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// Copyright (C) 2009 Red Hat, Inc.
//
// 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
package javax.jnlp;
/**
* The SingleInstanceService provides a way to ensure that only one instance of
* the application is ever running - singleton behavior at the application
* level.
*
*/
public interface SingleInstanceService {
/**
* Adds the specified SingleInstanceListener to the notification list. This
* listener is notified when a new instance of the application is started.
*
*
* @param listener the single instance listener to be added. No action is
* performed if it is null.
*/
void addSingleInstanceListener(SingleInstanceListener listener);
/**
* Removes the specified SingleInstanceListener from the notification list.
* This listener will not be notified if a new instance of the application
* is started.
*
* @param listener the single instance listener to be removed. No action is
* performed if it is null or not in the notification list.
*/
void removeSingleInstanceListener(SingleInstanceListener listener);
}
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