/*
* $Id$
*
* Copyright (C) 2003-2014 JNode.org
*
* This library 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 2.1 of the License, or
* (at your option) any later version.
*
* This library 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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.fs.ramfs.def;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
import javax.naming.NameNotFoundException;
import org.apache.log4j.Logger;
import org.jnode.driver.DeviceAlreadyRegisteredException;
import org.jnode.driver.DeviceException;
import org.jnode.driver.DeviceManager;
import org.jnode.driver.DeviceNotFoundException;
import org.jnode.driver.DeviceUtils;
import org.jnode.driver.DriverException;
import org.jnode.driver.virtual.VirtualDevice;
import org.jnode.driver.virtual.VirtualDeviceFactory;
import org.jnode.fs.FSDirectory;
import org.jnode.fs.FSFile;
import org.jnode.fs.FileSystemException;
import org.jnode.fs.ramfs.RAMFileSystem;
import org.jnode.fs.ramfs.RAMFileSystemType;
import org.jnode.fs.service.FileSystemService;
import org.jnode.naming.InitialNaming;
import org.jnode.plugin.Plugin;
import org.jnode.plugin.PluginDescriptor;
import org.jnode.plugin.PluginException;
/**
* This plugin creates a new Ram filesystem and mounts it to /jnode/
*
* @author peda
*/
public class RAMFSPlugin extends Plugin {
/** RAMFS logger */
private static final Logger log = Logger.getLogger(RAMFSPlugin.class);
/**
* @param descriptor
*/
public RAMFSPlugin(PluginDescriptor descriptor) {
super(descriptor);
log.debug("RAMFSPlugin created.");
}
@Override
protected void startPlugin() throws PluginException {
log.info("start ramfs");
try {
FileSystemService fSS = InitialNaming.lookup(FileSystemService.NAME);
RAMFileSystemType type = fSS.getFileSystemType(RAMFileSystemType.ID);
try {
VirtualDevice dev =
VirtualDeviceFactory.createDevice(RAMFileSystemType.VIRTUAL_DEVICE_NAME);
log.info(dev.getId() + " registered");
final RAMFileSystem fs = type.create(dev, true);
fSS.registerFileSystem(fs);
final String mountPath = "jnode";
fSS.mount(mountPath, fs, null);
log.info("Mounted " + type.getName() + " on " + mountPath);
FSDirectory root_dir = fs.getRootEntry().getDirectory();
root_dir.addDirectory("home");
root_dir.addDirectory("tmp");
// adding files to /jnode/lib/ required by thecore classes
FSDirectory libDir = (FSDirectory) root_dir.addDirectory("lib");
InputStream is = RAMFSPlugin.class.getResourceAsStream("flavormap.properties");
if (is != null) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buf = new byte[1024];
int c;
while ((c = is.read(buf)) > -1)
baos.write(buf, 0, c);
is.close();
baos.flush();
baos.close();
ByteBuffer data = ByteBuffer.wrap(baos.toByteArray());
FSFile fmp = (FSFile) libDir.addFile("flavormap.properties");
fmp.write(0, data);
fmp.flush();
}
} catch (DeviceAlreadyRegisteredException ex) {
log.error("RAMFS is allready running.");
} catch (FileSystemException ex) {
log.error("Cannot mount " + type.getName() + " filesystem ", ex);
} catch (DeviceException ex) {
log.debug("DeviceExeption.", ex);
} catch (IOException ex) {
log.error("Cannot mount RAMFS", ex);
}
} catch (NameNotFoundException e) {
log.error("Filsystemservice not found");
} catch (FileSystemException e) {
log.error("Filesystemtype not found");
}
}
@Override
protected void stopPlugin() throws PluginException {
log.info("stop RAMFS");
try {
FileSystemService fSS = InitialNaming.lookup(FileSystemService.NAME);
final DeviceManager dm = DeviceUtils.getDeviceManager();
VirtualDevice dev = (VirtualDevice) dm.getDevice(RAMFileSystemType.VIRTUAL_DEVICE_NAME);
fSS.unregisterFileSystem(dev);
log.info("RAMFS unmounted");
dm.unregister(dev);
log.info("RAMFS unregistered");
} catch (NameNotFoundException e) {
log.error("filsystemservice / filesystemtype not found");
} catch (DeviceNotFoundException ex) {
log.info("no ramfs present");
} catch (DriverException ex) {
log.error(ex);
}
}
}