测试导出dnc

yangys

8 天以前 f4c6e0e1308bccb943ca1cddfdf7f643b6b6a1aa

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package org.springblade.mdm.machineback.filewatch;
 
import org.springframework.stereotype.Service;
 
import java.io.IOException;
import java.nio.file.*;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
 
import static java.nio.file.StandardWatchEventKinds.*;
@Service
public class FileWatcherService {
 
    private final ExecutorService executor = Executors.newCachedThreadPool();
    private final Map<Path, WatchService> watchServices = new HashMap<>();
    private final Map<Path, FileChangeListener> listeners = new HashMap<>();
 
    public interface FileChangeListener {
        void onFileCreated(Path filePath);
        void onFileModified(Path filePath);
        void onFileDeleted(Path filePath);
    }
 
    public void watchDirectory(Path directory, FileChangeListener listener) throws IOException {
        if (!Files.isDirectory(directory)) {
            throw new IllegalArgumentException("Path must be a directory: " + directory);
        }
 
        if (watchServices.containsKey(directory)) {
            throw new IllegalStateException("Directory is already being watched: " + directory);
        }
 
        WatchService watchService = FileSystems.getDefault().newWatchService();
        directory.register(watchService, ENTRY_CREATE, ENTRY_MODIFY, ENTRY_DELETE);
 
        watchServices.put(directory, watchService);
        listeners.put(directory, listener);
 
        executor.submit(() -> {
            try {
                while (true) {
                    WatchKey key = watchService.take();
                    for (WatchEvent<?> event : key.pollEvents()) {
                        WatchEvent.Kind<?> kind = event.kind();
 
                        @SuppressWarnings("unchecked")
                        WatchEvent<Path> ev = (WatchEvent<Path>) event;
                        Path fileName = ev.context();
                        Path fullPath = directory.resolve(fileName);
 
                        FileChangeListener currentListener = listeners.get(directory);
                        if (currentListener == null) break;
 
                        if (kind == ENTRY_CREATE) {
                            currentListener.onFileCreated(fullPath);
                        } else if (kind == ENTRY_MODIFY) {
                            currentListener.onFileModified(fullPath);
                        } else if (kind == ENTRY_DELETE) {
                            currentListener.onFileDeleted(fullPath);
                        }
                    }
                    boolean valid = key.reset();
                    if (!valid) {
                        break;
                    }
                }
            } catch (InterruptedException e) {
                Thread.currentThread().interrupt();
            } catch (ClosedWatchServiceException e) {
                // Service was closed, exit normally
            }
        });
    }
 
    public void stopWatching(Path directory) throws IOException {
        WatchService watchService = watchServices.remove(directory);
        listeners.remove(directory);
        if (watchService != null) {
            watchService.close();
        }
    }
 
    public void shutdown() {
        executor.shutdownNow();
        watchServices.values().forEach(watchService -> {
            try {
                watchService.close();
            } catch (IOException e) {
                // Ignore on shutdown
            }
        });
        watchServices.clear();
        listeners.clear();
    }
}