/*
* org.openmicroscopy.shoola.env.data.views.calls.RenderingControlLoader
*
*------------------------------------------------------------------------------
* 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.
*
*------------------------------------------------------------------------------
*/
package org.openmicroscopy.shoola.env.data.views.calls;
//Java imports
//Third-party libraries
//Application-internal dependencies
import org.openmicroscopy.shoola.env.data.OmeroImageService;
import omero.gateway.SecurityContext;
import omero.gateway.exception.DSOutOfServiceException;
import org.openmicroscopy.shoola.env.data.views.BatchCall;
import org.openmicroscopy.shoola.env.data.views.BatchCallTree;
import org.openmicroscopy.shoola.env.rnd.RenderingControl;
/**
* Command to retrieve the {@link RenderingControl}.
*
* @author Jean-Marie Burel
* <a href="mailto:j.burel@dundee.ac.uk">j.burel@dundee.ac.uk</a>
* @author Andrea Falconi
* <a href="mailto:a.falconi@dundee.ac.uk">a.falconi@dundee.ac.uk</a>
* @author Donald MacDonald
* <a href="mailto:donald@lifesci.dundee.ac.uk">donald@lifesci.dundee.ac.uk</a>
* @version 3.0
* <small>
* (<b>Internal version:</b> $Revision: $ $Date: $)
* </small>
* @since OME2.2
*/
public class RenderingControlLoader
extends BatchCallTree
{
/** Indicates to load the rendering engine. */
public static final int LOAD = 0;
/** Indicates to reload the rendering engine. */
public static final int RELOAD = 1;
/** Indicates to reload the rendering engine. */
public static final int RESET = 2;
/** Indicates to reload the rendering engine. */
public static final int SHUTDOWN = 3;
/** Result of the call. */
private Object result;
/** Loads the specified tree. */
private BatchCall loadCall;
/** The security context.*/
private SecurityContext ctx;
/**
* Creates a {@link BatchCall} to retrieve rendering control.
*
* @param pixelsID The id of the pixels set the rendering control is for.
* @param index Pass <code>true</code> to reload the rendering engine,
* <code>false</code> otherwise.
* @return The {@link BatchCall}.
*/
private BatchCall makeBatchCall(final long pixelsID, final int index)
{
return new BatchCall("Loading rendering control: ") {
public void doCall() throws Exception
{
OmeroImageService rds = context.getImageService();
switch (index) {
default:
case LOAD:
result = rds.loadRenderingControl(ctx, pixelsID);
if (result == null)
throw new DSOutOfServiceException(
"Cannot start the "
+ "rendering engine for pixelsID "
+ pixelsID);
break;
case RELOAD:
result = rds.reloadRenderingService(ctx, pixelsID);
if (result == null)
throw new DSOutOfServiceException(
"Cannot start the "
+ "rendering engine for pixelsID "
+ pixelsID);
break;
case RESET:
result = rds.resetRenderingService(ctx, pixelsID);
break;
case SHUTDOWN:
rds.shutDown(ctx, pixelsID);
}
}
};
}
/**
* Adds the {@link #loadCall} to the computation tree.
*
* @see BatchCallTree#buildTree()
*/
protected void buildTree() { add(loadCall); }
/**
* Returns the {@link RenderingControl}.
*
* @see BatchCallTree#getResult()
*/
protected Object getResult() { return result; }
/**
* Creates a new instance.
* If bad arguments are passed, we throw a runtime exception so to fail
* early and in the caller's thread.
*
* @param ctx The security context.
* @param pixelsID The id of the pixels set the rendering control is for.
* @param index One of the constants defined by this class.
*/
public RenderingControlLoader(SecurityContext ctx, long pixelsID, int index)
{
if (pixelsID < 0)
throw new IllegalArgumentException("ID not valid.");
this.ctx = ctx;
loadCall = makeBatchCall(pixelsID, index);
}
}