Github user ueshin commented on a diff in the pull request:
https://github.com/apache/spark/pull/19717#discussion_r154022151
--- Diff:
resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/k8s/submit/Client.scala
---
@@ -0,0 +1,234 @@
+/*
+ * 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.deploy.k8s.submit
+
+import java.util.{Collections, UUID}
+
+import scala.collection.JavaConverters._
+import scala.collection.mutable
+import scala.util.control.NonFatal
+
+import io.fabric8.kubernetes.api.model._
+import io.fabric8.kubernetes.client.KubernetesClient
+
+import org.apache.spark.SparkConf
+import org.apache.spark.deploy.SparkApplication
+import org.apache.spark.deploy.k8s.Config._
+import org.apache.spark.deploy.k8s.Constants._
+import org.apache.spark.deploy.k8s.KubernetesClientFactory
+import org.apache.spark.deploy.k8s.submit.steps.DriverConfigurationStep
+import org.apache.spark.internal.Logging
+import org.apache.spark.util.Utils
+
+/**
+ * Encapsulates arguments to the submission client.
+ *
+ * @param mainAppResource the main application resource
+ * @param mainClass the main class of the application to run
+ * @param driverArgs arguments to the driver
+ */
+private[spark] case class ClientArguments(
+ mainAppResource: MainAppResource,
+ mainClass: String,
+ driverArgs: Array[String])
+
+private[spark] object ClientArguments {
+
+ def fromCommandLineArgs(args: Array[String]): ClientArguments = {
+ var mainAppResource: Option[MainAppResource] = None
+ var mainClass: Option[String] = None
+ val driverArgs = mutable.ArrayBuffer.empty[String]
+
+ args.sliding(2, 2).toList.foreach {
+ case Array("--primary-java-resource", primaryJavaResource: String) =>
+ mainAppResource = Some(JavaMainAppResource(primaryJavaResource))
+ case Array("--main-class", clazz: String) =>
+ mainClass = Some(clazz)
+ case Array("--arg", arg: String) =>
+ driverArgs += arg
+ case other =>
+ val invalid = other.mkString(" ")
+ throw new RuntimeException(s"Unknown arguments: $invalid")
+ }
+
+ require(mainClass.isDefined, "Main class must be specified via
--main-class")
+
+ ClientArguments(
+ mainAppResource.get,
--- End diff --
Don't we need to check if `mainAppResource` is defined or not before here?
Otherwise some exception will be thrown if it is not defined.
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