Github user squito commented on a diff in the pull request: https://github.com/apache/spark/pull/4216#discussion_r23880057 --- Diff: core/src/main/scala/org/apache/spark/deploy/rest/SubmitDriverRequest.scala --- @@ -0,0 +1,146 @@ +/* + * 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.spark.deploy.rest + +import scala.collection.mutable +import scala.collection.mutable.ArrayBuffer + +import com.fasterxml.jackson.annotation.{JsonIgnore, JsonProperty} +import org.json4s.jackson.JsonMethods._ + +import org.apache.spark.util.JsonProtocol + +/** + * A request to submit a driver in the REST application submission protocol. + */ +class SubmitDriverRequest extends SubmitRestProtocolRequest { + private val appName = new SubmitRestProtocolField[String]("appName") + private val appResource = new SubmitRestProtocolField[String]("appResource") + private val mainClass = new SubmitRestProtocolField[String]("mainClass") + private val jars = new SubmitRestProtocolField[String]("jars") + private val files = new SubmitRestProtocolField[String]("files") + private val pyFiles = new SubmitRestProtocolField[String]("pyFiles") + private val driverMemory = new SubmitRestProtocolField[String]("driverMemory") + private val driverCores = new SubmitRestProtocolField[Int]("driverCores") + private val driverExtraJavaOptions = new SubmitRestProtocolField[String]("driverExtraJavaOptions") + private val driverExtraClassPath = new SubmitRestProtocolField[String]("driverExtraClassPath") + private val driverExtraLibraryPath = new SubmitRestProtocolField[String]("driverExtraLibraryPath") + private val superviseDriver = new SubmitRestProtocolField[Boolean]("superviseDriver") + private val executorMemory = new SubmitRestProtocolField[String]("executorMemory") + private val totalExecutorCores = new SubmitRestProtocolField[Int]("totalExecutorCores") + + // Special fields + private val appArgs = new ArrayBuffer[String] + private val sparkProperties = new mutable.HashMap[String, String] + private val envVars = new mutable.HashMap[String, String] + + def getAppName: String = appName.toString + def getAppResource: String = appResource.toString + def getMainClass: String = mainClass.toString + def getJars: String = jars.toString + def getFiles: String = files.toString + def getPyFiles: String = pyFiles.toString + def getDriverMemory: String = driverMemory.toString + def getDriverCores: String = driverCores.toString + def getDriverExtraJavaOptions: String = driverExtraJavaOptions.toString + def getDriverExtraClassPath: String = driverExtraClassPath.toString + def getDriverExtraLibraryPath: String = driverExtraLibraryPath.toString + def getSuperviseDriver: String = superviseDriver.toString + def getExecutorMemory: String = executorMemory.toString + def getTotalExecutorCores: String = totalExecutorCores.toString + + // Special getters required for JSON serialization + @JsonProperty("appArgs") + private def getAppArgsJson: String = arrayToJson(getAppArgs) --- End diff -- I think you're still doing a lot more work to futz with the json than you to. I dug into a little bit, and I think the problem is that the json4s wrapper around jackson is lacking a lot of features. And to use jackson well, you need to add in the [scala module](http://search.maven.org/#artifactdetails%7Ccom.fasterxml.jackson.module%7Cjackson-module-scala_2.10%7C2.3.1%7Cbundle) (or just define these simple bean classes in java). Eg.: ``` class FooBar{ var blah: String = _ var ooga: Array[String] = _ var wakka: Map[String,String] = _ } val f = new FooBar f.blah = "hi" f.ooga = Array("flim", "flam", "floop") f.wakka = Map("bip" -> "bop", "beep" -> "boop") val mapper = new ObjectMapper() mapper.registerModule(com.fasterxml.jackson.module.scala.DefaultScalaModule) println(mapper.writeValueAsString(f)) ``` prints out `{"blah":"hi","ooga":["flim","flam","floop"],"wakka":{"bip":"bop","beep":"boop"}}` (it throws an exception w/out the scala module)
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