forked from apache/spark
/
SQLConf.scala
76 lines (61 loc) · 2.3 KB
/
SQLConf.scala
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
75
76
/*
* 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
import java.util.Properties
import scala.collection.JavaConverters._
/**
* SQLConf holds mutable config parameters and hints. These can be set and
* queried either by passing SET commands into Spark SQL's DSL
* functions (sql(), hql(), etc.), or by programmatically using setters and
* getters of this class.
*/
class SQLConf {
private val settings = java.util.Collections.synchronizedMap(
new java.util.HashMap[String, String]())
private[spark] def clear() {
settings.clear()
}
def this(props: Properties) = {
this()
props.asScala.foreach { case (k, v) => this.settings.put(k, v) }
}
def set(key: String, value: String): SQLConf = {
require(key != null, "key cannot be null")
require(value != null, s"value cannot be null for ${key}")
settings.put(key, value)
this
}
def get(key: String): String = {
if (!settings.containsKey(key)) {
throw new NoSuchElementException(key)
}
settings.get(key)
}
def get(key: String, defaultValue: String): String = {
if (!settings.containsKey(key)) defaultValue else settings.get(key)
}
def getAll: Array[(String, String)] = settings.asScala.toArray
def getOption(key: String): Option[String] = {
if (!settings.containsKey(key)) None else Some(settings.get(key))
}
def contains(key: String): Boolean = settings.containsKey(key)
def toDebugString: String = {
settings.synchronized {
settings.asScala.toArray.sorted.map{ case (k, v) => s"$k=$v" }.mkString("\n")
}
}
}