| /* |
| * 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.client.socket |
| |
| import org.apache.pekko.actor.{ActorRef, Actor} |
| import org.apache.pekko.util.{ByteString, Timeout} |
| import org.apache.toree.communication.ZMQMessage |
| import org.apache.pekko.pattern.ask |
| import org.apache.toree.kernel.protocol.v5.client.ActorLoader |
| import org.apache.toree.utils.LogLike |
| import org.apache.toree.kernel.protocol.v5.UUID |
| import scala.collection.concurrent.{Map, TrieMap} |
| import scala.concurrent.duration._ |
| |
| object HeartbeatMessage {} |
| /** |
| * The client endpoint for heartbeat messages specified in the IPython Kernel |
| * Spec. |
| * |
| * @param socketFactory A factory to create the ZeroMQ socket connection |
| * @param actorLoader The loader used to retrieve actors |
| * @param signatureEnabled Whether or not to check and provide signatures |
| */ |
| class HeartbeatClient( |
| socketFactory : SocketFactory, |
| actorLoader: ActorLoader, |
| signatureEnabled: Boolean |
| ) extends Actor with LogLike { |
| logger.debug("Created new Heartbeat Client actor") |
| implicit val timeout = Timeout(1.minute) |
| |
| val futureMap: Map[UUID, ActorRef] = TrieMap[UUID, ActorRef]() |
| val socket = socketFactory.HeartbeatClient(context.system, self) |
| |
| override def receive: Receive = { |
| // from Heartbeat |
| case message: ZMQMessage => |
| val id = message.frames.map((byteString: ByteString) => |
| new String(byteString.toArray)).mkString("\n") |
| logger.info(s"Heartbeat client receive:$id") |
| futureMap(id) ! true |
| futureMap.remove(id) |
| |
| // from SparkKernelClient |
| case HeartbeatMessage => |
| import scala.concurrent.ExecutionContext.Implicits.global |
| val id = java.util.UUID.randomUUID().toString |
| futureMap += (id -> sender) |
| logger.info(s"Heartbeat client send: $id") |
| val future = socket ? ZMQMessage(ByteString(id.getBytes)) |
| future.onComplete { |
| // future always times out because server "tells" response { |
| case(_) => futureMap.remove(id) |
| } |
| } |
| } |