001    /**
002     * Copyright (c) 2000-present 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.filters.weblogic;
016    
017    import com.liferay.portal.kernel.servlet.WrapHttpServletResponseFilter;
018    import com.liferay.portal.servlet.filters.BasePortalFilter;
019    import com.liferay.registry.Registry;
020    import com.liferay.registry.RegistryUtil;
021    import com.liferay.registry.ServiceTracker;
022    
023    import javax.servlet.http.HttpServletRequest;
024    import javax.servlet.http.HttpServletResponse;
025    
026    /**
027     * @author Minhchau Dang
028     */
029    public class WebLogicIncludeFilter
030            extends BasePortalFilter implements WrapHttpServletResponseFilter {
031    
032            public WebLogicIncludeFilter() {
033                    Registry registry = RegistryUtil.getRegistry();
034    
035                    _serviceTracker = registry.trackServices(
036                            WebLogicIncludeServletResponseFactory.class);
037    
038                    _serviceTracker.open();
039            }
040    
041            @Override
042            public void destroy() {
043                    _serviceTracker.close();
044    
045                    super.destroy();
046            }
047    
048            @Override
049            public HttpServletResponse getWrappedHttpServletResponse(
050                    HttpServletRequest request, HttpServletResponse response) {
051    
052                    WebLogicIncludeServletResponseFactory
053                            webLogicIncludeServletResponseFactory =
054                                    _serviceTracker.getService();
055    
056                    if (webLogicIncludeServletResponseFactory != null) {
057                            return webLogicIncludeServletResponseFactory.create(response);
058                    }
059    
060                    return response;
061            }
062    
063            @Override
064            public boolean isFilterEnabled() {
065                    return !_serviceTracker.isEmpty();
066            }
067    
068            private final ServiceTracker
069                    <WebLogicIncludeServletResponseFactory,
070                            WebLogicIncludeServletResponseFactory> _serviceTracker;
071    
072    }