/**
* 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 java.util.ArrayList;
import java.util.List;
import org.cloudml.core.*;
import org.cloudml.core.collections.InternalComponentInstanceGroup;
public class Uninstall extends AbstractAction<Void> {
private final InternalComponentInstance artefactInstance;
public Uninstall(StandardLibrary library, InternalComponentInstance artefactInstance) {
super(library);
this.artefactInstance = artefactInstance;
}
@Override
public Void applyTo(Deployment deployment) {
if (artefactInstance.canHost()) {
migrateAllHostedComponents(deployment);
}
disconnectRequiredPorts(deployment);
List<RequiredPortInstance> pendingClients = disconnectProvidedPorts(deployment);
shutdownInternalComponentInstance(deployment);
reconnectClientsWithAlternativeServer(pendingClients, deployment);
return NOTHING;
}
private void migrateAllHostedComponents(Deployment deployment) {
final InternalComponentInstanceGroup hosted = deployment.getComponentInstances().onlyInternals().hostedOn(artefactInstance);
for (InternalComponentInstance hostedComponent: hosted) {
getLibrary().migrate(deployment, hostedComponent);
}
}
private void disconnectRequiredPorts(Deployment deployment) {
for (RequiredPortInstance clientPort: artefactInstance.getRequiredPorts()) {
if (clientPort.isBound()) {
final ComponentInstance<? extends Component> server = clientPort.findProvider();
getLibrary().unbind(deployment, clientPort);
if (server.canBeUninstalled()) {
getLibrary().uninstall(deployment, (InternalComponentInstance) server);
}
}
}
}
private List<RequiredPortInstance> disconnectProvidedPorts(Deployment deployment) {
final List<RequiredPortInstance> customerToBeRebound = new ArrayList<RequiredPortInstance>();
for (ProvidedPortInstance serverPort: artefactInstance.getProvidedPorts()) {
if (serverPort.isBound()) {
customerToBeRebound.addAll(serverPort.findClients());
getLibrary().unbind(deployment, serverPort);
}
}
return customerToBeRebound;
}
private void reconnectClientsWithAlternativeServer(List<RequiredPortInstance> customerToBeRebound, Deployment target) {
for (RequiredPortInstance clientPort: customerToBeRebound) {
getLibrary().bind(target, clientPort);
}
}
private void shutdownInternalComponentInstance(Deployment target) {
getLibrary().stop(target, artefactInstance);
final ExecuteInstance execution = target.getExecuteInstances().withSubject(artefactInstance);
assert execution != null:
String.format("There should be an execute instance whose required end points to '%s'", artefactInstance.getName());
target.getExecuteInstances().remove(execution);
target.getComponentInstances().remove(artefactInstance);
}
}