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.ServiceReference;
022    import com.liferay.registry.ServiceTracker;
023    import com.liferay.registry.ServiceTrackerCustomizer;
024    
025    import javax.servlet.http.HttpServletRequest;
026    import javax.servlet.http.HttpServletResponse;
027    
028    /**
029     * @author Minhchau Dang
030     */
031    public class WebLogicIncludeFilter
032            extends BasePortalFilter implements WrapHttpServletResponseFilter {
033    
034            public WebLogicIncludeFilter() {
035                    Registry registry = RegistryUtil.getRegistry();
036    
037                    _serviceTracker = registry.trackServices(
038                            WebLogicIncludeServletResponseFactory.class,
039                            new WebLogicIncludeServletResponseFactoryTrackerCustomizer());
040    
041                    _serviceTracker.open();
042            }
043    
044            @Override
045            public HttpServletResponse getWrappedHttpServletResponse(
046                    HttpServletRequest request, HttpServletResponse response) {
047    
048                    WebLogicIncludeServletResponseFactory
049                            webLogicIncludeServletResponseFactory =
050                                    _webLogicIncludeServletResponseFactory;
051    
052                    if (webLogicIncludeServletResponseFactory != null) {
053                            return webLogicIncludeServletResponseFactory.create(response);
054                    }
055    
056                    return response;
057            }
058    
059            @Override
060            public boolean isFilterEnabled() {
061                    return _webLogicIncludeServletResponseFactory != null;
062            }
063    
064            private final ServiceTracker
065                    <WebLogicIncludeServletResponseFactory,
066                            WebLogicIncludeServletResponseFactory> _serviceTracker;
067            private volatile WebLogicIncludeServletResponseFactory
068                    _webLogicIncludeServletResponseFactory;
069    
070            private class WebLogicIncludeServletResponseFactoryTrackerCustomizer
071                    implements ServiceTrackerCustomizer
072                            <WebLogicIncludeServletResponseFactory,
073                                    WebLogicIncludeServletResponseFactory> {
074    
075                    @Override
076                    public WebLogicIncludeServletResponseFactory addingService(
077                            ServiceReference<WebLogicIncludeServletResponseFactory>
078                                    serviceReference) {
079    
080                            Registry registry = RegistryUtil.getRegistry();
081    
082                            WebLogicIncludeServletResponseFactory
083                                    webLogicIncludeServletResponseFactory = registry.getService(
084                                            serviceReference);
085    
086                            _webLogicIncludeServletResponseFactory =
087                                    webLogicIncludeServletResponseFactory;
088    
089                            return webLogicIncludeServletResponseFactory;
090                    }
091    
092                    @Override
093                    public void modifiedService(
094                            ServiceReference<WebLogicIncludeServletResponseFactory>
095                                    serviceReference,
096                            WebLogicIncludeServletResponseFactory service) {
097    
098                            removedService(serviceReference, service);
099                            addingService(serviceReference);
100                    }
101    
102                    @Override
103                    public void removedService(
104                            ServiceReference<WebLogicIncludeServletResponseFactory>
105                                    serviceReference,
106                            WebLogicIncludeServletResponseFactory service) {
107    
108                            _webLogicIncludeServletResponseFactory = null;
109                    }
110    
111            }
112    
113    }