private void refresh() throws IOException {
while (true) {
WatchKey watchKey = watchService.poll();
if (watchKey == null) {
return;
}
Path parentDir = (Path) watchKey.watchable();
for (WatchEvent<?> watchEvent : watchKey.pollEvents()) {
WatchEvent.Kind<?> eventKind = watchEvent.kind();
if (eventKind == OVERFLOW) {
fullRefresh();
return;
}
Path child = parentDir.resolve((Path) watchEvent.context());
if (eventKind == ENTRY_CREATE) {
onNewPath(child);
} else if (eventKind == ENTRY_DELETE) {
onRemovedPath(child);
}
}
watchKey.reset();
}
}
private void onNewDirectory(Path directory) throws IOException {
String relativePath = getRelativePath(directory);
if (!relativePath.isEmpty() && !getPathPrefixSet().includesDirectory(relativePath)) {
return;
}
if (watchService != null) {
// Start watching the directory.
directory.register(watchService, ENTRY_CREATE, ENTRY_DELETE);
}
try (DirectoryStream<Path> stream = Files.newDirectoryStream(directory)) {
for (Path child : stream) {
childPathsByParentPath.put(directory, child);
onNewPath(child);
}
}
}