com.github.cmisbox.local.Watcher.java Source code

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Here is the source code for com.github.cmisbox.local.Watcher.java

Source

/*  
 *   CMISBox - Synchronize and share your files with your CMIS Repository
 *
 *   Copyright (C) 2011 - Andrea Agili 
 *  
 *    CMISBox is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 * 
 *  CMISBox is distributed in the hope that it will be useful,
 *
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with CMISBox.  If not, see <http://www.gnu.org/licenses/>.
 * 
 */

package com.github.cmisbox.local;

import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import net.contentobjects.jnotify.JNotify;
import net.contentobjects.jnotify.JNotifyException;
import net.contentobjects.jnotify.linux.JNotify_linux;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.github.cmisbox.core.Config;
import com.github.cmisbox.ui.UI;

public class Watcher implements Runnable {

    public static Watcher getInstance() {
        return Watcher.instance;
    }

    private int mask = JNotify.FILE_ANY | JNotify_linux.IN_ALL_EVENT;

    private boolean watchSubtree = true;
    private final Map<String, Integer> watches = new HashMap<String, Integer>();

    private static Watcher instance = new Watcher();

    private Thread thread;

    private Log log;

    private Watcher() {
        this.log = LogFactory.getLog(this.getClass());

        this.thread = new Thread(this, "Watcher");
        this.thread.start();
    }

    public void addWatch(String path) throws IOException {
        if (!path.startsWith(File.separator)) {
            path = File.separator + path;
        }
        this.watches.put(path, JNotify.addWatch(Config.getInstance().getWatchParent() + path, this.mask,
                this.watchSubtree, new Listener()));
        this.log.info("Watching " + path);
        UI ui = UI.getInstance();
        if (ui.isAvailable()) {
            ui.addWatch(path);
        }

    }

    public void removeWatch(String path) throws IOException {
        if (this.watches.containsKey(path)) {
            JNotify.removeWatch(this.watches.get(path));
        }
    }

    public void run() {
        try {
            while (true) {
                Thread.sleep(100000);
            }
        } catch (InterruptedException e) {
            for (Integer id : Watcher.this.watches.values()) {
                try {
                    JNotify.removeWatch(id);
                } catch (JNotifyException e1) {
                    LogFactory.getLog(this.getClass()).error(this, e);
                }
            }
        }
    }

    public void stop() {
        this.thread.interrupt();
    }

}