| /* |
| * 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.griffin.measure.context |
| |
| import scala.collection.mutable |
| |
| import org.apache.spark.sql.DataFrame |
| |
| import org.apache.griffin.measure.Loggable |
| |
| /** |
| * cache and unpersist dataframes |
| */ |
| case class DataFrameCache() extends Loggable { |
| |
| val dataFrames: mutable.Map[String, DataFrame] = mutable.Map() |
| val trashDataFrames: mutable.MutableList[DataFrame] = mutable.MutableList() |
| |
| private def trashDataFrame(df: DataFrame): Unit = { |
| trashDataFrames += df |
| } |
| private def trashDataFrames(dfs: Seq[DataFrame]): Unit = { |
| trashDataFrames ++= dfs |
| } |
| |
| def cacheDataFrame(name: String, df: DataFrame): Unit = { |
| info(s"try to cache data frame $name") |
| dataFrames.get(name) match { |
| case Some(odf) => |
| trashDataFrame(odf) |
| dataFrames += (name -> df) |
| df.cache |
| info("cache after replace old df") |
| case _ => |
| dataFrames += (name -> df) |
| df.cache |
| info("cache after replace no old df") |
| } |
| } |
| |
| def uncacheDataFrame(name: String): Unit = { |
| dataFrames.get(name).foreach(df => trashDataFrame(df)) |
| dataFrames -= name |
| } |
| def uncacheAllDataFrames(): Unit = { |
| trashDataFrames(dataFrames.values.toSeq) |
| dataFrames.clear |
| } |
| |
| def clearAllTrashDataFrames(): Unit = { |
| trashDataFrames.foreach(_.unpersist) |
| trashDataFrames.clear |
| } |
| |
| } |