| /* |
| * 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.toree.kernel.interpreter.sparkr |
| |
| import org.apache.toree.interpreter.broker.BrokerProcess |
| import scala.collection.JavaConverters._ |
| |
| /** |
| * Represents the R process used to evaluate SparkR code. |
| * |
| * @param processName The name of the Rscript process to run. |
| * @param sparkRBridge The bridge to use to retrieve kernel output streams |
| * and the Spark version to be verified |
| * @param sparkRProcessHandler The handler to use when the process fails or |
| * completes |
| * @param port The port to provide to the SparkR process to use to connect |
| * back to the JVM |
| */ |
| class SparkRProcess( |
| processName: String, |
| private val sparkRBridge: SparkRBridge, |
| private val sparkRProcessHandler: SparkRProcessHandler, |
| private val port: Int |
| ) extends BrokerProcess( |
| processName = processName, |
| entryResource = "kernelR/sparkr_runner.R", |
| otherResources = Seq("kernelR/sparkr_runner_utils.R"), |
| brokerBridge = sparkRBridge, |
| brokerProcessHandler = sparkRProcessHandler, |
| arguments = Seq( |
| "--default-packages=datasets,utils,grDevices,graphics,stats,methods" |
| ) |
| ) { |
| override val brokerName: String = "SparkR" |
| private val sparkHome = Option(System.getenv("SPARK_HOME")) |
| .orElse(Option(System.getProperty("spark.home"))) |
| |
| assert(sparkHome.nonEmpty, "SparkR process requires Spark Home to be set!") |
| |
| /** |
| * Creates a new process environment to be used for environment variable |
| * retrieval by the new process. |
| * |
| * @return The map of environment variables and their respective values |
| */ |
| override protected def newProcessEnvironment(): Map[String, String] = { |
| val baseEnvironment = super.newProcessEnvironment() |
| |
| // Note: Adding the new map values should override the old ones |
| baseEnvironment ++ Map( |
| "SPARK_HOME" -> sparkHome.get, |
| "EXISTING_SPARKR_BACKEND_PORT" -> port.toString |
| ) |
| } |
| } |