| /* |
| * 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.step.write |
| |
| import scala.util.Try |
| |
| import org.apache.commons.lang.StringUtils |
| import org.apache.spark.sql.DataFrame |
| |
| import org.apache.griffin.measure.context.DQContext |
| |
| /** |
| * update data source streaming cache |
| */ |
| case class DataSourceUpdateWriteStep(dsName: String, inputName: String) extends WriteStep { |
| |
| val name: String = "" |
| val writeTimestampOpt: Option[Long] = None |
| |
| def execute(context: DQContext): Try[Boolean] = Try { |
| getDataSourceCacheUpdateDf(context) match { |
| case Some(df) => |
| context.dataSources |
| .find(ds => StringUtils.equals(ds.name, dsName)) |
| .foreach(_.updateData(df)) |
| case _ => |
| warn(s"update $dsName from $inputName fails") |
| } |
| true |
| } |
| |
| private def getDataFrame(context: DQContext, name: String): Option[DataFrame] = { |
| try { |
| val df = context.sparkSession.table(s"`$name`") |
| Some(df) |
| } catch { |
| case e: Throwable => |
| error(s"get data frame $name fails", e) |
| None |
| } |
| } |
| |
| private def getDataSourceCacheUpdateDf(context: DQContext): Option[DataFrame] = |
| getDataFrame(context, inputName) |
| |
| } |