Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/20096#discussion_r159728249
--- Diff:
external/kafka-0-10-sql/src/main/scala/org/apache/spark/sql/kafka010/KafkaSinkV2.scala
---
@@ -0,0 +1,142 @@
+/*
+ * 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.kafka010
+
+import org.apache.kafka.clients.producer.{Callback, ProducerRecord,
RecordMetadata}
+
+import org.apache.spark.internal.Logging
+import org.apache.spark.sql.{Row, SparkSession}
+import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.expressions.{Attribute, Cast,
Literal, UnsafeProjection}
+import
org.apache.spark.sql.kafka010.KafkaSourceProvider.{kafkaParamsForProducer,
TOPIC_OPTION_KEY}
+import org.apache.spark.sql.sources.v2.streaming.writer.ContinuousWriter
+import org.apache.spark.sql.sources.v2.writer._
+import org.apache.spark.sql.streaming.OutputMode
+import org.apache.spark.sql.types.{BinaryType, StringType, StructType}
+
+class ContinuousKafkaWriter(
+ topic: Option[String], producerParams: Map[String, String], schema:
StructType)
+ extends ContinuousWriter with SupportsWriteInternalRow {
+
+ override def createInternalRowWriterFactory(): KafkaWriterFactory =
+ KafkaWriterFactory(topic, producerParams, schema)
+
+ override def commit(epochId: Long, messages:
Array[WriterCommitMessage]): Unit = {}
+ override def abort(messages: Array[WriterCommitMessage]): Unit = {}
+}
+
+case class KafkaWriterFactory(
+ topic: Option[String], producerParams: Map[String, String], schema:
StructType)
+ extends DataWriterFactory[InternalRow] {
+
+ override def createDataWriter(partitionId: Int, attemptNumber: Int):
DataWriter[InternalRow] = {
+ new KafkaDataWriter(topic, producerParams, schema.toAttributes)
+ }
+}
+
+case class KafkaWriterCommitMessage() extends WriterCommitMessage {}
--- End diff --
If there is no param, then this can be a `case object`. And I dont think
`{}` is needed.
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