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/*
 * 
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright 2007-2008 Sun Microsystems, Inc. All rights reserved.
 * 
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 * 
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
 * identifying information: "Portions Copyrighted [year]
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 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
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 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
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package com.sun.grizzly.http;

import com.sun.grizzly.Context;
import com.sun.grizzly.DefaultProtocolChain;
import com.sun.grizzly.rcm.ResourceAllocationFilter;
import com.sun.grizzly.util.WorkerThread;
import java.nio.ByteBuffer;

/**
 * Customized implementation of a {@link ProtocolChain}
 * @author Jeanfrancois Arcand
 */
public class HttpProtocolChain extends DefaultProtocolChain {

    // is RCM enabled.
    private boolean rcmSupport = false;

    /**
     * Execute the request. When RCM is enabled, swicth the {@link ByteBuffer}
     * based on the decision made by a {@link ResourceAllocationFilter}
     * @param ctx
     * @throws java.lang.Exception
     */
    @Override
    public void execute(Context ctx) throws Exception {
        if (rcmSupport) {
            ByteBuffer byteBuffer =
                    (ByteBuffer) ctx.getAttribute(ResourceAllocationFilter.BYTE_BUFFER);
            // Switch ByteBuffer
            if (byteBuffer != null) {
                ((WorkerThread) Thread.currentThread()).setByteBuffer(byteBuffer);
            }

            if (protocolFilters.size() != 0) {
                int currentPosition = super.executeProtocolFilter(ctx);
                super.postExecuteProtocolFilter(currentPosition, ctx);
            }
        } else {
            super.execute(ctx);
        }
    }

    /**
     * Enable/Disable RCM.
     * @param rcmSupport
     */
    public void enableRCM(boolean rcmSupport) {
        this.rcmSupport = rcmSupport;
    }
}




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