WatchService 코드 정리

package kr.purred.nioWatch.main;

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;
import java.util.concurrent.TimeUnit;

public class Program
{

	/**
	 * @param args
	 */
	public static void main (String[] args)
	{
		WatchService watchService = null;
		Path path = null;
		
		try
		{
			path = Paths.get ("P:/Dev/Java/Sample/NIO/nioWatch/src/kr/purred/nioWatch/main");
			
			watchService = FileSystems.getDefault ().newWatchService ();
			
			path.register (watchService, StandardWatchEventKinds.ENTRY_CREATE, StandardWatchEventKinds.ENTRY_MODIFY, StandardWatchEventKinds.ENTRY_DELETE);
			
			while (!Thread.interrupted ())
			{
				// 와치 키를 가져오고 큐에서 키를 제거
				WatchKey key = watchService.poll ((long) 1, TimeUnit.SECONDS);
				
				if (key != null)
				{
					for (WatchEvent<?> watchEvent : key.pollEvents ())
					{
						// 미처리 이벤트 수
						System.out.println ("WatchEvent Count : " + watchEvent.count ());
						
						// 이벤트 종류를 가져온다.
						Kind<?> kind = watchEvent.kind ();
						
						// OVERFLOW 이벤트를 처리한다.
						if (kind == StandardWatchEventKinds.OVERFLOW)
							continue;
						
						System.out.println (kind);
						
						WatchEvent<Path> pathWatchEvent = (WatchEvent<Path>) watchEvent;
						
						Path fileName = pathWatchEvent.context ();
						
						System.out.println (fileName.getFileName ());
					}

					System.out.println ("키 Reset");
					
					boolean vaildKey = key.reset ();
					
					if (!vaildKey)
						break;
				}
				else
				{
					System.out.println ("감시중 ...");
				}
			}
			
			watchService.close ();
		}
		catch (IOException e)
		{
			e.printStackTrace();
		}
		catch (InterruptedException e)
		{
			e.printStackTrace();
		}
	}

}