Github user tnachen commented on a diff in the pull request:
https://github.com/apache/spark/pull/5144#discussion_r27702597
--- Diff:
core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/LaunchedDrivers.scala
---
@@ -0,0 +1,73 @@
+/*
+ * 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.scheduler.cluster.mesos
+
+import scala.collection.mutable
+import org.apache.mesos.Protos.SlaveID
+
+/**
+ * Tracks all the launched or running drivers in the Mesos cluster
scheduler.
+ * @param state Persistence engine to store tasks state.
+ */
+private[mesos] class LaunchedDrivers(state: MesosClusterPersistenceEngine)
{
+ private val drivers = new mutable.HashMap[String, MesosClusterTaskState]
+
+ // Holds the list of tasks that needs to reconciliation from the master.
+ // All states that are loaded after failover are added here.
+ val pendingRecover = new mutable.HashMap[String, SlaveID]
+
+ initialize()
+
+ def initialize(): Unit = {
+ state.fetchAll[MesosClusterTaskState]().foreach { case state =>
+ drivers(state.taskId.getValue) = state
+ pendingRecover(state.taskId.getValue) = state.slaveId
+ }
+ }
+
+ def size: Int = drivers.size
+
+ def get(submissionId: String): MesosClusterTaskState =
drivers(submissionId)
+
+ def states: Iterable[MesosClusterTaskState] = {
+ drivers.values.map(_.copy()).toList
+ }
+
+ def contains(submissionId: String): Boolean =
drivers.contains(submissionId)
+
+ def remove(submissionId: String): Option[MesosClusterTaskState] = {
+ if (pendingRecover.contains(submissionId)) {
--- End diff --
Yes you're right, my scala needs more work!
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