felixcheung commented on a change in pull request #24730: [SPARK-27835][Core]
Resource Scheduling: change driver config from addresses
URL: https://github.com/apache/spark/pull/24730#discussion_r288858863
##########
File path: core/src/main/scala/org/apache/spark/ResourceDiscoverer.scala
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@@ -132,4 +132,20 @@ private[spark] object ResourceDiscoverer extends Logging {
}
}
}
+
+ def parseAllocatedFromJsonFile(resourcesFile: String): Map[String,
ResourceInformation] = {
+ implicit val formats = DefaultFormats
+ // case class to make json4s parsing easy
+ case class JsonResourceInformation(val name: String, val addresses:
Array[String])
+ val resourceInput = new BufferedInputStream(new
FileInputStream(resourcesFile))
+ val resources = try {
+ parse(resourceInput).extract[Seq[JsonResourceInformation]]
+ } catch {
+ case e@(_: MappingException | _: MismatchedInputException | _:
ClassCastException) =>
+ throw new SparkException(s"Exception parsing the resources in
$resourcesFile", e)
+ } finally {
+ resourceInput.close()
+ }
+ resources.map(r => (r.name, new ResourceInformation(r.name,
r.addresses))).toMap
Review comment:
ah yes ;) I just mean it walking through a `Seq` when the goal is a `Map`
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