/**
 * Copyright 2005-2010 Noelios Technologies.
 * 
 * The contents of this file are subject to the terms of one of the following
 * open source licenses: LGPL 3.0 or LGPL 2.1 or CDDL 1.0 or EPL 1.0 (the
 * "Licenses"). You can select the license that you prefer but you may not use
 * this file except in compliance with one of these Licenses.
 * 
 * You can obtain a copy of the LGPL 3.0 license at
 * http://www.opensource.org/licenses/lgpl-3.0.html
 * 
 * You can obtain a copy of the LGPL 2.1 license at
 * http://www.opensource.org/licenses/lgpl-2.1.php
 * 
 * You can obtain a copy of the CDDL 1.0 license at
 * http://www.opensource.org/licenses/cddl1.php
 * 
 * You can obtain a copy of the EPL 1.0 license at
 * http://www.opensource.org/licenses/eclipse-1.0.php
 * 
 * See the Licenses for the specific language governing permissions and
 * limitations under the Licenses.
 * 
 * Alternatively, you can obtain a royalty free commercial license with less
 * limitations, transferable or non-transferable, directly at
 * http://www.noelios.com/products/restlet-engine
 * 
 * Restlet is a registered trademark of Noelios Technologies.
 */

package org.restlet.ext.grizzly;

import java.net.InetAddress;

import org.restlet.Server;
import org.restlet.data.Protocol;
import org.restlet.ext.grizzly.internal.HttpParserFilter;

import com.sun.grizzly.Controller;
import com.sun.grizzly.DefaultProtocolChain;
import com.sun.grizzly.DefaultProtocolChainInstanceHandler;
import com.sun.grizzly.ProtocolChain;
import com.sun.grizzly.TCPSelectorHandler;
import com.sun.grizzly.filter.ReadFilter;

/**
 * HTTP connector based on Grizzly.
 * 
 * @author Jerome Louvel
 */
public class HttpServerHelper extends GrizzlyServerHelper {

    /**
     * Constructor.
     * 
     * @param server
     *            The helped server.
     */
    public HttpServerHelper(Server server) {
        super(server);
        getProtocols().add(Protocol.HTTP);
    }

    @Override
    protected void configure(Controller controller) throws Exception {
        // Get the TCP select handler of the controller
        TCPSelectorHandler selectorHandler = getSelectorHandler();

        // Configure it
        selectorHandler.setPort(getHelped().getPort());
        if (getHelped().getAddress() != null) {
            selectorHandler.setInet(InetAddress.getByName(getHelped()
                    .getAddress()));
        }

        // Create the Grizzly filters
        final ReadFilter readFilter = new ReadFilter();
        final HttpParserFilter httpParserFilter = new HttpParserFilter(this);

        // Create the Grizzly controller
        controller
                .setProtocolChainInstanceHandler(new DefaultProtocolChainInstanceHandler() {
                    @Override
                    public ProtocolChain poll() {
                        ProtocolChain protocolChain = this.protocolChains
                                .poll();
                        if (protocolChain == null) {
                            protocolChain = new DefaultProtocolChain();
                            protocolChain.addFilter(readFilter);
                            protocolChain.addFilter(httpParserFilter);
                        }
                        return protocolChain;
                    }
                });
    }

}
