJobInfos = HCatUtil.getInputJobInfosFromConf(
      job.getConfiguration());
  for (InputJobInfo inputJobInfo : inputJobInfos) {
   if (dbName.equals(inputJobInfo.getDatabaseName()) && tableName.equals(inputJobInfo.getTableName())){
    inputSize = getSizeInBytes(inputJobInfo);
    break;
   }
  }
  if (inputSize == -1) {
   throw new IOException("Could not calculate input size for database: " + dbName + ", " +
       "table: " + tableName + ". Requested location:" + location);
  }
  stats.setSizeInBytes(inputSize);
  return stats;
 } catch (Exception e) {
  throw new IOException(e);
 }
}

 @Test
 public void testInputJobInfoInConf() throws Exception {
  Configuration conf = new Configuration(false);

  InputJobInfo inputJobInfo = HCatUtil.getLastInputJobInfosFromConf(conf);
  Assert.assertNull(inputJobInfo);
  List<InputJobInfo> inputJobInfos = HCatUtil.getInputJobInfosFromConf(conf);
  Assert.assertNull(inputJobInfos);

  InputJobInfo inputJobInfo0 = InputJobInfo.create("db", "table", "", new Properties());
  InputJobInfo inputJobInfo1 = InputJobInfo.create("db", "table2", "", new Properties());

  HCatUtil.putInputJobInfoToConf(inputJobInfo0, conf);
  HCatUtil.putInputJobInfoToConf(inputJobInfo1, conf);

  inputJobInfo = HCatUtil.getLastInputJobInfosFromConf(conf);
  inputJobInfos = HCatUtil.getInputJobInfosFromConf(conf);

  Assert.assertEquals(inputJobInfo1.getDatabaseName(), inputJobInfo.getDatabaseName());
  Assert.assertEquals(inputJobInfo1.getTableName(), inputJobInfo.getTableName());
  Assert.assertEquals(inputJobInfo0.getDatabaseName(), inputJobInfos.get(0).getDatabaseName());
  Assert.assertEquals(inputJobInfo0.getTableName(), inputJobInfos.get(0).getTableName());

 }
}