| /* |
| 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.datasource |
| |
| import scala.util.Success |
| |
| import org.apache.spark.sql.SparkSession |
| import org.apache.spark.streaming.StreamingContext |
| |
| import org.apache.griffin.measure.Loggable |
| import org.apache.griffin.measure.configuration.dqdefinition.DataSourceParam |
| import org.apache.griffin.measure.datasource.cache.StreamingCacheClientFactory |
| import org.apache.griffin.measure.datasource.connector.{DataConnector, DataConnectorFactory} |
| |
| |
| object DataSourceFactory extends Loggable { |
| |
| def getDataSources(sparkSession: SparkSession, |
| ssc: StreamingContext, |
| dataSources: Seq[DataSourceParam] |
| ): Seq[DataSource] = { |
| dataSources.zipWithIndex.flatMap { pair => |
| val (param, index) = pair |
| getDataSource(sparkSession, ssc, param, index) |
| } |
| } |
| |
| private def getDataSource(sparkSession: SparkSession, |
| ssc: StreamingContext, |
| dataSourceParam: DataSourceParam, |
| index: Int |
| ): Option[DataSource] = { |
| val name = dataSourceParam.getName |
| val connectorParams = dataSourceParam.getConnectors |
| val timestampStorage = TimestampStorage() |
| |
| // for streaming data cache |
| val streamingCacheClientOpt = StreamingCacheClientFactory.getClientOpt( |
| sparkSession.sqlContext, dataSourceParam.getCheckpointOpt, name, index, timestampStorage) |
| |
| val dataConnectors: Seq[DataConnector] = connectorParams.flatMap { connectorParam => |
| DataConnectorFactory.getDataConnector(sparkSession, ssc, connectorParam, |
| timestampStorage, streamingCacheClientOpt) match { |
| case Success(connector) => Some(connector) |
| case _ => None |
| } |
| } |
| |
| Some(DataSource(name, dataSourceParam, dataConnectors, streamingCacheClientOpt)) |
| } |
| |
| } |