blob: 97f56a64d600f28181c4792993c5c94abd7f4d3b (
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
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
/*
* 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.internal.config
import java.util.{Map => JMap}
/**
* A source of configuration values.
*/
private[spark] trait ConfigProvider {
def get(key: String): Option[String]
}
private[spark] class EnvProvider extends ConfigProvider {
override def get(key: String): Option[String] = sys.env.get(key)
}
private[spark] class SystemProvider extends ConfigProvider {
override def get(key: String): Option[String] = sys.props.get(key)
}
private[spark] class MapProvider(conf: JMap[String, String]) extends ConfigProvider {
override def get(key: String): Option[String] = Option(conf.get(key))
}
/**
* A config provider that only reads Spark config keys, and considers default values for known
* configs when fetching configuration values.
*/
private[spark] class SparkConfigProvider(conf: JMap[String, String]) extends ConfigProvider {
import ConfigEntry._
override def get(key: String): Option[String] = {
if (key.startsWith("spark.")) {
Option(conf.get(key)).orElse(defaultValueString(key))
} else {
None
}
}
private def defaultValueString(key: String): Option[String] = {
findEntry(key) match {
case e: ConfigEntryWithDefault[_] => Option(e.defaultValueString)
case e: ConfigEntryWithDefaultString[_] => Option(e.defaultValueString)
case e: FallbackConfigEntry[_] => get(e.fallback.key)
case _ => None
}
}
}
|
