blob: 20ade12e3796ac5cc3422a738aa8c824d08f030e (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
/*
* 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.mutable
import org.apache.hadoop.fs.{FileStatus, Path}
import org.apache.spark.sql.SparkSession
import org.apache.spark.sql.execution.datasources._
/**
* A [[FileCatalog]] that generates the list of files to processing by reading them from the
* metadata log files generated by the [[FileStreamSink]].
*/
class MetadataLogFileCatalog(sparkSession: SparkSession, path: Path)
extends PartitioningAwareFileCatalog(sparkSession, Map.empty, None) {
private val metadataDirectory = new Path(path, FileStreamSink.metadataDir)
logInfo(s"Reading streaming file log from $metadataDirectory")
private val metadataLog = new FileStreamSinkLog(sparkSession, metadataDirectory.toUri.toString)
private val allFilesFromLog = metadataLog.allFiles().map(_.toFileStatus).filterNot(_.isDirectory)
private var cachedPartitionSpec: PartitionSpec = _
override protected val leafFiles: mutable.LinkedHashMap[Path, FileStatus] = {
new mutable.LinkedHashMap ++= allFilesFromLog.map(f => f.getPath -> f)
}
override protected val leafDirToChildrenFiles: Map[Path, Array[FileStatus]] = {
allFilesFromLog.toArray.groupBy(_.getPath.getParent)
}
override def paths: Seq[Path] = path :: Nil
override def refresh(): Unit = { }
override def partitionSpec(): PartitionSpec = {
if (cachedPartitionSpec == null) {
cachedPartitionSpec = inferPartitioning()
}
cachedPartitionSpec
}
}
|