spark MicroBatchWrite 源码
spark MicroBatchWrite 代码
文件路径：/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/sources/MicroBatchWrite.scala
/*
* 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.catalyst.InternalRow
import org.apache.spark.sql.connector.write.{BatchWrite, DataWriter, DataWriterFactory, PhysicalWriteInfo, WriterCommitMessage}
import org.apache.spark.sql.connector.write.streaming.{StreamingDataWriterFactory, StreamingWrite}
/**
* A [[BatchWrite]] used to hook V2 stream writers into a microbatch plan. It implements
* the non-streaming interface, forwarding the epoch ID determined at construction to a wrapped
* streaming write support.
*/
class MicroBatchWrite(epochId: Long, val writeSupport: StreamingWrite) extends BatchWrite {
override def toString: String = {
s"MicroBathWrite[epoch: $epochId, writer: $writeSupport]"
}
override def commit(messages: Array[WriterCommitMessage]): Unit = {
writeSupport.commit(epochId, messages)
}
override def abort(messages: Array[WriterCommitMessage]): Unit = {
writeSupport.abort(epochId, messages)
}
override def createBatchWriterFactory(info: PhysicalWriteInfo): DataWriterFactory = {
new MicroBatchWriterFactory(epochId, writeSupport.createStreamingWriterFactory(info))
}
}
class MicroBatchWriterFactory(epochId: Long, streamingWriterFactory: StreamingDataWriterFactory)
extends DataWriterFactory {
override def createWriter(partitionId: Int, taskId: Long): DataWriter[InternalRow] = {
streamingWriterFactory.createWriter(partitionId, taskId, epochId)
}
}
相关信息
相关文章
spark ConsoleStreamingWrite 源码
spark ContinuousMemoryStream 源码
spark PackedRowWriterFactory 源码
spark RatePerMicroBatchProvider 源码
spark RatePerMicroBatchStream 源码
0
赞
- 所属分类： 前端技术
- 本文标签：
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
7、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦