/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2014, 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.mod_cluster;

import org.jboss.as.controller.AttributeDefinition;
import org.jboss.as.controller.OperationContext;
import org.jboss.as.controller.OperationFailedException;
import org.jboss.as.controller.OperationStepHandler;
import org.jboss.as.controller.PathAddress;
import org.jboss.as.controller.ReloadRequiredWriteAttributeHandler;
import org.jboss.as.controller.registry.Resource;
import org.jboss.dmr.ModelNode;

/**
 * A write handler that does not permit configuring both proxy-list and proxies, in which case an
 * {@link OperationFailedException} is thrown. The deprecated proxy-list attribute is kept in the model to be able to
 * support older slave versions (EAP 6.x).
 *
 * @author Radoslav Husar
 * @version Jul 2014
 */
public class ProxyConfigurationWriteAttributeHandler extends ReloadRequiredWriteAttributeHandler {

    public ProxyConfigurationWriteAttributeHandler(AttributeDefinition attribute) {
        super(attribute);
    }

    @Override
    protected void validateUpdatedModel(OperationContext context, Resource model) throws OperationFailedException {

        // Add a new step to validate instead of doing it directly in this method.
        // This allows a composite op to change both attributes and then the
        // validation occurs after both have done their work.

        context.addStep(new OperationStepHandler() {
            @Override
            public void execute(OperationContext context, ModelNode operation) throws OperationFailedException {

                final ModelNode conf = context.readResource(PathAddress.EMPTY_ADDRESS).getModel();
                if ((conf.hasDefined(CommonAttributes.PROXY_LIST) && conf.hasDefined(CommonAttributes.PROXIES))
                        || (context.getProcessType().isServer() && conf.hasDefined(CommonAttributes.PROXY_LIST))) {
                    // That is not supported.
                    throw new OperationFailedException(ModClusterLogger.ROOT_LOGGER.proxyListAttributeUsage());
                }
            }
        }, OperationContext.Stage.MODEL);
    }
}