/*
 * org.openmicroscopy.shoola.env.init.DataServicesInit
 *
 *------------------------------------------------------------------------------
 *  Copyright (C) 2006 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.
 *
 *------------------------------------------------------------------------------
 */

/*------------------------------------------------------------------------------
 *
 * Written by:    Douglas Creager <dcreager@alum.mit.edu>
 *
 *------------------------------------------------------------------------------
 */


package org.openmicroscopy.shoola.env.init;

//Java imports

//Third-party libraries

//Application-internal dependencies
import org.openmicroscopy.shoola.env.LookupNames;
import org.openmicroscopy.shoola.env.config.Registry;
import org.openmicroscopy.shoola.env.config.RegistryFactory;

import omero.gateway.exception.DSOutOfServiceException;

import org.openmicroscopy.shoola.env.data.DataServicesFactory;
import org.openmicroscopy.shoola.env.data.OmeroImageService;
import org.openmicroscopy.shoola.env.data.views.MonitorFactory;

/** 
 * Creates the {@link org.openmicroscopy.shoola.env.data.OmeroDataService}
 * and links them to the container's {@link Registry}.
 *
 * @author Douglas Creager (dcreager@alum.mit.edu)
 * @version 2.2 <i>(Internal: $Revision$ $Date$)</i>
 * @since OME2.2
 */

public final class DataServicesInit
	extends InitializationTask
{

	/** Constructor required by superclass. */
	public DataServicesInit() {}

	/**
	 * Returns the name of this task.
	 * @see InitializationTask#getName()
	 */
	String getName() { return "Starting data management services"; }

	/** 
	 * Does nothing, as this task requires no set up.
	 * @see InitializationTask#configure()
	 */
	void configure() {}

	/** 
	 * Carries out this task.
	 * @see InitializationTask#execute()
	 */
	void execute()
		throws StartupException
	{
		try {
			//Create services.
			DataServicesFactory 
				factory = DataServicesFactory.getInstance(container);
			//Retrieve them.
			OmeroImageService rds = factory.getIS();
			//Link them to the container's registry.
			Registry reg = container.getRegistry();
			RegistryFactory.linkIS(rds, reg);
            RegistryFactory.linkOS(factory.getOS(), reg);
            RegistryFactory.linkMS(factory.getMS(), reg);
            RegistryFactory.linkAdmin(factory.getAdmin(), reg);
            
            //Finally create and bind the factory used by the async data views
            //to create exec monitors.
            MonitorFactory mf = new MonitorFactory();
            reg.bind(LookupNames.MONITOR_FACTORY, mf);
		} catch (DSOutOfServiceException e) {
			throw new StartupException("Can't connect to OMERO", e);
		} 
	}
	
	/** 
	 * Shuts services down.
	 * @see InitializationTask#rollback()
	 */
	void rollback()
	{
		try {
			DataServicesFactory factory = 
								DataServicesFactory.getInstance(container);
			factory.shutdown(null);	
		} catch (DSOutOfServiceException e) {}	
	}
	
}