alex-plekhanov commented on a change in pull request #6845: IGNITE-12145: Monitoring list engine. URL: https://github.com/apache/ignite/pull/6845#discussion_r321754188
########## File path: modules/codegen/src/main/java/org/apache/ignite/codegen/MonitoringRowAttributeWalkerGenerator.java ########## @@ -0,0 +1,283 @@ +/* + * 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.codegen; + +import java.io.File; +import java.io.FileWriter; +import java.io.IOException; +import java.lang.reflect.Method; +import java.lang.reflect.Modifier; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Collection; +import java.util.Collections; +import java.util.Comparator; +import java.util.HashSet; +import java.util.List; +import java.util.Set; +import java.util.TreeSet; +import java.util.function.ObjIntConsumer; +import org.apache.ignite.internal.processors.metric.list.walker.Order; +import org.apache.ignite.spi.metric.jmx.MonitoringListMBean; +import org.apache.ignite.spi.metric.list.MonitoringList; +import org.apache.ignite.spi.metric.list.MonitoringRow; +import org.apache.ignite.spi.metric.list.MonitoringRowAttributeWalker; +import org.apache.ignite.spi.metric.list.view.CacheGroupView; +import org.apache.ignite.spi.metric.list.view.CacheView; +import org.apache.ignite.spi.metric.list.view.ComputeTaskView; +import org.apache.ignite.spi.metric.list.view.ServiceView; + +import static org.apache.ignite.codegen.MessageCodeGenerator.DFLT_SRC_DIR; +import static org.apache.ignite.codegen.MessageCodeGenerator.TAB; + +/** + * Application for code generation of {@link MonitoringRowAttributeWalker}. + * Usage: simply run main method from Ignite source folder(using IDE or other way). + * Generated code used in {@link MonitoringList}. + * + * @see MonitoringListMBean + * @see MonitoringListLocalSystemView + */ +public class MonitoringRowAttributeWalkerGenerator { + /** Methods that should be excluded from specific {@link MonitoringRowAttributeWalker}. */ + private static final Set<String> SYS_METHODS = new HashSet<>(Arrays.asList("equals", "hashCode", "toString", + "getClass", "monitoringRowId")); + + /** Package for {@link MonitoringRowAttributeWalker} implementations. */ + public static final String WALKER_PACKAGE = "org.apache.ignite.internal.processors.metric.list.walker"; + + /** + * @throws Exception If generation failed. + */ + public static void main(String[] args) throws Exception { + MonitoringRowAttributeWalkerGenerator gen = new MonitoringRowAttributeWalkerGenerator(); + + gen.generateAndWrite(CacheGroupView.class, DFLT_SRC_DIR); + gen.generateAndWrite(CacheView.class, DFLT_SRC_DIR); + gen.generateAndWrite(ServiceView.class, DFLT_SRC_DIR); + gen.generateAndWrite(ComputeTaskView.class, DFLT_SRC_DIR); + } + + /** + * Generates {@link MonitoringRowAttributeWalker} implementation and write it to the file. + * + * @param clazz Class to geneare {@link MonitoringRowAttributeWalker} for. + * @param srcRoot Source root folder. + * @param <T> type of the {@link MonitoringRow}. + * @throws IOException If generation failed. + */ + private <T extends MonitoringRow<?>> void generateAndWrite(Class<T> clazz, String srcRoot) throws IOException { + File walkerClass = new File(srcRoot + '/' + WALKER_PACKAGE.replaceAll("\\.", "/") + '/' + + clazz.getSimpleName() + "Walker.java"); + + Collection<String> code = generate(clazz); + + walkerClass.createNewFile(); + + try (FileWriter writer = new FileWriter(walkerClass)) { + for (String line : code) { + writer.write(line); + writer.write('\n'); + } + } + } + + /** + * Generates {@link MonitoringRowAttributeWalker} implementation. + * + * @param clazz Class to geneare {@link MonitoringRowAttributeWalker} for. + * @param <T> type of the {@link MonitoringRow}. + * @return Java source code of the {@link MonitoringRowAttributeWalker} implementation. + */ + private <T extends MonitoringRow<?>> Collection<String> generate(Class<T> clazz) { + final List<String> code = new ArrayList<>(); + final Set<String> imports = new TreeSet<>(); + + imports.add("import " + MonitoringRowAttributeWalker.class.getName() + ';'); + imports.add("import " + clazz.getName() + ';'); + + String simpleName = clazz.getSimpleName(); + + code.add("package " + WALKER_PACKAGE + ";"); + code.add(""); + code.add("/**"); + code.add(" * Generated by {@code " + MonitoringRowAttributeWalkerGenerator.class.getName() + "}."); + code.add(" * {@link " + simpleName + "} attributes walker."); + code.add(" * "); + code.add(" * @see " + simpleName); + code.add(" */"); + code.add("public class " + simpleName + "Walker implements MonitoringRowAttributeWalker<" + simpleName + "> {"); + code.add(TAB + "/** {@inheritDoc} */"); + code.add(TAB + "@Override public void visitAll(AttributeVisitor v) {"); + + forEachMethod(clazz, (m, i) -> { + String name = m.getName(); + + Class<?> retClazz = m.getReturnType(); + + String line = TAB + TAB; + + if (!retClazz.isPrimitive()) { + if (!retClazz.getName().startsWith("java.lang")) + imports.add("import " + retClazz.getName() + ';'); + + line += "v.accept(" + i + ", \"" + name + "\", " + retClazz.getSimpleName() + ".class);"; + } else if (retClazz == boolean.class) Review comment: NL ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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