parquet.hadoop.thrift.ThriftToParquetFileWriter Maven / Gradle / Ivy

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/**
 * Copyright 2012 Twitter, Inc.
 *
 * Licensed 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 parquet.hadoop.thrift;

import java.io.Closeable;
import java.io.IOException;

import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.mapreduce.RecordWriter;
import org.apache.hadoop.mapreduce.TaskAttemptContext;
import org.apache.thrift.TBase;
import org.apache.thrift.protocol.TProtocolFactory;

import parquet.thrift.ReadWriteErrorHandler;

/**
 * To create a Parquet file from the Thrift binary of records
 *
 * @author Julien Le Dem
 *
 */
public class ThriftToParquetFileWriter implements Closeable {

  private final RecordWriter recordWriter;
  private final TaskAttemptContext taskAttemptContext;

  /**
   * defaults to buffered = true
   * @param fileToCreate the file to create. If null will create the default file name from the taskAttemptContext
   * @param taskAttemptContext The current taskAttemptContext
   * @param protocolFactory to create protocols to read the incoming bytes
   * @param thriftClass to produce the schema
   * @throws IOException if there was a problem writing
   * @throws InterruptedException from the underlying Hadoop API
   */
  public ThriftToParquetFileWriter(
      Path fileToCreate,
      TaskAttemptContext taskAttemptContext,
      TProtocolFactory protocolFactory,
      Class> thriftClass)
          throws IOException, InterruptedException {
    this(fileToCreate, taskAttemptContext, protocolFactory, thriftClass, true, null);
  }

  /**
   * defaults to buffered = true
   * @param fileToCreate the file to create. If null will create the default file name from the taskAttemptContext
   * @param taskAttemptContext The current taskAttemptContext
   * @param protocolFactory to create protocols to read the incoming bytes
   * @param thriftClass to produce the schema
   * @param errorHandler to define what to do when failing to read a record
   * @throws IOException if there was a problem writing
   * @throws InterruptedException from the underlying Hadoop API
   */
  public ThriftToParquetFileWriter(
      Path fileToCreate,
      TaskAttemptContext taskAttemptContext,
      TProtocolFactory protocolFactory,
      Class> thriftClass,
      ReadWriteErrorHandler errorHandler) throws IOException, InterruptedException {
    this(fileToCreate, taskAttemptContext, protocolFactory, thriftClass, true, errorHandler);
  }

  /**
   * @param fileToCreate the file to create. If null will create the default file name from the taskAttemptContext
   * @param taskAttemptContext The current taskAttemptContext
   * @param protocolFactory to create protocols to read the incoming bytes
   * @param thriftClass to produce the schema
   * @param buffered buffer each record individually
   * @throws IOException if there was a problem writing
   * @throws InterruptedException from the underlying Hadoop API
   */
  public ThriftToParquetFileWriter(
      Path fileToCreate,
      TaskAttemptContext taskAttemptContext,
      TProtocolFactory protocolFactory,
      Class> thriftClass,
      boolean buffered,
      ReadWriteErrorHandler errorHandler) throws IOException, InterruptedException {
    this.taskAttemptContext = taskAttemptContext;
    this.recordWriter = new ParquetThriftBytesOutputFormat(protocolFactory, thriftClass, buffered, errorHandler).getRecordWriter(taskAttemptContext, fileToCreate);
  }

  /**
   * write one record to the columnar store
   * @param bytes
   * @throws IOException
   * @throws InterruptedException
   */
  public void write(BytesWritable bytes) throws IOException, InterruptedException {
    recordWriter.write(null, bytes);
  }

  /**
   * close the file
   *
   * @see java.io.Closeable#close()
   */
  @Override
  public void close() throws IOException {
    try {
      recordWriter.close(taskAttemptContext);
    } catch (InterruptedException e) {
      Thread.interrupted();
      throw new IOException("The thread was interrupted", e);
    }
  }
}