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From andrewor14 <>
Subject [GitHub] spark pull request: [SPARK-1132] Persisting Web UI through refacto...
Date Thu, 13 Mar 2014 20:26:55 GMT
Github user andrewor14 commented on a diff in the pull request:
    --- Diff: core/src/main/scala/org/apache/spark/scheduler/SparkReplayerBus.scala ---
    @@ -0,0 +1,97 @@
    + * 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
    + *
    + *
    + *
    + * 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.hadoop.fs.{Path, FileSystem}
    +import org.json4s.jackson.JsonMethods._
    +import org.apache.spark.{Logging, SparkConf}
    +import org.apache.spark.util.{JsonProtocol, Utils}
    + * An EventBus that replays logged events from persisted storage
    + */
    +private[spark] class SparkReplayerBus(conf: SparkConf) extends EventBus with Logging
    --- End diff --
    I think "something you can attach listeners to" pretty much means pub-sub (the difference
is how often you publish; in replay mode we publish once in the beginning). I propose the
    trait SparkListenerBus
    ReplayListenerBus extends SparkListenerBus
    LiveListenerBus / PollingListenerBus / AsynchronousListenerBus extends SparkListenerBus

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