org.apache.parquet.proto.ProtoParquetWriter Maven / Gradle / Ivy
/*
* 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.parquet.proto;
import com.google.protobuf.Message;
import com.google.protobuf.MessageOrBuilder;
import org.apache.hadoop.fs.Path;
import org.apache.parquet.hadoop.ParquetWriter;
import org.apache.parquet.hadoop.api.WriteSupport;
import org.apache.parquet.hadoop.metadata.CompressionCodecName;
import java.io.IOException;
/**
* Write Protobuf records to a Parquet file.
*/
public class ProtoParquetWriter extends ParquetWriter {
/**
* Create a new {@link ProtoParquetWriter}.
*
* @param file
* @param compressionCodecName
* @param blockSize
* @param pageSize
* @throws IOException
*/
public ProtoParquetWriter(Path file, Class protoMessage,
CompressionCodecName compressionCodecName, int blockSize,
int pageSize) throws IOException {
super(file, new ProtoWriteSupport(protoMessage),
compressionCodecName, blockSize, pageSize);
}
/**
* Create a new {@link ProtoParquetWriter}.
*
* @param file The file name to write to.
* @param compressionCodecName Compression code to use, or CompressionCodecName.UNCOMPRESSED
* @param blockSize HDFS block size
* @param pageSize See parquet write up. Blocks are subdivided into pages for alignment and other purposes.
* @param enableDictionary Whether to use a dictionary to compress columns.
* @param validating to turn on validation using the schema
* @throws IOException
*/
public ProtoParquetWriter(Path file, Class protoMessage,
CompressionCodecName compressionCodecName, int blockSize,
int pageSize, boolean enableDictionary, boolean validating) throws IOException {
super(file, new ProtoWriteSupport(protoMessage),
compressionCodecName, blockSize, pageSize, enableDictionary, validating);
}
/**
* Create a new {@link ProtoParquetWriter}. The default block size is 50 MB.The default
* page size is 1 MB. Default compression is no compression. (Inherited from {@link ParquetWriter})
*
* @param file The file name to write to.
* @throws IOException
*/
public ProtoParquetWriter(Path file, Class protoMessage) throws IOException {
this(file, protoMessage, CompressionCodecName.UNCOMPRESSED,
DEFAULT_BLOCK_SIZE, DEFAULT_PAGE_SIZE);
}
}