| /** |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.aries.cdi.extension.el.jsp; |
| |
| import static javax.interceptor.Interceptor.Priority.LIBRARY_AFTER; |
| import static org.osgi.framework.Constants.SERVICE_DESCRIPTION; |
| import static org.osgi.framework.Constants.SERVICE_RANKING; |
| import static org.osgi.framework.Constants.SERVICE_VENDOR; |
| import static org.osgi.namespace.extender.ExtenderNamespace.EXTENDER_NAMESPACE; |
| import static org.osgi.service.cdi.CDIConstants.CDI_CAPABILITY_NAME; |
| import static org.osgi.service.http.whiteboard.HttpWhiteboardConstants.HTTP_WHITEBOARD_CONTEXT_SELECT; |
| import static org.osgi.service.http.whiteboard.HttpWhiteboardConstants.HTTP_WHITEBOARD_LISTENER; |
| |
| import java.util.Collections; |
| import java.util.Dictionary; |
| import java.util.Hashtable; |
| import java.util.List; |
| import java.util.Map; |
| |
| import javax.annotation.Priority; |
| import javax.enterprise.event.Observes; |
| import javax.enterprise.inject.spi.AfterDeploymentValidation; |
| import javax.enterprise.inject.spi.BeanManager; |
| import javax.enterprise.inject.spi.BeforeShutdown; |
| import javax.enterprise.inject.spi.Extension; |
| import javax.servlet.ServletContext; |
| import javax.servlet.ServletContextEvent; |
| import javax.servlet.ServletContextListener; |
| import javax.servlet.jsp.JspApplicationContext; |
| import javax.servlet.jsp.JspFactory; |
| |
| import org.jboss.weld.module.web.el.WeldELContextListener; |
| import org.osgi.framework.Bundle; |
| import org.osgi.framework.ServiceRegistration; |
| import org.osgi.framework.wiring.BundleCapability; |
| import org.osgi.framework.wiring.BundleRequirement; |
| import org.osgi.framework.wiring.BundleWire; |
| import org.osgi.framework.wiring.BundleWiring; |
| |
| public class ELJSPExtension implements Extension { |
| |
| protected ELJSPExtension() { // proxy |
| _bundle = null; |
| } |
| |
| public ELJSPExtension(Bundle bundle) { |
| _bundle = bundle; |
| } |
| |
| void afterDeploymentValidation( |
| @Observes @Priority(LIBRARY_AFTER + 800) |
| AfterDeploymentValidation adv, BeanManager beanManager) { |
| |
| Dictionary<String, Object> properties = new Hashtable<>(); |
| |
| properties.put(SERVICE_DESCRIPTION, "Aries CDI - ELResolver Servlet Context Listener"); |
| properties.put(SERVICE_VENDOR, "Apache Software Foundation"); |
| properties.put(HTTP_WHITEBOARD_CONTEXT_SELECT, getSelectedContext()); |
| properties.put(HTTP_WHITEBOARD_LISTENER, Boolean.TRUE.toString()); |
| properties.put(SERVICE_RANKING, Integer.MAX_VALUE - 100); |
| |
| _registration = _bundle.getBundleContext().registerService( |
| ServletContextListener.class, |
| new ServletContextListener() { |
| @Override |
| public void contextInitialized(ServletContextEvent event) { |
| ServletContext servletContext = event.getServletContext(); |
| |
| JspApplicationContext jspApplicationContext = JspFactory.getDefaultFactory().getJspApplicationContext(servletContext); |
| |
| // Register the ELResolver with JSP |
| jspApplicationContext.addELResolver(beanManager.getELResolver()); |
| |
| // Register ELContextListener with JSP |
| try { |
| jspApplicationContext.addELContextListener(new WeldELContextListener()); |
| } |
| catch (Exception e) { |
| servletContext.log("Failure registering ELContextListener", e); |
| } |
| } |
| |
| @Override |
| public void contextDestroyed(ServletContextEvent event) { |
| // Nothing to do here |
| } |
| }, |
| properties); |
| } |
| |
| void beforeShutdown(@Observes BeforeShutdown bs) { |
| if (_registration != null) { |
| _registration.unregister(); |
| } |
| } |
| |
| private Map<String, Object> getAttributes() { |
| BundleWiring bundleWiring = _bundle.adapt(BundleWiring.class); |
| |
| List<BundleWire> wires = bundleWiring.getRequiredWires(EXTENDER_NAMESPACE); |
| |
| Map<String, Object> cdiAttributes = Collections.emptyMap(); |
| |
| for (BundleWire wire : wires) { |
| BundleCapability capability = wire.getCapability(); |
| Map<String, Object> attributes = capability.getAttributes(); |
| String extender = (String)attributes.get(EXTENDER_NAMESPACE); |
| |
| if (extender.equals(CDI_CAPABILITY_NAME)) { |
| BundleRequirement requirement = wire.getRequirement(); |
| cdiAttributes = requirement.getAttributes(); |
| break; |
| } |
| } |
| |
| return cdiAttributes; |
| } |
| |
| private String getSelectedContext() { |
| if (_contextSelect != null) { |
| return _contextSelect; |
| } |
| |
| return _contextSelect = getSelectedContext0(); |
| } |
| |
| private String getSelectedContext0() { |
| Map<String, Object> attributes = getAttributes(); |
| |
| if (attributes.containsKey(HTTP_WHITEBOARD_CONTEXT_SELECT)) { |
| return (String)attributes.get(HTTP_WHITEBOARD_CONTEXT_SELECT); |
| } |
| |
| Dictionary<String,String> headers = _bundle.getHeaders(); |
| |
| if (headers.get(WEB_CONTEXT_PATH) != null) { |
| return CONTEXT_PATH_PREFIX + headers.get(WEB_CONTEXT_PATH) + ')'; |
| } |
| |
| return DEFAULT_CONTEXT_FILTER; |
| } |
| |
| private static final String CONTEXT_PATH_PREFIX = "(osgi.http.whiteboard.context.path="; |
| private static final String DEFAULT_CONTEXT_FILTER = "(osgi.http.whiteboard.context.name=default)"; |
| private static final String WEB_CONTEXT_PATH = "Web-ContextPath"; |
| |
| private final Bundle _bundle; |
| private String _contextSelect; |
| private ServiceRegistration<?> _registration; |
| |
| } |