| /* |
| * 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.wayang.profiler.spark; |
| |
| import java.io.BufferedWriter; |
| import java.io.IOException; |
| import java.io.OutputStreamWriter; |
| import java.util.function.Supplier; |
| import org.apache.wayang.core.api.Configuration; |
| import org.apache.wayang.core.api.exception.WayangException; |
| import org.apache.wayang.core.util.fs.FileSystem; |
| import org.apache.wayang.core.util.fs.FileSystems; |
| import org.apache.wayang.spark.operators.SparkTextFileSource; |
| |
| /** |
| * {@link SparkOperatorProfiler} for the {@link SparkTextFileSource}. |
| */ |
| public class SparkTextFileSourceProfiler extends SparkSourceProfiler { |
| |
| private final String fileUrl; |
| |
| public SparkTextFileSourceProfiler(Configuration configuration, |
| Supplier<?> dataQuantumGenerator) { |
| this(configuration.getStringProperty("wayang.profiler.datagen.url"), configuration, dataQuantumGenerator); |
| } |
| |
| private SparkTextFileSourceProfiler(String fileUrl, |
| Configuration configuration, |
| Supplier<?> dataQuantumGenerator) { |
| super(() -> new SparkTextFileSource(fileUrl), configuration, dataQuantumGenerator); |
| this.fileUrl = fileUrl; |
| } |
| |
| @Override |
| protected void prepareInput(int inputIndex, long inputCardinality) { |
| assert inputIndex == 0; |
| |
| // Obtain access to the file system. |
| final FileSystem fileSystem = FileSystems.getFileSystem(this.fileUrl).orElseThrow( |
| () -> new WayangException(String.format("File system of %s not supported.", this.fileUrl)) |
| ); |
| |
| // Try to delete any existing file. |
| try { |
| if (!fileSystem.delete(this.fileUrl, true)) { |
| this.logger.warn("Could not delete {}.", this.fileUrl); |
| } |
| } catch (IOException e) { |
| this.logger.error(String.format("Deleting %s failed.", this.fileUrl), e); |
| } |
| |
| // Generate and write the test data. |
| try (BufferedWriter writer = new BufferedWriter( |
| new OutputStreamWriter( |
| fileSystem.create(this.fileUrl), |
| "UTF-8" |
| ) |
| )) { |
| final Supplier<?> supplier = this.dataQuantumGenerators.get(0); |
| for (long i = 0; i < inputCardinality; i++) { |
| writer.write(supplier.get().toString()); |
| writer.write('\n'); |
| } |
| } catch (Exception e) { |
| throw new WayangException(String.format("Could not write test data to %s.", this.fileUrl), e); |
| } |
| } |
| |
| @Override |
| public void cleanUp() { |
| super.cleanUp(); |
| |
| FileSystems.getFileSystem(this.fileUrl).ifPresent(fs -> { |
| try { |
| fs.delete(this.fileUrl, true); |
| } catch (IOException e) { |
| this.logger.error(String.format("Could not delete profiling file %s.", this.fileUrl), e); |
| } |
| } |
| ); |
| } |
| } |