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Diffstat (limited to 'core/src/main/scala/org/apache/spark/scheduler/cluster/TaskSetManager.scala')
-rw-r--r-- | core/src/main/scala/org/apache/spark/scheduler/cluster/TaskSetManager.scala | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/TaskSetManager.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/TaskSetManager.scala new file mode 100644 index 0000000000..648a3ef922 --- /dev/null +++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/TaskSetManager.scala @@ -0,0 +1,51 @@ +/* + * 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 + +import java.nio.ByteBuffer + +import org.apache.spark.TaskState.TaskState +import org.apache.spark.scheduler.TaskSet + +/** + * Tracks and schedules the tasks within a single TaskSet. This class keeps track of the status of + * each task and is responsible for retries on failure and locality. The main interfaces to it + * are resourceOffer, which asks the TaskSet whether it wants to run a task on one node, and + * statusUpdate, which tells it that one of its tasks changed state (e.g. finished). + * + * THREADING: This class is designed to only be called from code with a lock on the TaskScheduler + * (e.g. its event handlers). It should not be called from other threads. + */ +private[spark] trait TaskSetManager extends Schedulable { + def schedulableQueue = null + + def schedulingMode = SchedulingMode.NONE + + def taskSet: TaskSet + + def resourceOffer( + execId: String, + host: String, + availableCpus: Int, + maxLocality: TaskLocality.TaskLocality) + : Option[TaskDescription] + + def statusUpdate(tid: Long, state: TaskState, serializedData: ByteBuffer) + + def error(message: String) +} |