org.mycore.mir.wizard.command.MIRWizardDownloadDBLib.java Source code

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Here is the source code for org.mycore.mir.wizard.command.MIRWizardDownloadDBLib.java

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/*
 * $Id$
 * $Revision$ $Date$
 *
 * This file is part of ***  M y C o R e  ***
 * See http://www.mycore.de/ for details.
 *
 * This program is free software; you can use it, redistribute it
 * and / or modify it under the terms of the GNU General Public License
 * (GPL) 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program, in a file called gpl.txt or license.txt.
 * If not, write to the Free Software Foundation Inc.,
 * 59 Temple Place - Suite 330, Boston, MA  02111-1307 USA
 */
package org.mycore.mir.wizard.command;

import java.io.File;
import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;

import org.apache.commons.io.FileUtils;
import org.apache.commons.io.FilenameUtils;
import org.jdom2.Element;
import org.mycore.common.MCRClassTools;
import org.mycore.common.config.MCRConfigurationDir;
import org.mycore.mir.wizard.MIRWizardCommand;

public class MIRWizardDownloadDBLib extends MIRWizardCommand {

    public MIRWizardDownloadDBLib() {
        this("download");
    }

    private MIRWizardDownloadDBLib(String name) {
        super(name);
    }

    @Override
    public void doExecute() {
        Element library = getInputXML().getChild("database").getChild("library");

        if (library != null && library.getChildren().size() > 0) {
            String libDir = MCRConfigurationDir.getConfigurationDirectory().getAbsolutePath() + File.separator
                    + "lib";

            boolean success = true;
            for (Element lib : library.getChildren()) {
                String url = lib.getTextTrim();
                String fname = FilenameUtils.getName(url);
                try {
                    File file = new File(libDir + File.separator + fname);

                    FileUtils.copyURLToFile(new URL(url), file);
                    loadLib(file.toURI().toURL());

                    success = true;
                } catch (Exception ex) {
                    ex.printStackTrace();
                    success = false;
                }

                if (success) {
                    this.result.setAttribute("lib", fname);
                    this.result.setAttribute("url", url);
                    this.result.setAttribute("to", libDir);
                    break;
                }
            }

            this.result.setSuccess(success);
        }
    }

    private void loadLib(URL jarFile) throws Exception {
        URLClassLoader sysloader = (URLClassLoader) MCRClassTools.getClassLoader();
        Class<URLClassLoader> sysclass = URLClassLoader.class;

        try {
            Method method = sysclass.getDeclaredMethod("addURL", URL.class);
            method.setAccessible(true);
            method.invoke(sysloader, new Object[] { jarFile });
        } catch (Throwable t) {
            t.printStackTrace();
            throw new Exception("Error, could not add \"" + jarFile.toString() + "\" to system classloader");
        }
    }
}