org.exist.netedit.Task.java Source code

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Here is the source code for org.exist.netedit.Task.java

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/*
 *  eXist Open Source Native XML Database
 *  Copyright (C) 2010 The eXist Project
 *  http://exist-db.org
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public License
 *  as published by the Free Software Foundation; either version 2
 *  of the License, or (at your option) any later version.
 *
 *  This program 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 Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 *  $Id$
 */

package org.exist.netedit;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Properties;
import java.util.Timer;

import org.apache.commons.httpclient.HttpException;

/**
 * @author Evgeny Gazdovsky (gazdovsky@gmail.com)
 */
public class Task {

    private NetEditApplet netEdit;

    private String downloadFrom; // URL of file download from
    private String uploadTo; // URL for upload file
    private File tmp; // Downladed file 

    /**
     * Create a new task
     * @param downloadFrom URL of file download from
     * @param uploadTo URL for upload file after changes
     * @param netEdit NetEditApplet
     */
    public Task(String downloadFrom, String uploadTo, NetEditApplet netEdit) {
        this.downloadFrom = downloadFrom;
        this.uploadTo = uploadTo;
        this.netEdit = netEdit;
    }

    /**
     * Create a task, used for stored task
     * @param downloadFrom URL of file download from
     * @param uploadTo URL for upload file after changes
     * @param tmp path of file stored in local cache
     * @param netEdit NetEditApplet
     */
    public Task(String downloadFrom, String uploadTo, File tmp, NetEditApplet netEdit) {
        this.downloadFrom = downloadFrom;
        this.uploadTo = uploadTo;
        this.netEdit = netEdit;
        this.tmp = tmp;
    }

    /**
     * Execute task: dowload file, store desrioption,
     * then file changes listener and open one 
     * in desktop application. 
     */
    public void execute() {
        try {
            tmp = netEdit.download(downloadFrom);
            store();
            Listener listener = new Listener(this, netEdit);
            Timer timer = new Timer();
            timer.schedule(listener, NetEditApplet.PERIOD, NetEditApplet.PERIOD);
            netEdit.open(tmp);
        } catch (HttpException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public String getDownloadFrom() {
        return downloadFrom;
    }

    public String getUploadTo() {
        return uploadTo;
    }

    public File getFile() {
        return tmp;
    }

    /**
     * Store task description into FS as XML doc
     * @throws IOException
     */
    public void store() throws IOException {
        Properties prop = new Properties();
        prop.put("download-from", downloadFrom);
        prop.put("upload-to", uploadTo);
        prop.put("file", tmp.getAbsolutePath());
        prop.put("modified", new Long(tmp.lastModified()).toString());
        File fld = netEdit.getMeta();
        if (!fld.isDirectory()) {
            fld.mkdirs();
        }
        String name = Integer.toHexString(downloadFrom.hashCode()) + ".xml";
        File meta = new File(fld, name);
        if (!meta.exists()) {
            meta.createNewFile();
        }
        FileOutputStream os = new FileOutputStream(meta);
        prop.storeToXML(os, "net-edit task description");
        os.close();
    }

}