/**
* This file is part of CloudML [ http://cloudml.org ]
*
* Copyright (C) 2012 - SINTEF ICT
* Contact: Franck Chauvel <franck.chauvel@sintef.no>
*
* Module: root
*
* CloudML 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 3 of
* the License, or (at your option) any later version.
*
* CloudML 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 CloudML. If not, see
* <http://www.gnu.org/licenses/>.
*/
package org.cloudml.core.actions;
import org.cloudml.core.*;
public class Migrate extends AbstractAction<InternalComponentInstance> {
private final InternalComponentInstance instance;
public Migrate(StandardLibrary library, InternalComponentInstance instance) {
super(library);
this.instance = rejectIfInvalid(instance);
}
private InternalComponentInstance rejectIfInvalid(InternalComponentInstance instance) {
if (instance == null) {
throw new IllegalArgumentException("'null' is not a valid instance for migration!");
}
return instance;
}
@Override
public InternalComponentInstance applyTo(Deployment deployment) {
final ComponentInstance<? extends Component> newHost = getLibrary().findAlternativeDestinationFor(deployment, instance);
final ExecuteInstance execution = deployment.getExecuteInstances().withSubject(instance);
assert execution != null:
String.format("There should be an execute instance whose required end points to '%s'", instance.getName());
deployment.getExecuteInstances().remove(execution);
deployment.deploy(instance, newHost);
return instance;
}
}