/*
* JBoss, Home of Professional Open Source.
* Copyright 2015, 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.wildfly.extension.clustering.singleton.deployment;
import org.jboss.as.server.deployment.AttachmentKey;
import org.jboss.as.server.deployment.Attachments;
import org.jboss.as.server.deployment.DeploymentPhaseContext;
import org.jboss.as.server.deployment.DeploymentUnit;
import org.jboss.as.server.deployment.DeploymentUnitProcessingException;
import org.jboss.as.server.deployment.DeploymentUnitProcessor;
import org.jboss.msc.service.AbstractServiceListener;
import org.jboss.msc.service.ServiceController;
import org.jboss.msc.service.ServiceController.Mode;
import org.wildfly.clustering.singleton.SingletonPolicy;
import org.wildfly.extension.clustering.singleton.SingletonLogger;
/**
* DUP that attaches the singleton DeploymentUnitPhaseBuilder if a deployment policy is attached.
* @author Paul Ferraro
*/
public class SingletonDeploymentProcessor implements DeploymentUnitProcessor {
public static final AttachmentKey<SingletonPolicy> POLICY_KEY = AttachmentKey.create(SingletonPolicy.class);
@Override
public void deploy(DeploymentPhaseContext context) throws DeploymentUnitProcessingException {
DeploymentUnit unit = context.getDeploymentUnit();
if (unit.getParent() == null) {
SingletonPolicy policy = context.getAttachment(POLICY_KEY);
if (policy != null) {
// Ideally, we would just install the next phase using the singleton policy, however deployment unit phases do not currently support restarts
// Restart the deployment using the attached phase builder, but only if a builder was not already attached
if (unit.putAttachment(Attachments.DEPLOYMENT_UNIT_PHASE_BUILDER, new SingletonDeploymentUnitPhaseBuilder(policy)) == null) {
SingletonLogger.ROOT_LOGGER.singletonDeploymentDetected(policy);
ServiceController<?> controller = context.getServiceRegistry().getRequiredService(unit.getServiceName());
controller.addListener(new AbstractServiceListener<Object>() {
@Override
public void transition(final ServiceController<?> controller, final ServiceController.Transition transition) {
if(transition.getAfter().equals(ServiceController.Substate.DOWN)) {
controller.setMode(Mode.ACTIVE);
controller.removeListener(this);
}
}
});
controller.setMode(Mode.NEVER);
}
}
}
}
@Override
public void undeploy(DeploymentUnit unit) {
// We intentionally leave any DEPLOYMENT_UNIT_PHASE_BUILDER attached to the deployment unit
}
}