Jupyter Spark monitor

Makefile

@@ -103,14 +103,23 @@ dev-binder: .binder-image
 		--workdir /home/main/notebooks $(BINDER_IMAGE) \
 		/home/main/start-notebook.sh --ip=0.0.0.0
 
+SPARK_MONITOR_JAR:=toree-spark-monitor-plugin-assembly-$(VERSION)$(SNAPSHOT).jar
+
 target/scala-$(SCALA_VERSION)/$(ASSEMBLY_JAR): VM_WORKDIR=/src/toree-kernel
 target/scala-$(SCALA_VERSION)/$(ASSEMBLY_JAR): ${shell find ./*/src/main/**/*}
 target/scala-$(SCALA_VERSION)/$(ASSEMBLY_JAR): ${shell find ./*/build.sbt}
 target/scala-$(SCALA_VERSION)/$(ASSEMBLY_JAR): ${shell find ./project/*.scala} ${shell find ./project/*.sbt}
 target/scala-$(SCALA_VERSION)/$(ASSEMBLY_JAR): dist/toree-legal project/build.properties build.sbt
 	$(call RUN,$(ENV_OPTS) sbt root/assembly)
 
-build: target/scala-$(SCALA_VERSION)/$(ASSEMBLY_JAR)
+spark-monitor-plugin/target/scala-$(SCALA_VERSION)/$(SPARK_MONITOR_JAR): VM_WORKDIR=/src/toree-kernel
+spark-monitor-plugin/target/scala-$(SCALA_VERSION)/$(SPARK_MONITOR_JAR): ${shell find ./spark-monitor-plugin/src/main/**/*}
+spark-monitor-plugin/target/scala-$(SCALA_VERSION)/$(SPARK_MONITOR_JAR): spark-monitor-plugin/build.sbt
+spark-monitor-plugin/target/scala-$(SCALA_VERSION)/$(SPARK_MONITOR_JAR): ${shell find ./project/*.scala} ${shell find ./project/*.sbt}
+spark-monitor-plugin/target/scala-$(SCALA_VERSION)/$(SPARK_MONITOR_JAR): project/build.properties build.sbt
+	$(call RUN,$(ENV_OPTS) sbt sparkMonitorPlugin/assembly)
+
+build: target/scala-$(SCALA_VERSION)/$(ASSEMBLY_JAR) spark-monitor-plugin/target/scala-$(SCALA_VERSION)/$(SPARK_MONITOR_JAR)
 
 test: VM_WORKDIR=/src/toree-kernel
 test:
@@ -119,9 +128,10 @@ test:
 sbt-%:
 	$(call RUN,$(ENV_OPTS) sbt $(subst sbt-,,$@) )
 
-dist/toree/lib: target/scala-$(SCALA_VERSION)/$(ASSEMBLY_JAR)
+dist/toree/lib: target/scala-$(SCALA_VERSION)/$(ASSEMBLY_JAR) spark-monitor-plugin/target/scala-$(SCALA_VERSION)/$(SPARK_MONITOR_JAR)
 	@mkdir -p dist/toree/lib
 	@cp target/scala-$(SCALA_VERSION)/$(ASSEMBLY_JAR) dist/toree/lib/.
+	@cp spark-monitor-plugin/target/scala-$(SCALA_VERSION)/$(SPARK_MONITOR_JAR) dist/toree/lib/.
 
 dist/toree/bin: ${shell find ./etc/bin/*}
 	@mkdir -p dist/toree/bin

README.md

@@ -80,6 +80,59 @@ This results in 2 packages.
 
 NOTE: `make release` uses `docker`. Please refer to `docker` installation instructions for your system.
 
+## Building Individual Components
+
+### Main Toree Assembly
+To build just the main Toree assembly jar (without spark-monitor-plugin):
+```
+sbt assembly
+```
+This creates: `target/scala-2.12/toree-assembly-<VERSION>.jar`
+
+### Spark Monitor Plugin
+To build the spark-monitor-plugin as a separate jar:
+```
+sbt sparkMonitorPlugin/assembly
+```
+This creates: `spark-monitor-plugin/target/scala-2.12/spark-monitor-plugin-<VERSION>.jar`
+
+### Build All Components
+To compile all projects including both the main assembly and spark-monitor-plugin:
+```
+sbt compile
+```
+
+**Note**: The spark-monitor-plugin is now built as a separate jar and is not included in the main Toree assembly.
+
+## Using the Spark Monitor Plugin
+
+To enable the Spark Monitor Plugin in your Toree application, you need to specify the path to the plugin JAR when starting Toree:
+
+### Option 1: Command Line Parameter
+```bash
+# Start Toree with spark-monitor-plugin enabled
+java -jar target/scala-2.12/toree-assembly-<VERSION>.jar --magic-url file:///path/to/spark-monitor-plugin/target/scala-2.12/spark-monitor-plugin-<VERSION>.jar [other-options]
+```
+
+### Option 2: Jupyter Kernel Installation
+When installing Toree as a Jupyter kernel, you can specify the plugin:
+```bash
+jupyter toree install --spark_home=<YOUR_SPARK_PATH> --kernel_name=toree_with_monitor --toree_opts="--magic-url file:///path/to/spark-monitor-plugin-<VERSION>.jar"
+```
+
+### Option 3: Configuration File
+You can also specify the plugin in a configuration file and use the `--profile` option:
+```json
+{
+  "magic_urls": ["file:///path/to/spark-monitor-plugin-<VERSION>.jar"]
+}
+```
+Then start with: `java -jar toree-assembly.jar --profile config.json`
+
+**Important**:
+- Make sure to use the absolute path to the spark-monitor-plugin JAR file and ensure the JAR is accessible from the location where Toree is running.
+- The JAR file name does not contain "toree" prefix to avoid automatic loading as an internal plugin. This allows you to control when the SparkMonitorPlugin is enabled via the `--magic-url` parameter.
+
 Run Examples
 ============
 To play with the example notebooks, run

build.sbt

@@ -126,7 +126,7 @@ ThisBuild / credentials += Credentials(Path.userHome / ".ivy2" / ".credentials")
 lazy val root = (project in file("."))
   .settings(name := "toree")
   .aggregate(
-    macros,protocol,plugins,communication,kernelApi,client,scalaInterpreter,sqlInterpreter,kernel
+    macros,protocol,plugins,sparkMonitorPlugin,communication,kernelApi,client,scalaInterpreter,sqlInterpreter,kernel
   )
   .dependsOn(
     macros,protocol,communication,kernelApi,client,scalaInterpreter,sqlInterpreter,kernel
@@ -154,6 +154,13 @@ lazy val plugins = (project in file("plugins"))
   .settings(name := "toree-plugins")
   .dependsOn(macros)
 
+/**
+  * Project representing the SparkMonitor plugin for Toree.
+  */
+lazy val sparkMonitorPlugin = (project in file("spark-monitor-plugin"))
+  .settings(name := "toree-spark-monitor-plugin")
+  .dependsOn(macros, protocol, plugins, kernel, kernelApi)
+
 /**
   * Project representing forms of communication used as input/output for the
   * client/kernel.

plugins/build.sbt

@@ -21,7 +21,8 @@ Test / fork := true
 libraryDependencies ++= Seq(
   Dependencies.scalaReflect.value,
   Dependencies.clapper,
-  Dependencies.slf4jApi
+  Dependencies.slf4jApi,
+  Dependencies.py4j,
 )
 
 // Test dependencies

project/Dependencies.scala

@@ -84,4 +84,6 @@ object Dependencies {
     )
   }
 
+  val py4j = "net.sf.py4j" % "py4j" % "0.10.7" % "provided"
+
 }

spark-monitor-plugin/build.sbt

@@ -0,0 +1,45 @@
+/*
+ *  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
+ */
+
+Test / fork := true
+
+// Needed for SparkMonitor plugin
+libraryDependencies ++= Dependencies.sparkAll.value
+libraryDependencies ++= Seq(
+  Dependencies.playJson
+)
+
+// Test dependencies
+libraryDependencies += Dependencies.scalaCompiler.value % "test"
+
+// Assembly configuration for separate jar
+enablePlugins(AssemblyPlugin)
+
+assembly / assemblyMergeStrategy := {
+  case "module-info.class" => MergeStrategy.discard
+  case PathList("META-INF", "versions", "9", "module-info.class") => MergeStrategy.discard
+  case PathList("META-INF", xs @ _*) => MergeStrategy.discard
+  case x =>
+    val oldStrategy = (assembly / assemblyMergeStrategy).value
+    oldStrategy(x)
+}
+
+assembly / assemblyOption ~= {
+  _.withIncludeScala(false)
+}
+
+assembly / test := {}