| /* |
| 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 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): Boolean = { |
| getDataSourceCacheUpdateDf(context) match { |
| case Some(df) => |
| context.dataSources |
| .find(ds => StringUtils.equals(ds.name, dsName)) |
| .foreach(_.updateData(df)) |
| case _ => |
| warn(s"update ${dsName} from ${inputName} fails") |
| } |
| true |
| } |
| |
| private def getDataFrame(context: DQContext, name: String): Option[DataFrame] = { |
| try { |
| val df = context.sqlContext.table(s"`${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) |
| |
| } |