Scala ParquetWriter类代码示例

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本文整理汇总了Scala中org.apache.parquet.hadoop.ParquetWriter类的典型用法代码示例。如果您正苦于以下问题：Scala ParquetWriter类的具体用法？Scala ParquetWriter怎么用？Scala ParquetWriter使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。

在下文中一共展示了ParquetWriter类的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的Scala代码示例。

示例1: AvroParquetWriterFn

//设置package包名称以及导入依赖的类
package io.eels.component.parquet.avro

import com.sksamuel.exts.Logging
import io.eels.component.parquet.ParquetWriterConfig
import org.apache.avro.Schema
import org.apache.avro.generic.GenericRecord
import org.apache.hadoop.fs.Path
import org.apache.parquet.avro.AvroParquetWriter
import org.apache.parquet.hadoop.{ParquetFileWriter, ParquetWriter}


object AvroParquetWriterFn extends Logging {
  def apply(path: Path, avroSchema: Schema): ParquetWriter[GenericRecord] = {
    val config = ParquetWriterConfig()
    AvroParquetWriter.builder[GenericRecord](path)
      .withSchema(avroSchema)
      .withCompressionCodec(config.compressionCodec)
      .withPageSize(config.pageSize)
      .withRowGroupSize(config.blockSize)
      .withDictionaryEncoding(config.enableDictionary)
      .withWriteMode(ParquetFileWriter.Mode.CREATE)
      .withValidation(config.validating)
      .build()
  }
}

开发者ID:51zero，项目名称:eel-sdk，代码行数:26，代码来源:AvroParquetWriterFn.scala

示例2: ParquetWriterConfig

//设置package包名称以及导入依赖的类
package io.eels.component.parquet

import com.sksamuel.exts.Logging
import com.sksamuel.exts.config.ConfigSupport
import com.typesafe.config.{Config, ConfigFactory}
import org.apache.parquet.hadoop.ParquetWriter
import org.apache.parquet.hadoop.metadata.CompressionCodecName

case class ParquetWriterConfig(blockSize: Int,
                               pageSize: Int,
                               compressionCodec: CompressionCodecName,
                               enableDictionary: Boolean,
                               validating: Boolean)

object ParquetWriterConfig extends Logging with ConfigSupport {

  def apply(): ParquetWriterConfig = apply(ConfigFactory.load())
  def apply(config: Config): ParquetWriterConfig = {

    val blockSize: Int = config.getIntOrElse("eel.parquet.blockSize", ParquetWriter.DEFAULT_BLOCK_SIZE)
    val pageSize: Int = config.getIntOrElse("eel.parquet.pageSize", ParquetWriter.DEFAULT_PAGE_SIZE)
    val compressionCodec = config.getString("eel.parquet.compressionCodec").toLowerCase() match {
      case "gzip" => CompressionCodecName.GZIP
      case "lzo" => CompressionCodecName.LZO
      case "snappy" => CompressionCodecName.SNAPPY
      case _ => CompressionCodecName.UNCOMPRESSED
    }

    logger.debug(s"Parquet writer will use blockSize = $blockSize; pageSize = $pageSize; compressionCodec = $compressionCodec")
    ParquetWriterConfig(blockSize, pageSize, compressionCodec, true, true)
  }
}

开发者ID:51zero，项目名称:eel-sdk，代码行数:33，代码来源:ParquetWriterConfig.scala

示例3: RowParquetWriterFn

//设置package包名称以及导入依赖的类
package io.eels.component.parquet

import io.eels.Row
import io.eels.schema.StructType
import org.apache.hadoop.conf.Configuration
import org.apache.hadoop.fs.Path
import org.apache.parquet.column.ParquetProperties
import org.apache.parquet.hadoop.api.WriteSupport
import org.apache.parquet.hadoop.{ParquetFileWriter, ParquetWriter}
import org.apache.parquet.schema.MessageType

import scala.math.BigDecimal.RoundingMode.RoundingMode


object RowParquetWriterFn {

  class RowParquetWriterBuilder(path: Path,
                                schema: MessageType,
                                roundingMode: RoundingMode,
                                metadata: Map[String, String])
    extends ParquetWriter.Builder[Row, RowParquetWriterBuilder](path) {
    override def getWriteSupport(conf: Configuration): WriteSupport[Row] = new RowWriteSupport(schema, roundingMode, metadata)
    override def self(): RowParquetWriterBuilder = this
  }

  def apply(path: Path,
            schema: StructType,
            metadata: Map[String, String],
            dictionary: Boolean,
            roundingMode: RoundingMode): ParquetWriter[Row] = {
    val config = ParquetWriterConfig()
    val messageType = ParquetSchemaFns.toParquetMessageType(schema)
    new RowParquetWriterBuilder(path, messageType, roundingMode, metadata)
      .withCompressionCodec(config.compressionCodec)
      .withDictionaryEncoding(dictionary)
      .withDictionaryPageSize(ParquetProperties.DEFAULT_DICTIONARY_PAGE_SIZE)
      .withPageSize(config.pageSize)
      .withRowGroupSize(config.blockSize)
      .withValidation(config.validating)
      .withWriteMode(ParquetFileWriter.Mode.CREATE)
      .withWriterVersion(ParquetProperties.DEFAULT_WRITER_VERSION)
      .build()
  }
}

开发者ID:51zero，项目名称:eel-sdk，代码行数:45，代码来源:RowParquetWriterFn.scala

注：本文中的org.apache.parquet.hadoop.ParquetWriter类示例整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。