-

example-spark/etc/logback.xml

@@ -0,0 +1,19 @@
+<configuration>
+
+	<contextListener class="ch.qos.logback.classic.jul.LevelChangePropagator"/>
+
+	<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+		<layout class="ch.qos.logback.classic.PatternLayout">
+			<Pattern>
+				%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{36} - %msg%n
+			</Pattern>
+		</layout>
+	</appender>
+
+	<logger name="org.apache.spark" level="ERROR" />
+
+	<root level="ERROR">
+		<appender-ref ref="STDOUT"/>
+	</root>
+
+</configuration>

example-spark/project.scala

@@ -4,9 +4,15 @@
 // these java params are needed for spark to work with jdk 21
 //> using javaOpt --add-opens java.base/java.lang=ALL-UNNAMED --add-opens java.base/sun.nio.ch=ALL-UNNAMED --add-opens java.base/sun.util.calendar=ALL-UNNAMED --add-opens java.base/sun.security.action=ALL-UNNAMED --add-opens java.base/java.io=ALL-UNNAMED
 
+// configure logback
+//> using javaOpt -Dlogback.configurationFile=file:etc/logback.xml
+
+// terminal21 dependencies
 //> using dep io.github.kostaskougios::terminal21-ui-std:0.11
 //> using dep io.github.kostaskougios::terminal21-spark:0.11
 //> using dep io.github.kostaskougios::terminal21-nivo:0.11
 //> using dep io.github.kostaskougios::terminal21-mathjax:0.11
 
+//> using dep ch.qos.logback:logback-classic:1.4.14
+
 //> using file model

example-spark/spark-notebook.sc

@@ -8,7 +8,8 @@
  * on each restart of the script. We can force re-evaluation by clicking the "Recalculate" buttons in the UI.
  */
 
-import org.apache.spark.sql.{Dataset, SparkSession}
+// We need these imports
+import org.apache.spark.sql.*
 import org.terminal21.client.components.*
 import org.terminal21.client.components.chakra.*
 import org.terminal21.client.components.nivo.*
@@ -20,7 +21,7 @@ import scala.util.Random
 import SparkNotebook.*
 import org.terminal21.client.components.mathjax.{MathJax, MathJaxLib}
 
-SparkSessions.newTerminal21WithSparkSession(SparkSessions.newSparkSession(), "spark-notebook", "Spark Notebook", NivoLib, MathJaxLib): (spark, session) =>
+SparkSessions.newTerminal21WithSparkSession(SparkSessions.newSparkSession(/* configure your spark session here */), "spark-notebook", "Spark Notebook", NivoLib, MathJaxLib): (spark, session) =>
   given ConnectedSession = session
   given SparkSession     = spark
   import scala3encoders.given