/*
* 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.deltaspike.jsf.impl.config.view;
import org.apache.deltaspike.core.api.config.view.metadata.ConfigDescriptor;
import org.apache.deltaspike.core.api.config.view.metadata.ViewConfigDescriptor;
import org.apache.deltaspike.core.api.config.view.metadata.ViewConfigResolver;
import org.apache.deltaspike.core.api.provider.BeanProvider;
import org.apache.deltaspike.core.spi.activation.ClassDeactivator;
import org.apache.deltaspike.core.spi.activation.Deactivatable;
import org.apache.deltaspike.core.util.ClassDeactivationUtils;
import org.apache.deltaspike.core.util.ExceptionUtils;
import org.apache.deltaspike.jsf.api.config.view.Folder;
import org.apache.deltaspike.jsf.api.config.view.View;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import java.net.MalformedURLException;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
public class ViewConfigPathValidator implements ServletContextListener, Deactivatable
{
private static final Logger LOGGER = Logger.getLogger(ViewConfigPathValidator.class.getName());
@Override
public void contextInitialized(ServletContextEvent sce)
{
if (ClassDeactivationUtils.isActivated(getClass()))
{
ViewConfigResolver viewConfigResolver;
try
{
viewConfigResolver = BeanProvider.getContextualReference(ViewConfigResolver.class);
}
catch (Exception e)
{
LOGGER.log(Level.WARNING, "Container issue detected -> can't validate view-configs. " +
"This exception is usually the effect (but not the reason) of a failed startup. " +
"You can deactivate " + getClass().getName() + " via a custom " +
ClassDeactivator.class.getName() + " to verify it.", e);
return;
}
List<String> supportedExtensions = new ArrayList<String>();
supportedExtensions.add(View.Extension.XHTML);
supportedExtensions.add(View.Extension.JSP);
validateViewConfigPaths(sce, viewConfigResolver, supportedExtensions);
}
}
//allows to test and re-use it in a custom listener
// (if a custom listener is needed for supporting custom extensions or
// this listener is deactivated e.g. to change the order)
protected void validateViewConfigPaths(ServletContextEvent sce,
ViewConfigResolver viewConfigResolver,
List<String> supportedExtensions)
{
for (ConfigDescriptor configDescriptor : viewConfigResolver.getConfigDescriptors())
{
try
{
if (configDescriptor instanceof ViewConfigDescriptor)
{
//currently other extensions aren't supported
String viewId = ((ViewConfigDescriptor) configDescriptor).getViewId();
String extension = viewId.substring(viewId.lastIndexOf('.') + 1);
if (!supportedExtensions.contains(extension))
{
continue;
}
}
if (!isValidPath(sce, configDescriptor))
{
if (configDescriptor instanceof DefaultFolderConfigDescriptor &&
!configDescriptor.getConfigClass().isAnnotationPresent(Folder.class))
{
LOGGER.fine(configDescriptor.getConfigClass().getName() + " looks like a marker interface" +
" only used for providing meta-data, because the path " + configDescriptor.getPath() +
" doesn't exist and the config-class isn't annotated with " + Folder.class.getName());
continue;
}
throw new IllegalStateException("path '" + configDescriptor.getPath() +
"' is missing, but mapped by: " + configDescriptor.getConfigClass().getName());
}
}
catch (Exception e)
{
printException(e);
throw ExceptionUtils.throwAsRuntimeException(e);
}
}
}
protected boolean isValidPath(ServletContextEvent sce, ConfigDescriptor configDescriptor)
{
try
{
return sce.getServletContext().getResource(configDescriptor.getPath()) != null;
}
catch (MalformedURLException e)
{
throw ExceptionUtils.throwAsRuntimeException(e);
}
}
protected void printException(Exception e)
{
//for easier analysis (in combination with several servers)
LOGGER.log(Level.SEVERE, "invalid view-config found", e);
}
@Override
public void contextDestroyed(ServletContextEvent sce)
{
}
}