/*
 *
 *  JBoss, Home of Professional Open Source.
 *  Copyright 2013, 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.io;

import static org.jboss.as.controller.descriptions.ModelDescriptionConstants.OP_ADDR;

import java.nio.ByteBuffer;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;

import org.jboss.as.controller.AbstractAddStepHandler;
import org.jboss.as.controller.AttributeDefinition;
import org.jboss.as.controller.OperationContext;
import org.jboss.as.controller.OperationFailedException;
import org.jboss.as.controller.PathAddress;
import org.jboss.as.controller.PersistentResourceDefinition;
import org.jboss.as.controller.ReloadRequiredRemoveStepHandler;
import org.jboss.as.controller.ServiceVerificationHandler;
import org.jboss.as.controller.SimpleAttributeDefinition;
import org.jboss.as.controller.SimpleAttributeDefinitionBuilder;
import org.jboss.dmr.ModelNode;
import org.jboss.dmr.ModelType;
import org.jboss.msc.service.ServiceBuilder;
import org.jboss.msc.service.ServiceController;
import org.xnio.Pool;

/**
 * @author <a href="mailto:tomaz.cerar@redhat.com">Tomaz Cerar</a> (c) 2013 Red Hat Inc.
 */
class BufferPoolResourceDefinition extends PersistentResourceDefinition {

    static final SimpleAttributeDefinition BUFFER_SIZE = new SimpleAttributeDefinitionBuilder(Constants.BUFFER_SIZE, ModelType.INT)
            .setDefaultValue(new ModelNode(1024))
            .build();
    static final SimpleAttributeDefinition BUFFER_PER_SLICE = new SimpleAttributeDefinitionBuilder(Constants.BUFFER_PER_SLICE, ModelType.INT)
            .setDefaultValue(new ModelNode(1024))
            .build();
    static final SimpleAttributeDefinition DIRECT_BUFFERS = new SimpleAttributeDefinitionBuilder(Constants.DIRECT_BUFFERS, ModelType.BOOLEAN, true)
            .setDefaultValue(new ModelNode(true))
            .build();


    /*<buffer-pool name="default" buffer-size="1024" buffers-per-slice="1024"/>*/

    static List<SimpleAttributeDefinition> ATTRIBUTES = Arrays.asList(
            BUFFER_SIZE,
            BUFFER_PER_SLICE,
            DIRECT_BUFFERS
    );


    public static final BufferPoolResourceDefinition INSTANCE = new BufferPoolResourceDefinition();


    private BufferPoolResourceDefinition() {
        super(IOExtension.BUFFER_POOL_PATH,
                IOExtension.getResolver(Constants.BUFFER_POOL),
                new BufferPoolAdd(),
                ReloadRequiredRemoveStepHandler.INSTANCE
        );
    }

    @Override
    public Collection<AttributeDefinition> getAttributes() {
        return (Collection) ATTRIBUTES;
    }

    private static class BufferPoolAdd extends AbstractAddStepHandler {
        @Override
        protected void populateModel(ModelNode operation, ModelNode model) throws OperationFailedException {
            for (AttributeDefinition attr : BufferPoolResourceDefinition.ATTRIBUTES) {
                attr.validateAndSet(operation, model);
            }
        }

        @Override
        protected void performRuntime(OperationContext context, ModelNode operation, ModelNode model, ServiceVerificationHandler verificationHandler, List<ServiceController<?>> newControllers) throws OperationFailedException {
            final PathAddress address = PathAddress.pathAddress(operation.get(OP_ADDR));
            final String name = address.getLastElement().getValue();
            int bufferSize = BUFFER_SIZE.resolveModelAttribute(context, model).asInt();
            int bufferPerSlice = BUFFER_PER_SLICE.resolveModelAttribute(context, model).asInt();
            boolean direct = true;
            ModelNode directBuffersModel = DIRECT_BUFFERS.resolveModelAttribute(context, model);
            if(directBuffersModel.isDefined()) {
                direct = directBuffersModel.asBoolean();
            }

            final BufferPoolService service = new BufferPoolService(bufferSize, bufferPerSlice, direct);
            final ServiceBuilder<Pool<ByteBuffer>> serviceBuilder = context.getServiceTarget().addService(IOServices.BUFFER_POOL.append(name), service);

            serviceBuilder.setInitialMode(ServiceController.Mode.ACTIVE);

            final ServiceController<Pool<ByteBuffer>> serviceController = serviceBuilder.install();
            if (newControllers != null) {
                newControllers.add(serviceController);
            }


        }
    }
}

@@ -2359,32 +2359,70 @@
 odelNode(1024))%0A
+            .setAllowExpression(true)%0A
             .bui
@@ -2419,32 +2419,32 @@
       .build();%0A
-
     static final
@@ -2611,32 +2611,70 @@
 odelNode(1024))%0A
+            .setAllowExpression(true)%0A
             .bui
@@ -2823,24 +2823,24 @@
 LEAN, true)%0A
-
             
@@ -2877,16 +2877,54 @@
 (true))%0A
+            .setAllowExpression(true)%0A
         

Support expressions in the buffer pool