1 files changed, 45 insertions, 0 deletions
diff --git a/core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerListener.scala b/core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerListener.scala
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+++ b/core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerListener.scala
@@ -0,0 +1,45 @@
+/*
+ * 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
+
+import org.apache.spark.scheduler.cluster.TaskInfo
+import scala.collection.mutable.Map
+
+import org.apache.spark.TaskEndReason
+import org.apache.spark.executor.TaskMetrics
+
+/**
+ * Interface for getting events back from the TaskScheduler.
+ */
+private[spark] trait TaskSchedulerListener {
+  // A task has started.
+  def taskStarted(task: Task[_], taskInfo: TaskInfo)
+
+  // A task has finished or failed.
+  def taskEnded(task: Task[_], reason: TaskEndReason, result: Any, accumUpdates: Map[Long, Any],
+                taskInfo: TaskInfo, taskMetrics: TaskMetrics): Unit
+
+  // A node was added to the cluster.
+  def executorGained(execId: String, host: String): Unit
+
+  // A node was lost from the cluster.
+  def executorLost(execId: String): Unit
+
+  // The TaskScheduler wants to abort an entire task set.
+  def taskSetFailed(taskSet: TaskSet, reason: String): Unit
+}