SammyVimes commented on a change in pull request #714: URL: https://github.com/apache/ignite-3/pull/714#discussion_r829818849
########## File path: modules/network-annotation-processor/src/main/java/org/apache/ignite/internal/network/processor/IncrementalCompilationConfig.java ########## @@ -0,0 +1,176 @@ +/* + * 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.ignite.internal.network.processor; + +import static java.util.stream.Collectors.toList; + +import com.squareup.javapoet.ClassName; +import java.io.BufferedReader; +import java.io.BufferedWriter; +import java.io.FileNotFoundException; +import java.io.IOException; +import java.nio.file.NoSuchFileException; +import java.util.Arrays; +import java.util.List; +import javax.annotation.processing.Filer; +import javax.annotation.processing.ProcessingEnvironment; +import javax.tools.FileObject; +import javax.tools.StandardLocation; +import org.jetbrains.annotations.Nullable; + +/** + * Incremental configuration of the {@link TransferableObjectProcessor}. + * Holds data between (re-)compilations. + * <br> + * The serialized format of this config is as follows: + * <br> + * First line: message group class' name + * <br> + * Next lines: message class' names + * <br> + * Every class name is written as {@code packageName + " " + simpleName1 + " " + ... + simpleNameN}, e.g. + * "org.apache.ignite OuterClass InnerClass EvenMoreInnerClass". + */ +class IncrementalCompilationConfig { + /** Incremental compilation configuration file name. */ + static final String CONFIG_FILE_NAME = "META-INF/transferable.messages"; + + /** Message group class name. */ + private ClassName messageGroupClassName; + + /** Messages. */ + private final List<ClassName> messageClasses; + + IncrementalCompilationConfig(ClassName messageGroupClassName, List<ClassName> messageClasses) { + this.messageGroupClassName = messageGroupClassName; + this.messageClasses = List.copyOf(messageClasses); + } + + /** + * Saves configuration on disk. + * + * @param processingEnv Processing environment. + */ + void writeConfig(ProcessingEnvironment processingEnv) { + Filer filer = processingEnv.getFiler(); + + FileObject fileObject; + try { + fileObject = filer.createResource(StandardLocation.CLASS_OUTPUT, "", CONFIG_FILE_NAME); + } catch (IOException e) { + throw new ProcessingException(e.getMessage()); + } + + try (BufferedWriter writer = new BufferedWriter(fileObject.openWriter())) { + writeClassName(writer, messageGroupClassName); + + for (ClassName messageClassName : messageClasses) { + writeClassName(writer, messageClassName); + } + } catch (IOException e) { + throw new ProcessingException(e.getMessage()); + } + } + + /** + * Reads configuration from disk. + * + * @param processingEnv Processing environment. + */ + @Nullable + static IncrementalCompilationConfig readConfig(ProcessingEnvironment processingEnv) { + Filer filer = processingEnv.getFiler(); + + FileObject resource; + + try { + resource = filer.getResource(StandardLocation.CLASS_OUTPUT, "", CONFIG_FILE_NAME); + } catch (IOException e) { + return null; + } + + try (BufferedReader bufferedReader = new BufferedReader(resource.openReader(true))) { + String messageClassNameString = bufferedReader.readLine(); + + if (messageClassNameString == null) { + return null; + } + + ClassName messageClassName = readClassName(messageClassNameString); + + List<ClassName> messages = bufferedReader.lines().map(IncrementalCompilationConfig::readClassName).collect(toList()); + + return new IncrementalCompilationConfig(messageClassName, messages); + } catch (FileNotFoundException | NoSuchFileException e) { + return null; + } catch (IOException e) { + throw new ProcessingException(e.getMessage()); + } + } + + /** + * Writes class name with all the enclosing classes. + * + * @param writer Writer. + * @param className Class name. + * @throws IOException If failed. + */ + private static void writeClassName(BufferedWriter writer, ClassName className) throws IOException { + writer.write(className.packageName()); + writer.write(' '); + + List<String> simpleNames = className.simpleNames(); + + for (String enclosingSimpleName : simpleNames) { + writer.write(enclosingSimpleName); + writer.write(' '); + } + + writer.newLine(); + } + + /** + * Reads class name. + * + * @param line Line. + * @return Class name. + */ + static ClassName readClassName(String line) { + String[] split = line.split(" "); + + String packageName = split[0]; + + String firstSimpleName = split[1]; + + String[] simpleNames = split.length > 2 ? Arrays.copyOfRange(split, 2, split.length) : new String[0]; + + return ClassName.get(packageName, firstSimpleName, simpleNames); + } + + ClassName messageGroupClassName() { + return messageGroupClassName; + } + + void messageGroupClassName(ClassName messageGroupClassName) { Review comment: You're right, I thought it's already immutable, but I forgot about that part -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
