| /* |
| * 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.iotdb.commons.utils; |
| |
| import org.apache.iotdb.commons.conf.CommonDescriptor; |
| import org.apache.iotdb.tsfile.fileSystem.FSFactoryProducer; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| import java.util.stream.Stream; |
| |
| public class JVMCommonUtils { |
| /** Default executor pool maximum size. */ |
| public static final int MAX_EXECUTOR_POOL_SIZE = Math.max(100, getCpuCores() * 5); |
| |
| private static final int CPUS = Runtime.getRuntime().availableProcessors(); |
| |
| private static final double diskSpaceWarningThreshold = |
| CommonDescriptor.getInstance().getConfig().getDiskSpaceWarningThreshold(); |
| |
| /** |
| * get JDK version. |
| * |
| * @return JDK version (int type) |
| */ |
| public static int getJdkVersion() { |
| String[] javaVersionElements = System.getProperty("java.version").split("-")[0].split("\\."); |
| if (Integer.parseInt(javaVersionElements[0]) == 1) { |
| return Integer.parseInt(javaVersionElements[1]); |
| } else { |
| return Integer.parseInt(javaVersionElements[0]); |
| } |
| } |
| |
| /** |
| * NOTICE: This method is currently used only for data dir, thus using FSFactory to get file |
| * |
| * @param dir directory path |
| * @return |
| */ |
| public static long getUsableSpace(String dir) { |
| File dirFile = FSFactoryProducer.getFSFactory().getFile(dir); |
| dirFile.mkdirs(); |
| return dirFile.getFreeSpace(); |
| } |
| |
| public static double getDiskFreeRatio(String dir) { |
| File dirFile = FSFactoryProducer.getFSFactory().getFile(dir); |
| dirFile.mkdirs(); |
| return 1.0 * dirFile.getFreeSpace() / dirFile.getTotalSpace(); |
| } |
| |
| public static boolean hasSpace(String dir) { |
| return getDiskFreeRatio(dir) > diskSpaceWarningThreshold; |
| } |
| |
| public static long getOccupiedSpace(String folderPath) throws IOException { |
| Path folder = Paths.get(folderPath); |
| try (Stream<Path> s = Files.walk(folder)) { |
| return s.filter(p -> p.toFile().isFile()).mapToLong(p -> p.toFile().length()).sum(); |
| } |
| } |
| |
| public static int getCpuCores() { |
| return CPUS; |
| } |
| |
| public static int getMaxExecutorPoolSize() { |
| return MAX_EXECUTOR_POOL_SIZE; |
| } |
| } |