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Provides a factory interface to the remote file classes, since these
objects cannot be instantiated by classes outside of the
jnfs package. The server side consists of an implementation
of the file system interface (provided by FileServerStarter)
and the client side must obtain a remote reference to the server
(provided by the FileServerHandle).
serviceName
finishAuthentication(Response)
Token for use in
further transactions.
getFile(Token, File)
RemoteFile instance that represents the file
whose pathname is the given file argument.
getFileInputStream(Token, File)
File object.
getFileOutputStream(Token, File)
File object.
getFileOutputStream(Token, File, boolean)
File object for appending or overwriting.
getRandomAccessFile(Token, File, String)
File argument.
getRootDirectoryName()
initAuthentication(String)
Challenge for user to sign
with their private key.
serviceName
public static final String serviceName
To get a handle to the FileServer, use a snippet of code such as:
jnfs.FileServer srv =
(jnfs.FileServer) java.rmi.Naming.lookup("rmi://" + hostname + "/" +
jnfs.FileServer.serviceName);
initAuthentication
public abstract Challenge initAuthentication(String user) throws RemoteException, AuthenticationException
Challenge for user to sign
with their private key. The user responds by creating a
Response object using the
Challenge.issueRespose method, and then sends the
credentials back in the finishAuthentication method.
user
is not found in the user table.
finishAuthentication
public abstract Token finishAuthentication(Response credentials) throws RemoteException, AuthenticationException
Token for use in
further transactions.
Challenge issued previously.
user fails.
getFile
public abstract RemoteFile getFile(Token token,
File file) throws RemoteException, AuthenticationException, FileTableFullException
RemoteFile instance that represents the file
whose pathname is the given file argument.
null.
user fails.
getFileInputStream
public abstract RemoteFileInputStream getFileInputStream(Token token,
File file) throws IOException, RemoteException, AuthenticationException, PermissionDeniedException
File object.
checkRead method is called with the pathname
of this File argument to see if the
application is allowed read access to the file.
user fails.
getFileOutputStream
public abstract RemoteFileOutputStream getFileOutputStream(Token token,
File file) throws IOException, RemoteException, AuthenticationException, PermissionDeniedException
File object.
checkWrite method is called with the pathname
of the File argument to see if the
application is allowed write access to the file. This may
result in a security exception.
user fails.
getFileOutputStream
public abstract RemoteFileOutputStream getFileOutputStream(Token token,
File file,
boolean append) throws IOException, RemoteException, AuthenticationException, PermissionDeniedException
File object for appending or overwriting.
checkWrite method is called with the pathname
of the File argument to see if the
application is allowed write access to the file. This may
result in a security exception.
user fails.
getRandomAccessFile
public abstract RemoteRandomAccessFile getRandomAccessFile(Token token,
File file,
String mode) throws IOException, RemoteException, AuthenticationException, PermissionDeniedException
File argument.
The mode argument must either be equal to "r" or to
"rw", indicating either to open the file for input,
or for both input and output, respectively.
"r" or to "rw".
checkRead method is called with the pathname
of the File argument to see if the
application is allowed read access to the file. If the
mode argument is equal to "rw", its
checkWrite method also is called with the
pathname to see if the application is allowed write access
to the file.
user fails.
getRootDirectoryName
public abstract String getRootDirectoryName() throws RemoteException
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