/* | |
* Licensed to the Apache Software Foundation (ASF) under one | |
* or more contributor license agreements. See the NOTICE file | |
* distributed with this work for additional information | |
* regarding copyright ownership. The ASF licenses this file | |
* to you 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.empire.jsf2.app; | |
import javax.faces.application.Application; | |
import javax.faces.context.FacesContext; | |
import javax.faces.event.AbortProcessingException; | |
import javax.faces.event.PostConstructApplicationEvent; | |
import javax.faces.event.PreDestroyApplicationEvent; | |
import javax.faces.event.SystemEvent; | |
import javax.faces.event.SystemEventListener; | |
import javax.servlet.ServletContext; | |
import org.apache.empire.jsf2.impl.FacesImplementation; | |
import org.apache.empire.jsf2.impl.MojarraImplementation; | |
import org.apache.empire.jsf2.impl.MyFacesImplementation; | |
import org.slf4j.Logger; | |
import org.slf4j.LoggerFactory; | |
public class WebAppStartupListener implements SystemEventListener | |
{ | |
private static final Logger log = LoggerFactory.getLogger(WebAppStartupListener.class); | |
@Override | |
public boolean isListenerForSource(Object source) | |
{ | |
return (source instanceof Application); | |
} | |
@Override | |
public void processEvent(SystemEvent event) | |
throws AbortProcessingException | |
{ | |
log.info("ApplicationStartupListener:processEvent"); | |
if (event instanceof PostConstructApplicationEvent) | |
{ | |
FacesContext startupContext = FacesContext.getCurrentInstance(); | |
// detect implementation | |
FacesImplementation facesImplementation = detectFacesImplementation(); | |
Object app = facesImplementation.getManagedBean(WebApplication.APPLICATION_BEAN_NAME, startupContext); | |
if (!(app instanceof WebApplication)) | |
throw new AbortProcessingException("Error: Application is not a "+WebApplication.class.getName()+" instance. Please create a ApplicationFactory!"); | |
// Create and Init application | |
WebApplication facesApp = (WebApplication)app; | |
facesApp.init(facesImplementation, startupContext); | |
// Set Servlet Attribute | |
ServletContext servletContext = (ServletContext) startupContext.getExternalContext().getContext(); | |
if (servletContext.getAttribute(WebApplication.APPLICATION_BEAN_NAME)!=facesApp) | |
{ | |
log.warn("WARNING: Ambiguous application definition. An object of name '{}' already exists on application scope!", WebApplication.APPLICATION_BEAN_NAME); | |
} | |
} | |
else if (event instanceof PreDestroyApplicationEvent) | |
{ | |
log.info("Processing PreDestroyApplicationEvent"); | |
} | |
} | |
/** | |
* Detects the JSF Implementation and returns an implmentation handler class. | |
* Supported Implementations are Sun Mojarra (2.2.x) and Apache MyFaces (2.2.x) | |
* @return | |
*/ | |
protected FacesImplementation detectFacesImplementation() | |
{ | |
log.debug("Detecting JSF-Implementation..."); | |
// Test for Apache MyFaces | |
try { | |
Class.forName("org.apache.myfaces.application.ApplicationFactoryImpl"); | |
return new MyFacesImplementation(); | |
} catch (ClassNotFoundException e) { | |
// It's not MyFaces | |
} | |
// Test for Sun Mojarra | |
try { | |
Class.forName("com.sun.faces.application.ApplicationFactoryImpl"); | |
return new MojarraImplementation(); | |
} catch (ClassNotFoundException e) { | |
// It's not Mojarra | |
} | |
// Not found | |
log.error("JSF-Implementation missing or unknown. Please make sure either Apache MyFaces or Sun Mojarra implementation is provided"); | |
throw new UnsupportedOperationException(); | |
} | |
} |