| /* |
| * 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.carbondata.view |
| |
| import java.util |
| |
| import scala.collection.JavaConverters._ |
| |
| import org.apache.spark.sql.{CarbonEnv, CarbonUtils, SparkSession} |
| |
| import org.apache.carbondata.core.constants.CarbonCommonConstants |
| import org.apache.carbondata.core.metadata.schema.table.CarbonTable |
| import org.apache.carbondata.core.view.{MVCatalog, MVCatalogFactory, MVManager, MVSchema, MVStatus} |
| |
| class MVManagerInSpark(session: SparkSession) extends MVManager { |
| override def getDatabases: util.List[String] = { |
| CarbonUtils.threadSet(CarbonCommonConstants.CARBON_ENABLE_MV, "true") |
| try { |
| val databaseList = session.catalog.listDatabases() |
| val databaseNameList = new util.ArrayList[String]() |
| for (database <- databaseList.collect()) { |
| databaseNameList.add(database.name) |
| } |
| databaseNameList |
| } finally { |
| CarbonUtils.threadUnset(CarbonCommonConstants.CARBON_ENABLE_MV) |
| } |
| } |
| |
| override def getDatabaseLocation(databaseName: String): String = { |
| CarbonEnv.getDatabaseLocation(databaseName, session) |
| } |
| } |
| |
| object MVManagerInSpark { |
| |
| private var viewManager: MVManagerInSpark = null |
| |
| // returns single MVManager instance for all the current sessions. |
| def get(session: SparkSession): MVManagerInSpark = { |
| if (viewManager == null) { |
| this.synchronized { |
| if (viewManager == null) { |
| viewManager = new MVManagerInSpark(session) |
| } |
| } |
| } |
| viewManager |
| } |
| |
| def disableMVOnTable(sparkSession: SparkSession, |
| carbonTable: CarbonTable, |
| isOverwriteTable: Boolean = false): Unit = { |
| if (carbonTable == null) { |
| return |
| } |
| val viewManager = MVManagerInSpark.get(sparkSession) |
| val viewSchemas = new util.ArrayList[MVSchema]() |
| for (viewSchema <- viewManager.getSchemasOnTable(carbonTable).asScala) { |
| if (viewSchema.isRefreshOnManual) { |
| viewSchemas.add(viewSchema) |
| } |
| } |
| viewManager.setStatus(viewSchemas, MVStatus.DISABLED) |
| if (isOverwriteTable) { |
| if (!viewSchemas.isEmpty) { |
| viewManager.onTruncate(viewSchemas) |
| } |
| } |
| } |
| |
| /** |
| * when first time MVCatalogs are initialized, it stores session info also, |
| * but when carbon session is newly created, catalog map will not be cleared, |
| * so if session info is different, remove the entry from map. |
| */ |
| def getOrReloadMVCatalog(sparkSession: SparkSession): MVCatalogInSpark = { |
| val catalogFactory = new MVCatalogFactory[MVSchemaWrapper] { |
| override def newCatalog(): MVCatalog[MVSchemaWrapper] = { |
| new MVCatalogInSpark(sparkSession) |
| } |
| } |
| val viewManager = MVManagerInSpark.get(sparkSession) |
| var viewCatalog = viewManager.getCatalog(catalogFactory, false).asInstanceOf[MVCatalogInSpark] |
| if (!viewCatalog.session.equals(sparkSession)) { |
| viewCatalog = viewManager.getCatalog(catalogFactory, true).asInstanceOf[MVCatalogInSpark] |
| } |
| viewCatalog |
| } |
| } |