001    /**
002     * Copyright (c) 2000-2012 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.servlet;
016    
017    import com.liferay.portal.kernel.util.AutoResetThreadLocal;
018    
019    import java.io.Closeable;
020    
021    import java.util.Enumeration;
022    
023    import javax.servlet.ServletRequest;
024    import javax.servlet.ServletRequestWrapper;
025    
026    /**
027     * @author Shuyang Zhou
028     */
029    public class ThreadLocalFacadeServletRequestWrapper
030            extends ServletRequestWrapper implements Closeable {
031    
032            public ThreadLocalFacadeServletRequestWrapper(
033                    ServletRequestWrapper servletRequestWrapper,
034                    ServletRequest nextServletRequest) {
035    
036                    super(nextServletRequest);
037    
038                    _servletRequestWrapper = servletRequestWrapper;
039    
040                    _nextServletRequestThreadLocal.set(nextServletRequest);
041            }
042    
043            public void close() {
044                    if (_servletRequestWrapper != null) {
045                            ServletRequest nextServletRequest =
046                                    _nextServletRequestThreadLocal.get();
047    
048                            _servletRequestWrapper.setRequest(nextServletRequest);
049                    }
050            }
051    
052            @Override
053            public Object getAttribute(String name) {
054                    ServletRequest servletRequest = getRequest();
055    
056                    return servletRequest.getAttribute(name);
057            }
058    
059            @Override
060            public Enumeration<String> getAttributeNames() {
061                    ServletRequest servletRequest = getRequest();
062    
063                    return servletRequest.getAttributeNames();
064            }
065    
066            @Override
067            public ServletRequest getRequest() {
068                    return _nextServletRequestThreadLocal.get();
069            }
070    
071            @Override
072            public void removeAttribute(String name) {
073                    ServletRequest servletRequest = getRequest();
074    
075                    servletRequest.removeAttribute(name);
076            }
077    
078            @Override
079            public void setAttribute(String name, Object o) {
080                    ServletRequest servletRequest = getRequest();
081    
082                    servletRequest.setAttribute(name, o);
083            }
084    
085            @Override
086            public void setRequest(ServletRequest servletRequest) {
087                    _nextServletRequestThreadLocal.set(servletRequest);
088            }
089    
090            private static ThreadLocal<ServletRequest> _nextServletRequestThreadLocal =
091                    new AutoResetThreadLocal<ServletRequest>(
092                            ThreadLocalFacadeServletRequestWrapper.class +
093                                    "._nextServletRequestThreadLocal") {
094    
095                            @Override
096                            protected ServletRequest copy(ServletRequest servletRequest) {
097                                    return servletRequest;
098                            }
099    
100                    };
101    
102            private ServletRequestWrapper _servletRequestWrapper;
103    
104    }