vicennial commented on code in PR #40368:

@@ -0,0 +1,159 @@
+ * 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
+ *
+ *
+ *
+ * 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.connect.artifact
+import{URL, URLClassLoader}
+import java.nio.file.{Files, Path, Paths, StandardCopyOption}
+import java.util.concurrent.CopyOnWriteArrayList
+import scala.collection.JavaConverters._
+import org.apache.spark.{SparkContext, SparkEnv}
+import org.apache.spark.sql.SparkSession
+import org.apache.spark.util.Utils
+ * The Artifact Manager for the [[SparkConnectService]].
+ *
+ * This class handles the storage of artifacts as well as preparing the 
artifacts for use.
+ * Currently, jars and classfile artifacts undergo additional processing:
+ *   - Jars are automatically added to the underlying [[SparkContext]] and are 
accessible by all
+ *     users of the cluster.
+ *   - Class files are moved into a common directory that is shared among all 
users of the
+ *     cluster. Note: Under a multi-user setup, class file conflicts may occur 
between user
+ *     classes as the class file directory is shared.
+ */
+class SparkConnectArtifactManager private[connect] {
+  // The base directory where all artifacts are stored.
+  // Note: If a REPL is attached to the cluster, class file artifacts are 
stored in the
+  // REPL's output directory.
+  private[connect] lazy val artifactRootPath = SparkContext.getActive match {

Review Comment:
   Hmm, `SparkConnectPlanner` callsites can pass this in via the `session` but 
it gets awkward in `SparkConnectAddArtifactsHandler` where we'll need to 
create/obtain the active Artifact Manager via a SparkSession lookup from the 

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