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/*
* 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 scala.collection.mutable
import scala.collection.mutable.ArrayBuffer
/**
* A SparkListenerEvent bus that relays events to its listeners
*/
private[spark] trait SparkListenerBus {
// SparkListeners attached to this event bus
protected val sparkListeners = new ArrayBuffer[SparkListener]
with mutable.SynchronizedBuffer[SparkListener]
def addListener(listener: SparkListener) {
sparkListeners += listener
}
/**
* Post an event to all attached listeners. This does nothing if the event is
* SparkListenerShutdown.
*/
protected def postToAll(event: SparkListenerEvent) {
event match {
case stageSubmitted: SparkListenerStageSubmitted =>
sparkListeners.foreach(_.onStageSubmitted(stageSubmitted))
case stageCompleted: SparkListenerStageCompleted =>
sparkListeners.foreach(_.onStageCompleted(stageCompleted))
case jobStart: SparkListenerJobStart =>
sparkListeners.foreach(_.onJobStart(jobStart))
case jobEnd: SparkListenerJobEnd =>
sparkListeners.foreach(_.onJobEnd(jobEnd))
case taskStart: SparkListenerTaskStart =>
sparkListeners.foreach(_.onTaskStart(taskStart))
case taskGettingResult: SparkListenerTaskGettingResult =>
sparkListeners.foreach(_.onTaskGettingResult(taskGettingResult))
case taskEnd: SparkListenerTaskEnd =>
sparkListeners.foreach(_.onTaskEnd(taskEnd))
case environmentUpdate: SparkListenerEnvironmentUpdate =>
sparkListeners.foreach(_.onEnvironmentUpdate(environmentUpdate))
case blockManagerAdded: SparkListenerBlockManagerAdded =>
sparkListeners.foreach(_.onBlockManagerAdded(blockManagerAdded))
case blockManagerRemoved: SparkListenerBlockManagerRemoved =>
sparkListeners.foreach(_.onBlockManagerRemoved(blockManagerRemoved))
case unpersistRDD: SparkListenerUnpersistRDD =>
sparkListeners.foreach(_.onUnpersistRDD(unpersistRDD))
case SparkListenerShutdown =>
}
}
}
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