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From tdas <...@git.apache.org>
Subject [GitHub] spark pull request #20243: [SPARK-23052][SS] Migrate ConsoleSink to data sou...
Date Wed, 17 Jan 2018 06:48:45 GMT
Github user tdas commented on a diff in the pull request:

    https://github.com/apache/spark/pull/20243#discussion_r161967927
  
    --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/sources/PackedRowWriterFactory.scala
---
    @@ -0,0 +1,50 @@
    +/*
    + * 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.spark.sql.execution.streaming.sources
    +
    +import scala.collection.mutable
    +
    +import org.apache.spark.internal.Logging
    +import org.apache.spark.sql.Row
    +import org.apache.spark.sql.sources.v2.writer.{DataWriter, DataWriterFactory, WriterCommitMessage}
    +
    +/**
    + * A simple [[DataWriterFactory]] whose tasks just pack rows into the commit message
for delivery
    + * to a [[org.apache.spark.sql.sources.v2.writer.DataSourceV2Writer]] on the driver.
    + */
    +case object PackedRowWriterFactory extends DataWriterFactory[Row] {
    +  def createDataWriter(partitionId: Int, attemptNumber: Int): DataWriter[Row] = {
    +    new PackedRowDataWriter()
    +  }
    +}
    +
    +case class PackedRowCommitMessage(rows: Array[Row]) extends WriterCommitMessage
    +
    +class PackedRowDataWriter() extends DataWriter[Row] with Logging {
    --- End diff --
    
    add docs.


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