org.apache.spark.sql.execution.streaming.sources.MicroBatchWriter.scala 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.spark.sql.execution.streaming.sources
import org.apache.spark.sql.Row
import org.apache.spark.sql.catalyst.InternalRow
import org.apache.spark.sql.sources.v2.writer.{DataSourceWriter, DataWriterFactory, SupportsWriteInternalRow, WriterCommitMessage}
import org.apache.spark.sql.sources.v2.writer.streaming.StreamWriter
/**
* A [[DataSourceWriter]] used to hook V2 stream writers into a microbatch plan. It implements
* the non-streaming interface, forwarding the batch ID determined at construction to a wrapped
* streaming writer.
*/
class MicroBatchWriter(batchId: Long, writer: StreamWriter) extends DataSourceWriter {
override def commit(messages: Array[WriterCommitMessage]): Unit = {
writer.commit(batchId, messages)
}
override def abort(messages: Array[WriterCommitMessage]): Unit = writer.abort(batchId, messages)
override def createWriterFactory(): DataWriterFactory[Row] = writer.createWriterFactory()
}
class InternalRowMicroBatchWriter(batchId: Long, writer: StreamWriter)
extends DataSourceWriter with SupportsWriteInternalRow {
override def commit(messages: Array[WriterCommitMessage]): Unit = {
writer.commit(batchId, messages)
}
override def abort(messages: Array[WriterCommitMessage]): Unit = writer.abort(batchId, messages)
override def createInternalRowWriterFactory(): DataWriterFactory[InternalRow] =
writer match {
case w: SupportsWriteInternalRow => w.createInternalRowWriterFactory()
case _ => throw new IllegalStateException(
"InternalRowMicroBatchWriter should only be created with base writer support")
}
}