/*
 * 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.threads;



import java.util.concurrent.TimeUnit;

import org.jboss.as.controller.OperationContext;
import org.jboss.as.controller.OperationFailedException;
import org.jboss.as.controller.capability.RuntimeCapability;
import org.jboss.dmr.ModelNode;
import org.jboss.msc.service.ServiceController;
import org.jboss.msc.service.ServiceName;


/**
 * Handles attribute writes for a queueless thread pool.
 *
 * @author Alexey Loubyansky
 */
public class QueuelessThreadPoolWriteAttributeHandler extends ThreadsWriteAttributeOperationHandler {

    private final ServiceName serviceNameBase;
    private final RuntimeCapability capability;

    public QueuelessThreadPoolWriteAttributeHandler(boolean blocking, final RuntimeCapability capability, ServiceName serviceNameBase) {
        super(blocking ? QueuelessThreadPoolAdd.BLOCKING_ATTRIBUTES : QueuelessThreadPoolAdd.NON_BLOCKING_ATTRIBUTES, QueuelessThreadPoolAdd.RW_ATTRIBUTES);
        this.serviceNameBase = serviceNameBase;
        this.capability = capability;
    }

    @Override
    protected void applyOperation(final OperationContext context, ModelNode model, String attributeName,
                                  ServiceController<?> service, boolean forRollback) throws OperationFailedException {

        final QueuelessThreadPoolService pool =  (QueuelessThreadPoolService) service.getService();

        if (PoolAttributeDefinitions.KEEPALIVE_TIME.getName().equals(attributeName)) {
            TimeUnit defaultUnit = pool.getKeepAliveUnit();
            final TimeSpec spec = getTimeSpec(context, model, defaultUnit);
            pool.setKeepAlive(spec);
        } else if(PoolAttributeDefinitions.MAX_THREADS.getName().equals(attributeName)) {
            pool.setMaxThreads(PoolAttributeDefinitions.MAX_THREADS.resolveModelAttribute(context, model).asInt());
        } else if (!forRollback) {
            // Programming bug. Throw a RuntimeException, not OFE, as this is not a client error
            throw ThreadsLogger.ROOT_LOGGER.unsupportedQueuelessThreadPoolAttribute(attributeName);
        }
    }

    @Override
    protected ServiceController<?> getService(final OperationContext context, final ModelNode model) throws OperationFailedException {
        final String name = context.getCurrentAddressValue();
        ServiceName serviceName = null;
        ServiceController<?> controller = null;
        if(capability != null) {
            serviceName = capability.getCapabilityServiceName(context.getCurrentAddress());
            controller = context.getServiceRegistry(true).getService(serviceName);
            if(controller != null) {
                return controller;
            }
        }
        if (serviceNameBase != null) {
            serviceName = serviceNameBase.append(name);
            controller = context.getServiceRegistry(true).getService(serviceName);
        }
        if(controller == null) {
            throw ThreadsLogger.ROOT_LOGGER.queuelessThreadPoolServiceNotFound(serviceName);
        }
        return controller;
    }
}
