/*
* 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.wicket.velocity;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
import javax.servlet.ServletContext;
import org.apache.velocity.app.Velocity;
import org.apache.wicket.Application;
import org.apache.wicket.IInitializer;
import org.apache.wicket.WicketRuntimeException;
import org.apache.wicket.protocol.http.WebApplication;
import org.apache.wicket.util.file.WebApplicationPath;
import org.apache.wicket.util.resource.IResourceStream;
import org.apache.wicket.util.resource.ResourceStreamNotFoundException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* An implementation of {@link wicket.IInitializer} for the Velocity Runtime Singleton. If
* Application is an instance of WebApplication, Initializer will retrieve
* "velocityPropertiesFolder" as an initparam to point to the directory the properties file lives
* in, and "velocity.properties" for the name of the properties file. If the params don't exist,
* then velocity.properties next to this class will be loaded.
*
*/
public class Initializer implements IInitializer
{
private static final Logger log = LoggerFactory.getLogger(Initializer.class);
private String velocityPropertiesFile = "velocity.properties";
private String velocityPropertiesFolder;
/**
* @see org.apache.wicket.IInitializer#init(org.apache.wicket.Application)
*/
public void init(Application application)
{
Properties props = getVelocityProperties(application);
try
{
if (null != props)
{
Velocity.init(props);
}
else
{
Velocity.init();
}
log.info("Initialized Velocity successfully");
}
catch (Exception e)
{
throw new WicketRuntimeException(e);
}
}
private Properties getVelocityProperties(Application application)
{
if (application instanceof WebApplication)
{
WebApplication webapp = (WebApplication)application;
ServletContext servletContext = webapp.getServletContext();
ServletContext sc = servletContext;
velocityPropertiesFolder = sc.getInitParameter("velocityPropertiesFolder");
String propsFile = servletContext.getInitParameter("velocity.properties");
if (null != propsFile)
{
velocityPropertiesFile = propsFile;
}
if (null != velocityPropertiesFolder)
{
WebApplicationPath webPath = new WebApplicationPath(sc);
webPath.add(velocityPropertiesFolder);
IResourceStream stream = webPath.find(Initializer.class, velocityPropertiesFile);
InputStream is = null;
try
{
is = stream.getInputStream();
Properties props = new Properties();
props.load(is);
return props;
}
catch (IOException e)
{
throw new WicketRuntimeException(e);
}
catch (ResourceStreamNotFoundException e)
{
throw new WicketRuntimeException(e);
}
finally
{
if (is != null)
{
try
{
is.close();
}
catch (IOException e)
{
log.error(e.getMessage(), e);
}
}
}
}
}
// if it's not a web app, load from the package
InputStream is = Initializer.class.getResourceAsStream("velocity.properties");
try
{
Properties props = new Properties();
props.load(is);
return props;
}
catch (Exception e)
{
throw new WicketRuntimeException(e);
}
finally
{
if (is != null)
{
try
{
is.close();
}
catch (IOException e)
{
log.error(e.getMessage(), e);
}
}
}
}
}