Java WatchEvent.kind方法代码示例

import java.nio.file.WatchEvent; //导入方法依赖的package包/类
@Override
protected String nextEvent() throws IOException, InterruptedException {
    WatchKey key;
    try {
        key = watcher.take();
    } catch (ClosedWatchServiceException cwse) { // #238261
        @SuppressWarnings({"ThrowableInstanceNotThrown"})
        InterruptedException ie = new InterruptedException();
        throw (InterruptedException) ie.initCause(cwse);
    }
    Path dir = (Path)key.watchable();
           
    String res = dir.toAbsolutePath().toString();
    for (WatchEvent<?> event: key.pollEvents()) {
        if (event.kind() == OVERFLOW) {
            // full rescan
            res = null;
        }
    }
    key.reset();
    return res;
}
 

import java.nio.file.WatchEvent; //导入方法依赖的package包/类
@Override
public void run() {
    WatchService watchService = WatchServiceUtil.watchModify(pluginDir);
    WatchKey key;
    while (watchService != null){
        try {
            key = watchService.take();
            for (WatchEvent<?> watchEvent : key.pollEvents()) {
                if(watchEvent.kind() == ENTRY_MODIFY){
                    String fileName = watchEvent.context() == null ? "" : watchEvent.context().toString();
                    Plugin plugin = PluginLibraryHelper.getPluginByConfigFileName(fileName);
                    if(plugin != null){
                        plugin.init(PluginLibraryHelper.getPluginConfig(plugin));
                        log.info("已完成插件{}的配置重新加载",plugin.pluginName());
                    }
                }
            }
            key.reset();
        } catch (Exception e) {
            log.error("插件配置文件监听异常",e);
            break;
        }
    }
}
 

import java.nio.file.WatchEvent; //导入方法依赖的package包/类
/**
 * Processes subevents of the key.
 * @param key That has new events.
 * @param dir For the key.
 * @throws IOException If a subdirectory cannot be registered.
 */
private void processSubevents(final WatchKey key, final Path dir)
    throws IOException {
    for (final WatchEvent event : key.pollEvents()) {
        final WatchEvent.Kind kind = event.kind();
        final Path name = (Path) event.context();
        final Path child = dir.resolve(name);
        Logger.debug(
            this,
            "%s: %s%n", event.kind().name(), child
        );
        if (kind == ENTRY_CREATE) {
            try {
                if (Files.isDirectory(child)) {
                    this.processSubevents(child);
                }
            } catch (final IOException ex) {
                throw new IOException(
                    "Failed to register subdirectories.",
                    ex
                );
            }
        }
    }
}
 

import java.nio.file.WatchEvent; //导入方法依赖的package包/类
@SuppressWarnings("unchecked")
@Override
public void run() {
	while (running) {
		try {
			final WatchKey watchKey = watcher.take();
			for (final WatchEvent<?> event : watchKey.pollEvents()) {
				Path changed = (Path) event.context();
				if (changed == null || event.kind() == StandardWatchEventKinds.OVERFLOW) {
					System.out.println("bad file watch event: " + event);
					continue;
				}
				changed = watchedDirectory.resolve(changed);
				for (final ListenerAndPath x : listeners) {
					if (Thread.interrupted() && !running)
						return;
					if (changed.startsWith(x.startPath)) {
						x.listener.fileChanged(changed, (Kind<Path>) event.kind());
					}
				}
			}
			watchKey.reset();
		} catch (final InterruptedException e) {}
	}
}
 

import java.nio.file.WatchEvent; //导入方法依赖的package包/类
/**
 * Handles a watchevent, it currently only handles the DELETE and MODIFY - create isn't handled
 * as when you create a new file you get two events - one of the create and one for the modify,
 * therefore it can be safely handled in the modify only.
 *
 * If the delete corresponds to a adapter loaded - it deregisterWithAdapterManager it with the
 * adatperManager If the modify is new / modified it passes it to the load method that handles
 * re-registering existing adapters
 *
 * @param event
 */
public void processWatchEvent(final WatchEvent<?> event) {
    synchronized (propertiesToAdapter) {
        if (LOG.isInfoEnabled()) {
            LOG.info("Logging watch event:" + event.kind() + ": " + event.context());
        }
        // check it is ended with .properties
        if (isPropertyFile(event)) {
            String path = ((Path) event.context()).toString();
            Adapter adapter = propertiesToAdapter.get(path);
            // if we have already seen this then deregister it
            if (adapter != null) {
                removeAdapter(path, adapter);
            }

            if (event.kind() == StandardWatchEventKinds.ENTRY_CREATE
                    || event.kind() == StandardWatchEventKinds.ENTRY_MODIFY) {
                File file = new File(getPathToWatch().toString(), ((Path) event.context()).toString());
                load(file);
            }
        }
    }
}
 

import java.nio.file.WatchEvent; //导入方法依赖的package包/类
/** Notify file system event. */
void processEvent() {
	while(true) {
		WatchKey signal;
		
		try {
			signal = watcher.take();
		} catch (InterruptedException e) {
			return;
		}
		
		for(WatchEvent<?> event : signal.pollEvents()) {
			Kind<?> kind = event.kind();
			
			if(kind == StandardWatchEventKinds.OVERFLOW) {
				continue;
			}
			
			Path name = (Path)event.context();
			notify(name.toAbsolutePath().toString(), kind);
		}
		
		key.reset();
	}
}
 

import java.nio.file.WatchEvent; //导入方法依赖的package包/类
private void processWatchKey(WatchKey watchKey) throws IOException {
  final long start = System.currentTimeMillis();
  final List<WatchEvent<?>> events = watchKey.pollEvents();

  int processed = 0;

  for (WatchEvent<?> event : events) {
    WatchEvent.Kind<?> kind = event.kind();

    if (!watchEvents.contains(kind)) {
      LOG.trace("Ignoring an {} event to {}", event.context());
      continue;
    }

    WatchEvent<Path> ev = cast(event);
    Path filename = ev.context();

    if (processEvent(kind, filename)) {
      processed++;
    }
  }

  LOG.debug("Handled {} out of {} event(s) for {} in {}", processed, events.size(), watchDirectory, JavaUtils.duration(start));
}
 

import java.nio.file.WatchEvent; //导入方法依赖的package包/类
private void handleEvent(final WatchKeyHolder watchKeys, final WatchKey key) throws IOException {
  for (final WatchEvent<?> event : key.pollEvents()) {
    if (event.kind() == StandardWatchEventKinds.OVERFLOW) {
      continue;
    }

    final WatchEvent<Path> watchEvent = cast(event);
    Path path = watchKeys.get(key);
    if (path == null) {
      continue;
    }

    path = path.resolve(watchEvent.context());
    if (Files.isDirectory(path, LinkOption.NOFOLLOW_LINKS)) {
      if (event.kind() == StandardWatchEventKinds.ENTRY_CREATE) {
        watchKeys.register(path);
      }
    } else {
      // Dispatch
      FileEvent fe = toEvent(watchEvent, path);
      if (fe != null) {
        this.eventBus.post(fe);
      }
    }
  }
}
 

import java.nio.file.WatchEvent; //导入方法依赖的package包/类
public void run() {
    Logger.info(TAG, "Modified %s STARTED", pin.getCode());
    while (!closed) {
        WatchKey key = null;
        try {
            key = service.take();
        } catch (InterruptedException e) {
        }
        if (this.key.equals(key)) {
            for (WatchEvent<?> event : key.pollEvents()) {
                WatchEvent.Kind<?> kind = event.kind();
                if (!kind.equals(ENTRY_MODIFY) || !event.context().toString().equals(pin.getPath().getName()))
                    continue;
                onChange(pin);
            }
        }
        boolean valid = key.reset();
        if (!valid) {
            break;
        }
    }
}
 

import java.nio.file.WatchEvent; //导入方法依赖的package包/类
/**
 * Handle event.
 *
 * @param key the key
 */
private void handleEvent(final WatchKey key) {
    this.readLock.lock();
    try {
        for (final WatchEvent<?> event : key.pollEvents()) {
            if (event.count() <= 1) {
                final WatchEvent.Kind kind = event.kind();

                //The filename is the context of the event.
                final WatchEvent<Path> ev = (WatchEvent<Path>) event;
                final Path filename = ev.context();

                final Path parent = (Path) key.watchable();
                final Path fullPath = parent.resolve(filename);
                final File file = fullPath.toFile();

                LOGGER.trace("Detected event [{}] on file [{}]. Loading change...", kind, file);
                if (kind.name().equals(ENTRY_CREATE.name()) && file.exists()) {
                    handleCreateEvent(file);
                } else if (kind.name().equals(ENTRY_DELETE.name())) {
                    handleDeleteEvent();
                } else if (kind.name().equals(ENTRY_MODIFY.name()) && file.exists()) {
                    handleModifyEvent(file);
                }
            }

        }
    } finally {
        this.readLock.unlock();
    }
}
 

import java.nio.file.WatchEvent; //导入方法依赖的package包/类
@Override
public void run() {
    WatchService watchService = WatchServiceUtil.watchModify(confDir);
    WatchKey key;
    while (watchService != null){
        try {
            key = watchService.take();
            for (WatchEvent<?> watchEvent : key.pollEvents()) {
                if(watchEvent.kind() == ENTRY_MODIFY){
                    String fileName = watchEvent.context() == null ? "" : watchEvent.context().toString();
                    if("authorization.properties".equals(fileName)){
                        log.info("检测到授权文件authorization.properties有改动,正在重新配置相关插件配置");
                        Set<Plugin> plugins = PluginLibraryHelper.getPluginsAboutAuthorization();
                        for (Plugin plugin : plugins) {
                            plugin.init(PluginLibraryHelper.getPluginConfig(plugin));
                            log.info("已完成插件{}的配置重新加载",plugin.pluginName());
                        }
                    }
                }
            }
            key.reset();
        } catch (Exception e) {
            log.error("插件配置文件监听异常",e);
            break;
        }
    }
}
 

import java.nio.file.WatchEvent; //导入方法依赖的package包/类
public void handleEvent ( final Path watchable, final WatchEvent<?> event ) throws IOException
{
    final Path path = (Path)event.context ();
    logger.debug ( "Change {} for base: {} on {}", new Object[] { event.kind (), watchable, path } );

    if ( watchable.endsWith ( "native" ) && path.toString ().equals ( "settings.xml" ) )
    {
        if ( event.kind () != StandardWatchEventKinds.ENTRY_DELETE )
        {
            check ();
        }
        else
        {
            storageRemoved ();
        }
    }
    else
    {
        if ( path.toString ().equals ( "settings.xml" ) )
        {
            if ( event.kind () == StandardWatchEventKinds.ENTRY_CREATE )
            {
                this.nativeKey = new File ( watchable.toFile (), "native" ).toPath ().register ( this.watcher, StandardWatchEventKinds.ENTRY_CREATE, StandardWatchEventKinds.ENTRY_MODIFY, StandardWatchEventKinds.ENTRY_DELETE );
            }
        }
        else if ( path.toString ().endsWith ( ".hds" ) )
        {
            if ( this.id != null )
            {
                this.storageManager.fileChanged ( this.path.toFile (), this.id, path.toFile () );
            }
        }
    }
}
 

import java.nio.file.WatchEvent; //导入方法依赖的package包/类
private void checkBaseEvents ( final WatchKey key, final List<WatchEvent<?>> events )
{
    for ( final WatchEvent<?> event : events )
    {
        if ( ! ( event.context () instanceof Path ) )
        {
            continue;
        }

        final Path path = this.base.resolve ( (Path)event.context () );

        logger.debug ( "Event for {}, {} : {} -> {}", new Object[] { event.context (), key.watchable (), event.kind (), path } );

        if ( event.kind () == StandardWatchEventKinds.ENTRY_DELETE )
        {
            // check delete
            checkDeleteStorage ( path );
        }
        else
        {
            try
            {
                checkAddStorage ( path );
            }
            catch ( final IOException e )
            {
                logger.warn ( "Failed to check for storage", e );
            }
        }
    }
}
 

import java.nio.file.WatchEvent; //导入方法依赖的package包/类
private void processFileSystemChanges(final Path watchedDirectory, final WatchKey key) {
    final ChangesProcessor processor = getChangesProcessorOrNull(watchedDirectory);

    if (processor == null) {
        log.warn("Ignoring change in {}: no change processor found", watchedDirectory);
        return;
    }

    processor.start();

    for (WatchEvent<?> event : key.pollEvents()) {
        final WatchEvent.Kind<?> kind = event.kind();
        final Object eventContext = event.context();

        log.debug("Processing {} {} in {}", kind.name(), eventContext, watchedDirectory);

        if (kind == StandardWatchEventKinds.OVERFLOW) {
            log.info("event overflow in {}. Reimporting and registering watchedDirectory '{}' to avoid half synced state",
                    watchedDirectory, watchedDirectory);
            if (Files.exists(watchedDirectory)) {
                registerQuietly(watchedDirectory);
            }
            processor.processChange(kind, watchedDirectory, true);
        } else {
            final Path changedRelPath = (Path) eventContext;
            final Path changedAbsPath = watchedDirectory.resolve(changedRelPath);
            final boolean isDirectory = isDirectory(changedAbsPath, kind);
            if (watchedFiles.matches(changedAbsPath, isDirectory)) {
                if (isDirectory && kind == StandardWatchEventKinds.ENTRY_CREATE) {
                    registerQuietly(changedAbsPath);
                }
                processor.processChange(kind, changedAbsPath, isDirectory);
            } else {
                log.debug("Skipping excluded path {}", changedAbsPath);
            }
        }
    }
}
 

import java.nio.file.WatchEvent; //导入方法依赖的package包/类
private void callback(final Local folder, final WatchEvent<?> event, final FileWatcherListener l) {
    final WatchEvent.Kind<?> kind = event.kind();
    if(log.isInfoEnabled()) {
        log.info(String.format("Process file system event %s for %s", kind.name(), event.context()));
    }
    if(ENTRY_MODIFY == kind) {
        l.fileWritten(this.normalize(folder, event.context().toString()));
    }
    else if(ENTRY_DELETE == kind) {
        l.fileDeleted(this.normalize(folder, event.context().toString()));
    }
    else if(ENTRY_CREATE == kind) {
        l.fileCreated(this.normalize(folder, event.context().toString()));
    }
    else {
        log.debug(String.format("Ignored file system event %s for %s", kind.name(), event.context()));
    }
}