/*
* org.openmicroscopy.shoola.svc.SvcActivator
*
*------------------------------------------------------------------------------
* Copyright (C) 2006-2014 University of Dundee. All rights reserved.
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*------------------------------------------------------------------------------
*/
package org.openmicroscopy.shoola.svc;
//Java imports
//Third-party libraries
//Application-internal dependencies
/**
* Defines the functionality of a Factory for creating components
* that provide specified services.
*
*
* @author Jean-Marie Burel
* <a href="mailto:j.burel@dundee.ac.uk">j.burel@dundee.ac.uk</a>
* @author Donald MacDonald
* <a href="mailto:donald@lifesci.dundee.ac.uk">donald@lifesci.dundee.ac.uk</a>
* @version 3.0
* @since OME3.0
*/
public interface SvcActivator
{
/**
* Creates or recycles a component that provides the specified service.
* This method should <i>never</i> return <code>null</code>. If the
* specified service can't be instantiated or recycled, then an exception
* should be thrown that details the error.
*
* @param service Specifies which service to activate.
* @return An object implementing the requested service interface.
* @throws Exception If the specified service couldn't be instantiated or
* recycled.
*/
public Object activate(SvcDescriptor service)
throws Exception;
/**
* Cleans up any cached/pooled components and ensures any external resource
* still held by the components is released.
*/
public void deactivate();
}