com.datamountaineer.streamreactor.connect.druid.config.DruidSinkSettings.scala Maven / Gradle / Ivy
/*
* Copyright 2017 Datamountaineer.
*
* Licensed 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 com.datamountaineer.streamreactor.connect.druid.config
import java.io.File
import com.datamountaineer.streamreactor.connect.schemas.StructFieldsExtractor
import org.apache.kafka.common.config.ConfigException
import scala.collection.JavaConversions._
case class DruidSinkSettings(datasourceNames: Map[String,String],
tranquilityConfig: String,
extractors: Map[String, StructFieldsExtractor]
)
object DruidSinkSettings {
/**
* Creates an instance of DruidSinkSettings from a DruidSinkConfig
*
* @param config : The map of all provided configurations
* @return An instance of DruidSinkSettings
*/
def apply(config: DruidConfig): DruidSinkSettings = {
val file = config.getString(DruidSinkConfigConstants.CONFIG_FILE)
if (file.trim.length == 0 || !new File(file).exists()) {
throw new ConfigException(s"${DruidSinkConfigConstants.CONFIG_FILE} is not set correctly.")
}
val fileContents = scala.io.Source.fromFile(file).mkString
if (fileContents.isEmpty) {
throw new ConfigException(s"Empty ${DruidSinkConfigConstants.CONFIG_FILE}.")
}
val kcql = config.getKCQL
val dataSources = config.getTableTopic()
val fields = config.getFieldsMap(kcql)
val extractors = kcql.map(r => {
val ignore = if (r.getIgnoredFields.nonEmpty) true else false
(r.getSource, StructFieldsExtractor(ignore, fields(r.getSource)))
}).toMap
DruidSinkSettings(dataSources, scala.io.Source.fromFile(file).mkString, extractors)
}
}