spark AppHistoryServerPlugin 源码
spark AppHistoryServerPlugin 代码
文件路径：/core/src/main/scala/org/apache/spark/status/AppHistoryServerPlugin.scala
/*
* 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.status
import org.apache.spark.SparkConf
import org.apache.spark.scheduler.SparkListener
import org.apache.spark.ui.SparkUI
/**
* An interface for creating history listeners(to replay event logs) defined in other modules like
* SQL, and setup the UI of the plugin to rebuild the history UI.
*/
private[spark] trait AppHistoryServerPlugin {
/**
* Creates listeners to replay the event logs.
*/
def createListeners(conf: SparkConf, store: ElementTrackingStore): Seq[SparkListener]
/**
* Sets up UI of this plugin to rebuild the history UI.
*/
def setupUI(ui: SparkUI): Unit
/**
* The position of a plugin tab relative to the other plugin tabs in the history UI.
*/
def displayOrder: Int = Integer.MAX_VALUE
}
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