| /* |
| * 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.core.profiling; |
| |
| import java.io.BufferedWriter; |
| import java.io.File; |
| import java.io.FileNotFoundException; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.OutputStreamWriter; |
| import java.io.UnsupportedEncodingException; |
| import java.nio.charset.Charset; |
| import java.nio.file.Files; |
| import java.nio.file.Paths; |
| import java.util.stream.Stream; |
| import org.apache.commons.io.IOUtils; |
| import org.apache.logging.log4j.LogManager; |
| import org.apache.logging.log4j.Logger; |
| import org.apache.wayang.core.api.Configuration; |
| import org.apache.wayang.core.api.exception.WayangException; |
| import org.apache.wayang.core.platform.CrossPlatformExecutor; |
| import org.apache.wayang.core.platform.PartialExecution; |
| import org.apache.wayang.core.util.JsonSerializables; |
| import org.apache.wayang.core.util.JsonSerializer; |
| import org.apache.wayang.core.util.json.JSONObject; |
| |
| /** |
| * Stores execution data have been collected by the {@link CrossPlatformExecutor}. |
| * The current version uses JSON as serialization format. |
| */ |
| public class ExecutionLog implements AutoCloseable { |
| |
| private final Logger logger = LogManager.getLogger(this.getClass()); |
| |
| /** |
| * Path to the repository file. |
| */ |
| private final String repositoryPath; |
| |
| /** |
| * {@link Configuration} to use. |
| */ |
| private final Configuration configuration; |
| |
| /** |
| * Created on demand an can be closed as well. |
| */ |
| private BufferedWriter writer; |
| |
| private ExecutionLog(Configuration configuration, String repositoryPath) { |
| this.configuration = configuration; |
| this.repositoryPath = repositoryPath; |
| this.logger.info("Curating execution log at {}.", repositoryPath); |
| } |
| |
| /** |
| * Opens an instance according to the {@link Configuration}. |
| * |
| * @param configuration describes the instance to be opened |
| * @return the new instance |
| */ |
| public static ExecutionLog open(Configuration configuration) { |
| return open(configuration, configuration.getStringProperty("wayang.core.log.executions")); |
| } |
| |
| |
| /** |
| * Opens an instance. |
| * |
| * @param configuration describes the instance to be opened |
| * @param repositoryPath location of the instance |
| * @return the new instance |
| */ |
| public static ExecutionLog open(Configuration configuration, String repositoryPath) { |
| return new ExecutionLog(configuration, repositoryPath); |
| } |
| |
| /** |
| * Stores the given {@link PartialExecution}s in this instance. |
| * |
| * @param partialExecutions that should be stored |
| */ |
| public void storeAll(Iterable<PartialExecution> partialExecutions) throws IOException { |
| final PartialExecution.Serializer serializer = new PartialExecution.Serializer(this.configuration); |
| for (PartialExecution partialExecution : partialExecutions) { |
| this.store(partialExecution, serializer); |
| } |
| } |
| |
| /** |
| * Stores the given {@link PartialExecution} in this instance. |
| * |
| * @param partialExecution that should be stored |
| */ |
| public void store(PartialExecution partialExecution) throws IOException { |
| this.store(partialExecution, new PartialExecution.Serializer(this.configuration)); |
| } |
| |
| /** |
| * Stores the given {@link PartialExecution} in this instance. |
| * |
| * @param partialExecution that should be stored |
| * @param partialExecutionJsonSerializer serializes {@link PartialExecution}s |
| */ |
| private void store(PartialExecution partialExecution, JsonSerializer<PartialExecution> partialExecutionJsonSerializer) |
| throws IOException { |
| this.write(JsonSerializables.serialize(partialExecution, false, partialExecutionJsonSerializer)); |
| } |
| |
| /** |
| * Writes the measuremnt to the {@link #repositoryPath}. |
| */ |
| private void write(JSONObject jsonMeasurement) throws IOException { |
| jsonMeasurement.write(this.getWriter()); |
| writer.write('\n'); |
| } |
| |
| /** |
| * Streams the contents of this instance. |
| * |
| * @return a {@link Stream} of the contained {@link PartialExecution}s |
| * @throws IOException |
| */ |
| public Stream<PartialExecution> stream() throws IOException { |
| IOUtils.closeQuietly(this.writer); |
| this.writer = null; |
| final PartialExecution.Serializer serializer = new PartialExecution.Serializer(this.configuration); |
| return Files.lines(Paths.get(this.repositoryPath), Charset.forName("UTF-8")) |
| .map(line -> { |
| try { |
| return JsonSerializables.deserialize(new JSONObject(line), serializer, PartialExecution.class); |
| } catch (Exception e) { |
| throw new WayangException(String.format("Could not parse \"%s\".", line), e); |
| } |
| }); |
| } |
| |
| /** |
| * Initializes the {@link #writer} if it does not exist currently. |
| * |
| * @return the {@link #writer} |
| */ |
| private BufferedWriter getWriter() throws FileNotFoundException, UnsupportedEncodingException { |
| if (this.writer != null) { |
| return this.writer; |
| } |
| |
| try { |
| File file = new File(this.repositoryPath); |
| final File parentFile = file.getParentFile(); |
| if (!parentFile.exists() && !file.getParentFile().mkdirs()) { |
| throw new WayangException("Could not initialize cardinality repository."); |
| } |
| return this.writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file, true), "UTF-8")); |
| } catch (WayangException e) { |
| throw e; |
| } catch (Exception e) { |
| throw new WayangException(String.format("Cannot write to %s.", this.repositoryPath), e); |
| } |
| } |
| |
| @Override |
| public void close() throws Exception { |
| IOUtils.closeQuietly(this.writer); |
| } |
| } |