apps

Class StorageServerApp

java.lang.Object

apps.Application

apps.ServerApplication

apps.StorageServerApp

public class StorageServerApp
extends ServerApplication

Storage server application.

The storage server application expects three arguments: in order, the local hostname, the hostname of the remote naming server, and the directory that the storage server will use as its local storage for files.

The directory can be given as an absolute or a relative path. The current contents of the directory will be offered to the naming server during registration. Duplicate files in the directory will be deleted, and empty directories will be pruned.

For this reason, it is extremely important that the storage server not be started in a directory containing important files, as those files may be deleted. It is recommended that a special directory be created for each storage server, and the storage server only be started in that directory.

The user under which the storage server is run should have full read and write access to the directory in which the storage server is started.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private class	StorageServerApp.StoppingStorageServer Application storage server.

Nested classes/interfaces inherited from class apps.ServerApplication

ServerApplication.BadUsageException

Field Summary

Fields

Modifier and Type	Field and Description
private static StorageServerApp.StoppingStorageServer	server The storage server itself.

Fields inherited from class apps.Application

EXIT_FAILURE, EXIT_SUCCESS

Constructor Summary

Constructors

Constructor and Description
StorageServerApp()

Method Summary

Modifier and Type	Method and Description
static void	main(java.lang.String[] arguments) Storage server application entry point.
protected java.lang.String	serverType() Returns "storage".
protected void	startServer(java.lang.String[] arguments) Starts the storage server.
protected void	stopServer() Stops the storage server.

Methods inherited from class apps.ServerApplication

run, serverStopped, startTerminationTimer

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

server

private static StorageServerApp.StoppingStorageServer server

The storage server itself.

Constructor Detail

StorageServerApp

public StorageServerApp()

Method Detail

main

public static void main(java.lang.String[] arguments)

Storage server application entry point.

serverType

protected java.lang.String serverType()

Returns "storage".

Specified by:

serverType in class ServerApplication

startServer

protected void startServer(java.lang.String[] arguments)
                    throws ServerApplication.BadUsageException,
                           java.net.UnknownHostException,
                           java.io.FileNotFoundException,
                           RMIException

Starts the storage server.

Specified by:

startServer in class ServerApplication

Parameters:

arguments - The command line arguments.

Throws:

BadUsageException - If there are not three arguments on the command line.

java.net.UnknownHostException - If a storage server stub cannot be created due to an unassigned address.

java.io.FileNotFoundException - If the directory in which the storage server is being started does not exist, or if the path does not refer to a directory.

RMIException - If the storage server cannot be started or the naming server cannot be contacted for registration.

java.lang.IllegalStateException - If a storage server with the same hostname and port number is already registered with the naming server.

ServerApplication.BadUsageException

stopServer

protected void stopServer()

Stops the storage server.

Specified by:

stopServer in class ServerApplication