spark functionResources 源码
spark functionResources 代码
文件路径：/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/catalog/functionResources.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.catalyst.catalog
import java.util.Locale
import org.apache.spark.sql.errors.QueryCompilationErrors
/** A trait that represents the type of a resourced needed by a function. */
abstract class FunctionResourceType(val resourceType: String)
object JarResource extends FunctionResourceType("jar")
object FileResource extends FunctionResourceType("file")
// We do not allow users to specify an archive because it is YARN specific.
// When loading resources, we will throw an exception and ask users to
// use --archive with spark submit.
object ArchiveResource extends FunctionResourceType("archive")
object FunctionResourceType {
def fromString(resourceType: String): FunctionResourceType = {
resourceType.toLowerCase(Locale.ROOT) match {
case "jar" => JarResource
case "file" => FileResource
case "archive" => ArchiveResource
case other =>
throw QueryCompilationErrors.resourceTypeNotSupportedError(resourceType)
}
}
}
case class FunctionResource(resourceType: FunctionResourceType, uri: String)
/**
* A simple trait representing a class that can be used to load resources used by
* a function. Because only a SQLContext can load resources, we create this trait
* to avoid of explicitly passing SQLContext around.
*/
trait FunctionResourceLoader {
def loadResource(resource: FunctionResource): Unit
}
object DummyFunctionResourceLoader extends FunctionResourceLoader {
override def loadResource(resource: FunctionResource): Unit = {
throw new UnsupportedOperationException
}
}
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