1 files changed, 53 insertions, 0 deletions
diff --git a/resource-managers/yarn/src/main/scala/org/apache/spark/launcher/YarnCommandBuilderUtils.scala b/resource-managers/yarn/src/main/scala/org/apache/spark/launcher/YarnCommandBuilderUtils.scala
new file mode 100644
index 0000000000..6c3556a2ee
--- /dev/null
+++ b/resource-managers/yarn/src/main/scala/org/apache/spark/launcher/YarnCommandBuilderUtils.scala
@@ -0,0 +1,53 @@
+/*
+ * 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.launcher
+
+import scala.collection.JavaConverters._
+import scala.collection.mutable.ListBuffer
+import scala.util.Properties
+
+/**
+ * Exposes methods from the launcher library that are used by the YARN backend.
+ */
+private[spark] object YarnCommandBuilderUtils {
+
+  def quoteForBatchScript(arg: String): String = {
+    CommandBuilderUtils.quoteForBatchScript(arg)
+  }
+
+  def findJarsDir(sparkHome: String): String = {
+    val scalaVer = Properties.versionNumberString
+      .split("\\.")
+      .take(2)
+      .mkString(".")
+    CommandBuilderUtils.findJarsDir(sparkHome, scalaVer, true)
+  }
+
+  /**
+   * Adds the perm gen configuration to the list of java options if needed and not yet added.
+   *
+   * Note that this method adds the option based on the local JVM version; if the node where
+   * the container is running has a different Java version, there's a risk that the option will
+   * not be added (e.g. if the AM is running Java 8 but the container's node is set up to use
+   * Java 7).
+   */
+  def addPermGenSizeOpt(args: ListBuffer[String]): Unit = {
+    CommandBuilderUtils.addPermGenSizeOpt(args.asJava)
+  }
+
+}