edu.jhu.cnds.Frugal
Class FrugalResourceServer

java.lang.Object
  |
  +--java.rmi.server.RemoteObject
        |
        +--java.rmi.server.RemoteServer
              |
              +--java.rmi.server.UnicastRemoteObject
                    |
                    +--edu.jhu.cnds.Frugal.FrugalResourceServer

public class FrugalResourceServer

extends java.rmi.server.UnicastRemoteObject

implements FrugalServiceRemote

A server class, designed to register Frugal Resource implementations with lookup services.

Version:

2.0

Author:

R. Sean Borgstrom

See Also:

Serialized Form

Field Summary

protected net.jini.lookup.JoinManager	isabella Workhorse server class from Sun.
protected net.jini.lease.LeaseRenewalManager	serviceLease LeaseRenewalManager for this class' leases.

Fields inherited from class java.rmi.server.RemoteObject

ref

Constructor Summary

FrugalResourceServer(java.lang.String[] argv)
Loads persistent data, creates an implementation of the Frugal Resource service, and registers it.

Method Summary

void	checkpoint() Saves recent changes to this class' persistent data.
void	dock() Kills the service.
java.lang.Object	getAdmin() Returns an administrative interface for the relevant Frugal Manager.
net.jini.lookup.JoinManager	getIsabella() Returns this class' JoinManager.
java.io.File	getMonument() Returns the persistent storage for this server.
static void	main(java.lang.String[] argv) Starts the server running.
void	setMonument(java.io.File monument) Sets the persistent storage for this server.
protected void	update() Updates the Entries associated with the relevant Frugal Resource every 5 seconds.
static void	usageError() Complains about improper commandline arguments.

Methods inherited from class java.rmi.server.UnicastRemoteObject

clone, exportObject, exportObject, exportObject, unexportObject

Methods inherited from class java.rmi.server.RemoteServer

getClientHost, getLog, setLog

Methods inherited from class java.rmi.server.RemoteObject

equals, getRef, hashCode, toString, toStub

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

serviceLease

protected transient net.jini.lease.LeaseRenewalManager serviceLease

LeaseRenewalManager for this class' leases.

isabella

protected net.jini.lookup.JoinManager isabella

Workhorse server class from Sun.

Constructor Detail

FrugalResourceServer

public FrugalResourceServer(java.lang.String[] argv)
                     throws java.io.IOException,
                            java.lang.ClassNotFoundException

Loads persistent data, creates an implementation of the Frugal Resource service, and registers it.

Parameters:

argv - These should be the same arguments as those passed to main.

Method Detail

main

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

Starts the server running. Invoke with -f [logfile] on the first execution to create the persistent storage logfile and store a unique ID string. Otherwise, invoke with [logfile] to read from persistent storage.

Parameters:

argv - List of command-line argument strings.

usageError

public static void usageError()

Complains about improper commandline arguments.

update

protected void update()
               throws java.io.IOException

Updates the Entries associated with the relevant Frugal Resource every 5 seconds.

dock

public void dock()

Kills the service.

getMonument

public java.io.File getMonument()

Returns the persistent storage for this server.

Returns:

The file where the server stores its ID and other persistent attributes.

setMonument

public void setMonument(java.io.File monument)

Sets the persistent storage for this server.

Parameters:

monument - The new persistent storage location.

getIsabella

public net.jini.lookup.JoinManager getIsabella()

Returns this class' JoinManager.

Returns:

A workhorse class for service registration.

getAdmin

public java.lang.Object getAdmin()
                          throws java.rmi.RemoteException

Returns an administrative interface for the relevant Frugal Manager.

Returns:

An administrative interface for the relevant Frugal Manager.

checkpoint

public void checkpoint()
                throws java.io.IOException,
                       java.lang.ClassNotFoundException

Saves recent changes to this class' persistent data.