| /* |
| * 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.carbondata.examples |
| |
| import org.apache.flink.api.java.ExecutionEnvironment |
| import org.apache.hadoop.conf.Configuration |
| import org.apache.hadoop.mapreduce.Job |
| |
| import org.apache.carbondata.hadoop.CarbonProjection |
| import org.apache.carbondata.hadoop.api.CarbonTableInputFormat |
| |
| // Write carbondata file by spark and read it by flink |
| // scalastyle:off println |
| object FlinkExample { |
| |
| def main(args: Array[String]): Unit = { |
| // write carbondata file by spark |
| val cc = ExampleUtils.createCarbonSession("FlinkExample") |
| val path = ExampleUtils.writeSampleCarbonFile(cc, "carbon1") |
| |
| // read two columns by flink |
| val projection = new CarbonProjection |
| projection.addColumn("c1") // column c1 |
| projection.addColumn("c3") // column c3 |
| val conf = new Configuration() |
| CarbonTableInputFormat.setColumnProjection(conf, projection) |
| |
| val env = ExecutionEnvironment.getExecutionEnvironment |
| val ds = env.readHadoopFile( |
| new CarbonTableInputFormat[Array[Object]], |
| classOf[Void], |
| classOf[Array[Object]], |
| path, |
| new Job(conf) |
| ) |
| |
| // print result |
| val result = ds.collect() |
| for (i <- 0 until result.size()) { |
| println(result.get(i).f1.mkString(",")) |
| } |
| |
| // delete carbondata file |
| ExampleUtils.cleanSampleCarbonFile(cc, "carbon1") |
| } |
| } |
| // scalastyle:on println |