/** Обработчик всех событий помещенных в очередь */
void processEvents() {
for (; ; ) {
WatchKey key;
try {
key = watcher.take();
} catch (InterruptedException x) {
LOG.log(Level.SEVERE, x.getMessage());
return;
}
Path dir = keys.get(key);
if (dir == null) {
LOG.log(Level.SEVERE, "Входной каталог не найден!");
continue;
}
for (WatchEvent<?> event : key.pollEvents()) {
WatchEvent.Kind kind = event.kind();
// TODO - подумать над обработчиком события OVERFLOW
if (kind == OVERFLOW) {
continue;
}
WatchEvent<Path> ev = cast(event);
Path name = ev.context();
Path child = dir.resolve(name);
// логируем событие
if (kind == ENTRY_CREATE) {
LOG.log(Level.FINEST, "{0}: {1}", new Object[] {event.kind().name(), child});
Runnable worker = new WorkerThread(child);
executor.execute(worker);
}
}
boolean valid = key.reset();
if (!valid) {
keys.remove(key);
if (keys.isEmpty()) {
break;
}
}
}
}
private void doProcess() throws IOException {
// (1) Create a new watch service
WatchService watchService = FileSystems.getDefault().newWatchService();
System.out.println("Watch service example 1:");
// (2) Get the directory to be monitored
Path dir = Paths.get(watchedDir);
// (3) Register the directory to be monitored with the watch service
WatchKey watchKey = dir.register(watchService, ENTRY_CREATE, ENTRY_DELETE, ENTRY_MODIFY);
System.out.println("Registered dir: " + dir.toString());
System.out.println(" Watch key (valid): " + watchKey.isValid());
// (4) Get and process the events that occur
INFINITE_WHILE_LOOP:
while (true) {
// (4a) Wait for the watch key to be signaled of events
try {
System.out.println("Waiting for watch key to be signaled...");
watchService.take();
} catch (InterruptedException ex) {
ex.printStackTrace();
break INFINITE_WHILE_LOOP;
}
// (4b) Get and process the events for the watch key
List<WatchEvent<?>> eventList = watchKey.pollEvents();
System.out.println("Process the pending events for the watch key: " + eventList.size());
EVENT_FOR_LOOP:
for (WatchEvent<?> genericEvent : eventList) {
// Retrieve and process the event kind
if (genericEvent.kind() == OVERFLOW) {
System.out.println("Overflow event");
continue EVENT_FOR_LOOP; // next event
}
// else, genericEvent.kind() is WatchEvent.Kind<Path>
// values: ENTRY_CREATE...
System.out.println("Path event kind: " + genericEvent.kind());
// Retrieve the file name associated with the event
Path filePath = (Path) genericEvent.context();
System.out.println(" File: " + filePath.toString());
} // end EVENT_FOR_LOOP (for a watch key)
// (4c) Reset the watch key
boolean validKey = watchKey.reset();
System.out.println("Watch key reset.");
if (!validKey) {
System.out.println("Invalid watch key, close the watch service");
break INFINITE_WHILE_LOOP;
}
} // end, INFINITE_WHILE_LOOP
// (5) Close the watch service
watchService.close();
System.out.println("Watch service closed.");
} // doProcess()
void scanDirectory(String path) throws IOException, InterruptedException {
watcher = FileSystems.getDefault().newWatchService();
Path directoryName = null;
Path dir = Paths.get(path);
// dir.register(watcher, ENTRY_CREATE, ENTRY_DELETE, ENTRY_MODIFY);
registerAll(dir);
System.out.println("er i path");
for (; ; ) {
WatchKey key;
try {
key = watcher.take();
} catch (InterruptedException e) {
e.printStackTrace();
return;
}
// System.out.println("er i while");
for (WatchEvent<?> event : key.pollEvents()) {
WatchEvent.Kind kind = event.kind();
WatchEvent<Path> ev = (WatchEvent<Path>) event;
Path filename = ev.context();
Path directory;
if (filename != null) {
// System.out.println("filename != null.");
directory = dir.resolve(filename);
} else {
continue;
}
// System.out.println("filename er "+filename);
if (kind == OVERFLOW) {
// System.out.println("fikk en overflow. ");
continue;
} else if (kind == ENTRY_MODIFY) {
// System.out.println(kind.name() + " for path/directory " + directory);
} else if (kind == ENTRY_CREATE) {
System.out.println(kind.name() + " for path/directory " + directory);
// System.out.println("suffix length er "+suffix[1]);
System.out.println(kind.name() + " for path/directory " + directory);
// System.out.println("filnavn er" + filename);
String suffix[] = (directory.toString()).split("\\.");
if ((suffix.length > 1) && (suffix[1].endsWith("evt"))) {
System.out.println("Laget fil.");
String adress =
(directory.getParent().toAbsolutePath() + "/" + directoryName + "/" + filename);
convertToSimpleEvent(adress);
} else if (Files.isDirectory(directory, LinkOption.NOFOLLOW_LINKS)) {
directoryName = filename;
registerAll(directory);
// System.out.println("Laget fil og venter i 6 sec.");
Thread.sleep(6000);
// traverseDirectories(directory.toString());
// System.out.println("Ny mappe er laget på lokajson."+directory);
}
} else if (kind == ENTRY_DELETE) {
System.out.println(kind.name() + " " + directory);
}
}
boolean valid = key.reset();
if (!valid) {
System.out.println("ble ikke valid " + valid);
keys.remove(key);
// all directories are inaccessible
if (keys.isEmpty()) {
break;
}
}
}
}
/** Process all events for keys queued to the watcher. */
public void processEvents() {
for (; ; ) {
// wait for key to be signaled
WatchKey key;
try {
key = watcher.take();
} catch (InterruptedException x) {
x.printStackTrace();
return;
}
Path dir = keys.get(key);
if (dir == null) {
System.err.println("WatchKey not recognized!!");
continue;
}
for (WatchEvent<?> event : key.pollEvents()) {
WatchEvent.Kind<?> kind = event.kind();
// TBD - provide example of how OVERFLOW event is handled
if (kind == OVERFLOW) {
continue;
}
// Context for directory entry event is the file name of entry
WatchEvent<Path> ev = cast(event);
Path name = ev.context();
Path child = dir.resolve(name);
// print out event
System.err.format("%s %s: %s\n", NAME, event.kind().name(), child);
// determine file type
boolean isDir = FSML.isDirectory(child);
// [MS] replace with this:
// Files.isDirectory(child, NOFOLLOW_LINKS);
if (kind == ENTRY_MODIFY) {
modifyEvent(child, isDir);
}
// if directory is created, and watching recursively, then
// register it and its sub-directories
if (recursive && (kind == ENTRY_CREATE)) {
try {
if (isDir) {
registerAll(child);
}
} catch (IOException x) {
x.printStackTrace();
}
}
}
// reset key and remove from set if directory no longer accessible
boolean valid = key.reset();
if (!valid) {
keys.remove(key);
// all directories are inaccessible
if (keys.isEmpty()) {
break;
}
}
}
}
