자바 Watch
Service
특정 디렉토리를 감지 하고 있다가 그
디렉토리에 이벤트 발생시 알려 준다.
import java.io.IOException;
import java.nio.file.FileSystems;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardWatchEventKinds;
import java.nio.file.WatchEvent;
import java.nio.file.WatchEvent.Kind;
import java.nio.file.WatchKey;
import java.nio.file.WatchService;
public class WatchServiceTest {
final static
Kind<Path> ENTRY_CREATE =
StandardWatchEventKinds.ENTRY_CREATE;
final static
Kind<Path> ENTRY_DELETE =
StandardWatchEventKinds.ENTRY_DELETE;
final static
Kind<Path> ENTRY_MODIFY =
StandardWatchEventKinds.ENTRY_MODIFY;
final static
Kind<Object> OVERFLOW =
StandardWatchEventKinds.OVERFLOW;
public static void main(String[] args) {
try {
WatchService watcher = FileSystems.getDefault()
.newWatchService();
Path dir = Paths.get("감시할 폴더 경로");
dir.register(watcher,ENTRY_CREATE,
ENTRY_DELETE,ENTRY_MODIFY,OVERFLOW);
while (true) {
WatchKey key;
try {
// wait for a key to be available
key = watcher.take();
} catch (InterruptedException ex) {
return;
}
for (WatchEvent<?> event : key.pollEvents()) {
// get event type
WatchEvent.Kind<?> kind = event.kind();
// get file name
@SuppressWarnings("unchecked")
WatchEvent<Path> ev = (WatchEvent<Path>) event;
Path fileName = ev.context();
System.out.println(kind.name() + ": " + fileName+" 변경 감지..");
if (kind == OVERFLOW) {
continue;
} else if (kind == ENTRY_CREATE) {
// process create event
System.out.println("Create...."+fileName.getFileName());
} else if (kind == ENTRY_DELETE) {
// process delete event
System.out.println("Delete...."+fileName.getFileName());
} else if (kind == ENTRY_MODIFY) {
// process modify event
System.out.println("Modify...."+fileName.getFileName());
}
}
// IMPORTANT: The key must be reset after processed
boolean valid = key.reset();
if (!valid) {
break;
}
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}