/*
* JBoss, Home of Professional Open Source.
* Copyright 2011, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This 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 2.1 of
* the License, or (at your option) any later version.
*
* This software 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 this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.controller.operations.common;
import org.jboss.as.controller.AttributeDefinition;
import org.jboss.as.controller.ControlledProcessState;
import org.jboss.as.controller.OperationContext;
import org.jboss.as.controller.OperationFailedException;
import org.jboss.as.controller.OperationStepHandler;
import org.jboss.as.controller.RunningModeControl;
import org.jboss.as.controller.SimpleAttributeDefinitionBuilder;
import org.jboss.as.controller.descriptions.ModelDescriptionConstants;
import org.jboss.dmr.ModelNode;
import org.jboss.dmr.ModelType;
import org.jboss.msc.service.AbstractServiceListener;
import org.jboss.msc.service.ServiceController;
import org.jboss.msc.service.ServiceName;
/**
* Operation handler for process reloads of servers.
*
* @author <a href="mailto:david.lloyd@redhat.com">David M. Lloyd</a>
* @author Brian Stansberry (c) 2011 Red Hat Inc.
*/
public abstract class ProcessReloadHandler<T extends RunningModeControl> implements OperationStepHandler {
/**
* The operation name.
*/
protected static final String OPERATION_NAME = "reload";
protected static final AttributeDefinition ADMIN_ONLY = new SimpleAttributeDefinitionBuilder(ModelDescriptionConstants.ADMIN_ONLY, ModelType.BOOLEAN, true)
.setDefaultValue(new ModelNode(false)).build();
private final T runningModeControl;
private final ControlledProcessState processState;
private final ServiceName rootService;
public ProcessReloadHandler(final ServiceName rootService, final T runningModeControl,
final ControlledProcessState processState) {
this.rootService = rootService;
this.runningModeControl = runningModeControl;
this.processState = processState;
}
/** {@inheritDoc} */
@Override
public void execute(OperationContext context, ModelNode operation) throws OperationFailedException {
context.addStep(new OperationStepHandler() {
@Override
public void execute(final OperationContext context, final ModelNode operation) throws OperationFailedException {
final ReloadContext<T> reloadContext = initializeReloadContext(context, operation);
final ServiceController<?> service = context.getServiceRegistry(true).getRequiredService(rootService);
context.completeStep(new OperationContext.ResultHandler() {
@Override
public void handleResult(OperationContext.ResultAction resultAction, OperationContext context, ModelNode operation) {
if(resultAction == OperationContext.ResultAction.KEEP) {
service.addListener(new AbstractServiceListener<Object>() {
public void listenerAdded(final ServiceController<?> controller) {
reloadContext.reloadInitiated(runningModeControl);
processState.setStopping();
controller.setMode(ServiceController.Mode.NEVER);
}
public void transition(final ServiceController<? extends Object> controller, final ServiceController.Transition transition) {
if (transition == ServiceController.Transition.STOPPING_to_DOWN) {
controller.removeListener(this);
reloadContext.doReload(runningModeControl);
controller.setMode(ServiceController.Mode.ACTIVE);
}
}
});
}
}
});
}
}, OperationContext.Stage.RUNTIME);
}
protected abstract ReloadContext<T> initializeReloadContext(OperationContext context, ModelNode operation) throws OperationFailedException;
protected interface ReloadContext<T> {
void reloadInitiated(T runningModeControl);
void doReload(T runningModeControl);
}
}