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new e823afad625e [SPARK-50917][EXAMPLES] Add Pi Scala example to work both
for Connect and Classic
e823afad625e is described below
commit e823afad625e1914baf265d823d472cad183355e
Author: Kent Yao <[email protected]>
AuthorDate: Mon Feb 10 11:42:07 2025 -0800
[SPARK-50917][EXAMPLES] Add Pi Scala example to work both for Connect and
Classic
### What changes were proposed in this pull request?
This PR adds a SparkDataFramePi Scala example to work both for Connect and
Classic
### Why are the changes needed?
The SparkPi example, mostly as the first step for users to get to know
Spark, should be able to run on Spark Connect mode.
### Does this PR introduce _any_ user-facing change?
no
### How was this patch tested?
Manually build and test
```log
bin/spark-submit --remote 'sc://localhost' --class
org.apache.spark.examples.sql.SparkDataFramePi
examples/jars/spark-examples_2.13-4.1.0-SNAPSHOT.jar
WARNING: Using incubator modules: jdk.incubator.vector
25/01/23 15:00:03 INFO BaseAllocator: Debug mode disabled. Enable with the
VM option -Darrow.memory.debug.allocator=true.
25/01/23 15:00:03 INFO DefaultAllocationManagerOption: allocation manager
type not specified, using netty as the default type
25/01/23 15:00:03 INFO CheckAllocator: Using DefaultAllocationManager at
memory/netty/DefaultAllocationManagerFactory.class
Pi is roughly 3.1388756943784717
25/01/23 15:00:04 INFO ShutdownHookManager: Shutdown hook called
25/01/23 15:00:04 INFO ShutdownHookManager: Deleting directory
/private/var/folders/84/dgr9ykwn6yndcmq1kjxqvk200000gn/T/spark-25ed842e-5888-47ce-bb0b-442385d643cb
```
### Was this patch authored or co-authored using generative AI tooling?
no
Closes #49617 from yaooqinn/SPARK-50917.
Authored-by: Kent Yao <[email protected]>
Signed-off-by: Dongjoon Hyun <[email protected]>
---
.../spark/examples/sql/SparkDataFramePi.scala | 42 ++++++++++++++++++++++
1 file changed, 42 insertions(+)
diff --git
a/examples/src/main/scala/org/apache/spark/examples/sql/SparkDataFramePi.scala
b/examples/src/main/scala/org/apache/spark/examples/sql/SparkDataFramePi.scala
new file mode 100644
index 000000000000..0102b2d291e9
--- /dev/null
+++
b/examples/src/main/scala/org/apache/spark/examples/sql/SparkDataFramePi.scala
@@ -0,0 +1,42 @@
+/*
+ * 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.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.sql
+
+import org.apache.spark.sql.SparkSession
+import org.apache.spark.sql.functions._
+
+/** Computes an approximation to pi with SparkSession/DataFrame APIs */
+object SparkDataFramePi {
+ def main(args: Array[String]): Unit = {
+ val spark = SparkSession
+ .builder()
+ .appName("Spark DataFrame Pi")
+ .getOrCreate()
+ import spark.implicits._
+ val slices = if (args.length > 0) args(0).toInt else 2
+ val n = math.min(100000L * slices, Int.MaxValue).toInt // avoid overflow
+ val count = spark.range(0, n, 1, slices)
+ .select((pow(rand() * 2 - 1, lit(2)) + pow(rand() * 2 - 1,
lit(2))).as("v"))
+ .where($"v" <= 1)
+ .count()
+ println(s"Pi is roughly ${4.0 * count / (n - 1)}")
+ spark.stop()
+ }
+}
+// scalastyle:on println
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