spark StreamProgress 源码
spark StreamProgress 代码
文件路径：/sql/core/src/main/scala-2.13/org/apache/spark/sql/execution/streaming/StreamProgress.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
import scala.collection.immutable
import org.apache.spark.sql.connector.read.streaming.{Offset => OffsetV2, SparkDataStream}
/**
* A helper class that looks like a Map[Source, Offset].
*/
class StreamProgress(
val baseMap: immutable.Map[SparkDataStream, OffsetV2] =
new immutable.HashMap[SparkDataStream, OffsetV2])
extends scala.collection.immutable.Map[SparkDataStream, OffsetV2] {
// Note: this class supports Scala 2.13. A parallel source tree has a 2.12 implementation.
def toOffsetSeq(source: Seq[SparkDataStream], metadata: OffsetSeqMetadata): OffsetSeq = {
OffsetSeq(source.map(get), Some(metadata))
}
override def toString: String =
baseMap.map { case (k, v) => s"$k: $v"}.mkString("{", ",", "}")
override def updated[B1 >: OffsetV2](key: SparkDataStream, value: B1): Map[SparkDataStream, B1] =
baseMap + (key -> value)
override def get(key: SparkDataStream): Option[OffsetV2] = baseMap.get(key)
override def iterator: Iterator[(SparkDataStream, OffsetV2)] = baseMap.iterator
override def removed(key: SparkDataStream): Map[SparkDataStream, OffsetV2] = baseMap - key
def ++(updates: IterableOnce[(SparkDataStream, OffsetV2)]): StreamProgress = {
new StreamProgress(baseMap ++ updates)
}
}
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