Sorry for asking so many dumb questions here, but I'm lost.
I'm trying to create virtual file system with no ability to create folders and
list resources, but with ability to read and write to predefined resources.
Mapping between allowed resources and files on disk located in Map accessed by
MappingSingleton (it's nothing except synchronized hashmap with disk file
storage
at the backend)
I created BasicWebdavStore implementation:
package webdav.store;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.security.Principal;
import java.util.Date;
import java.util.Hashtable;
import java.util.Map;
import org.apache.commons.transaction.util.LoggerFacade;
import org.apache.slide.common.Service;
import org.apache.slide.common.ServiceAccessException;
import org.apache.slide.common.ServiceParameterErrorException;
import org.apache.slide.common.ServiceParameterMissingException;
import org.apache.slide.lock.ObjectLockedException;
import org.apache.slide.security.AccessDeniedException;
import org.apache.slide.security.UnauthenticatedException;
import org.apache.slide.simple.store.BasicWebdavStore;
import org.apache.slide.structure.ObjectAlreadyExistsException;
import org.apache.slide.structure.ObjectNotFoundException;
/**
* Virtual filesystem store
*/
public class VirtualFileSystemStoreImpl implements BasicWebdavStore {
public static final String MAPPING = "mapping";
private static final String FILES = "/files";
private static LoggerFacade logger;
/**
* Mapping instance
*/
private MappingSingleton mappings;
/**
* @see
org.apache.slide.simple.store.BasicWebdavStore#begin(org.apache.slide.common.Service,
* java.security.Principal, java.lang.Object,
* org.apache.commons.transaction.util.LoggerFacade,
* java.util.Hashtable)
*/
public void begin(Service service, Principal principal, Object connection,
LoggerFacade logger, Hashtable parameters)
throws ServiceAccessException, ServiceParameterErrorException,
ServiceParameterMissingException {
String mapping = (String) parameters.get(MAPPING);
if (mapping == null)
throw new ServiceParameterMissingException(service, "Parameter "
+ MAPPING + " missing");
mappings = MappingSingleton.getInstance(mapping);
this.logger = logger;
}
/**
* @see org.apache.slide.simple.store.BasicWebdavStore#checkAuthentication()
*/
public void checkAuthentication() throws UnauthenticatedException {
}
/**
* @see org.apache.slide.simple.store.BasicWebdavStore#commit()
*/
public void commit() throws ServiceAccessException {
}
/**
* @see
org.apache.slide.simple.store.BasicWebdavStore#createFolder(java.lang.String)
*/
public void createFolder(String folderUri) throws ServiceAccessException,
AccessDeniedException, ObjectAlreadyExistsException,
ObjectLockedException {
logger.logInfo("Creating folder " + folderUri);
throw new AccessDeniedException("", "", "");
}
/**
* @see
org.apache.slide.simple.store.BasicWebdavStore#createResource(java.lang.String)
*/
public void createResource(String resourceUri)
throws ServiceAccessException, AccessDeniedException,
ObjectAlreadyExistsException, ObjectLockedException {
throw new AccessDeniedException("", "", "");
}
/**
* @see
org.apache.slide.simple.store.BasicWebdavStore#getChildrenNames(java.lang.String)
*/
public String[] getChildrenNames(String folderUri)
throws ServiceAccessException, AccessDeniedException,
ObjectNotFoundException, ObjectLockedException {
// don't allow to view contents of directory
return null;
}
/**
* @see
org.apache.slide.simple.store.BasicWebdavStore#getCreationDate(java.lang.String)
*/
public Date getCreationDate(String uri) throws ServiceAccessException,
AccessDeniedException, ObjectNotFoundException,
ObjectLockedException {
Map map = mappings.loadMapping();
Date modified = null;
if (map.containsKey(uri)) {
String path = (String) map.get(uri);
File file = new File(path);
modified = new Date(file.lastModified());
}
return modified;
}
/**
* @see
org.apache.slide.simple.store.BasicWebdavStore#getLastModified(java.lang.String)
*/
public Date getLastModified(String uri) throws ServiceAccessException,
AccessDeniedException, ObjectNotFoundException,
ObjectLockedException {
return getCreationDate(uri);
}
/**
* @see
org.apache.slide.simple.store.BasicWebdavStore#getResourceContent(java.lang.String)
*/
public InputStream getResourceContent(String resourceUri)
throws ServiceAccessException, AccessDeniedException,
ObjectNotFoundException, ObjectLockedException {
Map map = mappings.loadMapping();
if (map.containsKey(resourceUri)) {
String path = (String) map.get(resourceUri);
try {
FileInputStream fis = new FileInputStream(path);
return fis;
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}
return null;
}
/**
* @see
org.apache.slide.simple.store.BasicWebdavStore#getResourceLength(java.lang.String)
*/
public long getResourceLength(String resourceUri)
throws ServiceAccessException, AccessDeniedException,
ObjectNotFoundException, ObjectLockedException {
Map map = mappings.loadMapping();
long length = 0;
if (map.containsKey(resourceUri)) {
String path = (String) map.get(resourceUri);
File file = new File(path);
length = file.length();
}
return length;
}
/**
* @see
org.apache.slide.simple.store.BasicWebdavStore#isFolder(java.lang.String)
*/
public boolean isFolder(String uri) throws ServiceAccessException,
AccessDeniedException, ObjectLockedException {
logger.logInfo("isFolder " + uri);
return FILES.equals(uri);
}
/**
* @see
org.apache.slide.simple.store.BasicWebdavStore#isResource(java.lang.String)
*/
public boolean isResource(String uri) throws ServiceAccessException,
AccessDeniedException, ObjectLockedException {
Map map = mappings.loadMapping();
return map.containsKey(uri);
}
/**
* @see
org.apache.slide.simple.store.BasicWebdavStore#objectExists(java.lang.String)
*/
public boolean objectExists(String uri) throws ServiceAccessException,
AccessDeniedException, ObjectLockedException {
Map map = mappings.loadMapping();
logger.logInfo("objectExists " + uri);
return FILES.equals(uri) || map.containsKey(uri);
}
/**
* @see
org.apache.slide.simple.store.BasicWebdavStore#removeObject(java.lang.String)
*/
public void removeObject(String uri) throws ServiceAccessException,
AccessDeniedException, ObjectNotFoundException,
ObjectLockedException {
throw new AccessDeniedException("", "", "");
}
/**
* @see org.apache.slide.simple.store.BasicWebdavStore#rollback()
*/
public void rollback() throws ServiceAccessException {
}
/**
* @see
org.apache.slide.simple.store.BasicWebdavStore#setResourceContent(java.lang.String,
* java.io.InputStream, java.lang.String, java.lang.String)
*/
public void setResourceContent(String resourceUri, InputStream content,
String contentType, String characterEncoding)
throws ServiceAccessException, AccessDeniedException,
ObjectNotFoundException, ObjectLockedException {
// FIXME Auto-generated method stub
Map map = mappings.loadMapping();
if (map.containsKey(resourceUri)) {
String path = (String) map.get(resourceUri);
try {
FileOutputStream fos = new FileOutputStream(path);
byte[] buffer = new byte[1024 * 20];
int read = 0;
while ((read = content.read(buffer)) > 0)
fos.write(buffer, 0, read);
fos.flush();
fos.close();
content.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
but when I setup this store in Domain.xml, i'm getting exception:
15 Feb 2006 18:43:30 - org.apache.slide.common.XMLUnmarshaller - INFO - Loading
object /files
15 Feb 2006 18:43:30 - WebDAV store - INFO - objectExists /files
15 Feb 2006 18:43:30 - WebDAV store - INFO - isFolder /files
15 Feb 2006 18:43:30 - org.apache.slide.common.XMLUnmarshaller - INFO - Object
already exists at /files
15 Feb 2006 18:43:30 - WebDAV store - INFO - objectExists /files
15 Feb 2006 18:43:30 - WebDAV store - INFO - objectExists /files
15 Feb 2006 18:43:30 - WebDAV store - INFO - objectExists /files
15 Feb 2006 18:43:30 - WebDAV store - INFO - isFolder /files
15 Feb 2006 18:43:30 - WebDAV store - INFO - objectExists /files
15 Feb 2006 18:43:30 - org.apache.slide.common.Domain - WARNING - Invalid
object at : No content
15 Feb 2006 18:43:30 - org.apache.slide.common.Namespace - ERROR - Unable to
read Namespace base configuration file :
15 Feb 2006 18:43:30 - org.apache.slide.common.Namespace - ERROR -
org.apache.slide.common.ObjectValidationFailedException: Invalid object at :
No content
org.apache.slide.common.ObjectValidationFailedException: Invalid object at :
No content
I don't have "files" folder under the root store, basically I don't have root
folder in the store at all. I checked implementation of isFolder, isResource,
objectExists methods in sources for
org.apache.slide.simple.reference.WebdavFileStore
Could somebody please help?
--
Eugene N Dzhurinsky
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