| /* |
| * 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.protocol.v5.interpreter |
| |
| import java.io.OutputStream |
| |
| import akka.actor.{Actor, ActorRef, Props} |
| import akka.pattern.{ask, pipe} |
| import akka.util.Timeout |
| import org.apache.toree.interpreter.Interpreter |
| import org.apache.toree.kernel.protocol.v5.KernelMessage |
| import org.apache.toree.kernel.protocol.v5.interpreter.tasks._ |
| import org.apache.toree.kernel.protocol.v5.content._ |
| import org.apache.toree.interpreter._ |
| import org.apache.toree.utils.LogLike |
| |
| import scala.concurrent.duration._ |
| |
| object InterpreterActor { |
| def props(interpreter: Interpreter): Props = |
| Props(classOf[InterpreterActor], interpreter) |
| } |
| |
| // TODO: Investigate restart sequence |
| // |
| // http://doc.akka.io/docs/akka/2.2.3/general/supervision.html |
| // |
| // "create new actor instance by invoking the originally provided factory again" |
| // |
| // Does this mean that the interpreter instance is not gc and is passed in? |
| // |
| class InterpreterActor( |
| interpreterTaskFactory: InterpreterTaskFactory |
| ) extends Actor with LogLike { |
| // NOTE: Required to provide the execution context for futures with akka |
| import context._ |
| |
| // NOTE: Required for ask (?) to function... maybe can define elsewhere? |
| implicit val timeout = Timeout(21474835.seconds) |
| |
| // |
| // List of child actors that the interpreter contains |
| // |
| private var executeRequestTask: ActorRef = _ |
| private var completeCodeTask: ActorRef = _ |
| private var isCompleteTask: ActorRef = _ |
| |
| /** |
| * Initializes all child actors performing tasks for the interpreter. |
| */ |
| override def preStart = { |
| executeRequestTask = interpreterTaskFactory.ExecuteRequestTask( |
| context, InterpreterChildActorType.ExecuteRequestTask.toString) |
| completeCodeTask = interpreterTaskFactory.CodeCompleteTask( |
| context, InterpreterChildActorType.CodeCompleteTask.toString) |
| isCompleteTask = interpreterTaskFactory.IsCompleteTask( |
| context, InterpreterChildActorType.IsCompleteTask.toString) |
| } |
| |
| override def receive: Receive = { |
| case (executeRequest: ExecuteRequest, parentMessage: KernelMessage, |
| outputStream: OutputStream) => |
| val data = (executeRequest, parentMessage, outputStream) |
| (executeRequestTask ? data) recover { |
| case ex: Throwable => |
| logger.error(s"Could not execute code ${executeRequest.code} because " |
| + s"of exception: ${ex.getMessage}") |
| Right(ExecuteError( |
| ex.getClass.getName, |
| ex.getLocalizedMessage, |
| ex.getStackTrace.map(_.toString).toList) |
| ) |
| } pipeTo sender |
| case (completeRequest: CompleteRequest) => |
| logger.debug(s"InterpreterActor requesting code completion for code " + |
| s"${completeRequest.code}") |
| (completeCodeTask ? completeRequest) recover { |
| case ex: Throwable => |
| logger.error(s"Could not complete code ${completeRequest.code}: " + |
| s"${ex.getMessage}") |
| Right(ExecuteError( |
| ex.getClass.getName, |
| ex.getLocalizedMessage, |
| ex.getStackTrace.map(_.toString).toList) |
| ) |
| } pipeTo sender |
| case (isCompleteRequest: IsCompleteRequest) => |
| logger.debug(s"InterpreterActor requesting is complete code ${isCompleteRequest.code}") |
| (isCompleteTask ? isCompleteRequest) recover { |
| case ex: Throwable => |
| logger.warn(s"Could not determine completeness for code ${isCompleteRequest.code}: " + |
| s"${ex.getMessage}") |
| Left(IsCompleteReply("unknown", "")) |
| } pipeTo sender |
| } |
| } |