| /* |
| * 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.sql |
| |
| import org.apache.commons.lang3.StringUtils |
| |
| import org.apache.carbondata.streaming.CarbonStreamException |
| import org.apache.carbondata.streaming.CarbonStreamSparkStreaming |
| import org.apache.carbondata.streaming.CarbonStreamSparkStreamingWriter |
| |
| /** |
| * Create [[CarbonStreamSparkStreamingWriter]] for stream table |
| * when integrate with Spark Streaming. |
| * |
| * NOTE: Current integration with Spark Streaming is an alpha feature. |
| */ |
| object CarbonSparkStreamingFactory { |
| |
| def getStreamSparkStreamingWriter(spark: SparkSession, |
| dbNameStr: String, |
| tableName: String): CarbonStreamSparkStreamingWriter = |
| synchronized { |
| val dbName = if (StringUtils.isEmpty(dbNameStr)) "default" else dbNameStr |
| val key = dbName + "." + tableName |
| if (CarbonStreamSparkStreaming.getTableMap.containsKey(key)) { |
| CarbonStreamSparkStreaming.getTableMap.get(key) |
| } else { |
| if (StringUtils.isEmpty(tableName) || tableName.contains(" ")) { |
| throw new CarbonStreamException("Table creation failed. " + |
| "Table name must not be blank or " + |
| "cannot contain blank space") |
| } |
| val carbonTable = CarbonEnv.getCarbonTable(Some(dbName), |
| tableName)(spark) |
| if (!carbonTable.isStreamingSink) { |
| throw new CarbonStreamException(s"Table ${carbonTable.getDatabaseName}." + |
| s"${carbonTable.getTableName} is not a streaming table") |
| } |
| val streamWriter = new CarbonStreamSparkStreamingWriter(spark, |
| carbonTable, spark.sessionState.newHadoopConf()) |
| CarbonStreamSparkStreaming.getTableMap.put(key, streamWriter) |
| streamWriter |
| } |
| } |
| } |