/* | |
* 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.nifi.util; | |
import org.slf4j.Logger; | |
import org.slf4j.LoggerFactory; | |
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.Comparator; | |
import java.util.Optional; | |
import java.util.function.ToLongFunction; | |
import java.util.stream.Stream; | |
public final class DiagnosticUtils { | |
private static final Logger logger = LoggerFactory.getLogger(DiagnosticUtils.class); | |
private DiagnosticUtils() { | |
// utility class, not meant to be instantiated | |
} | |
public static Path getOldestFile(final String diagnosticDirectoryPath) throws IOException { | |
Comparator<? super Path> lastModifiedComparator = Comparator.comparingLong(p -> p.toFile().lastModified()); | |
final Optional<Path> oldestFile; | |
try (Stream<Path> paths = Files.walk(Paths.get(diagnosticDirectoryPath))) { | |
oldestFile = paths | |
.filter(Files::isRegularFile) | |
.min(lastModifiedComparator); | |
} | |
return oldestFile.orElseThrow( | |
() -> new RuntimeException(String.format("Could not find oldest file in diagnostic directory: %s", diagnosticDirectoryPath))); | |
} | |
public static boolean isFileCountExceeded(final String diagnosticDirectoryPath, final int maxFileCount) { | |
final String[] fileNames = new File(diagnosticDirectoryPath).list(); | |
if (fileNames == null) { | |
logger.error("The diagnostic directory path provided is either invalid or not permitted to be listed."); | |
return false; | |
} | |
return fileNames.length >= maxFileCount; | |
} | |
public static boolean isSizeExceeded(final String diagnosticDirectoryPath, final long maxSizeInBytes) { | |
return getDirectorySize(Paths.get(diagnosticDirectoryPath)) >= maxSizeInBytes; | |
} | |
public static boolean createDiagnosticDirectory(final String diagnosticDirectoryPath) { | |
File file = new File(diagnosticDirectoryPath); | |
return file.mkdir(); | |
} | |
private static long getDirectorySize(Path path) { | |
long size = 0; | |
try (Stream<Path> walk = Files.walk(path)) { | |
size = walk | |
.filter(Files::isRegularFile) | |
.mapToLong(getFileSizeByPathFunction()) | |
.sum(); | |
} catch (IOException e) { | |
logger.error("Directory [{}] size calculation failed", path, e); | |
} | |
return size; | |
} | |
private static ToLongFunction<Path> getFileSizeByPathFunction() { | |
return path -> { | |
try { | |
return Files.size(path); | |
} catch (IOException e) { | |
logger.error("Failed to get size of file {}", path, e); | |
return 0L; | |
} | |
}; | |
} | |
} |