/*
* 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.jetspeed.services.information;
import java.util.Map;
import javax.servlet.ServletConfig;
import javax.servlet.ServletRequest;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import org.apache.pluto.factory.Factory;
import org.apache.pluto.services.information.DynamicInformationProvider;
import org.apache.pluto.services.information.InformationProviderService;
import org.apache.pluto.services.information.StaticInformationProvider;
import org.apache.jetspeed.aggregator.CurrentWorkerContext;
/**
* Factory class for getting Information Provider access
*
* @author <a href="mailto:taylor@apache.org">David Sean Taylor</a>
* @version $Id: InformationProviderServiceImpl.java 587813 2007-10-24 08:20:39Z woonsan $
*/
public class InformationProviderServiceImpl implements Factory, InformationProviderService
{
private javax.servlet.ServletConfig servletConfig;
private final StaticInformationProvider staticInformationProvider;
public InformationProviderServiceImpl(StaticInformationProvider staticInformationProvider, ServletConfig config)
{
this.staticInformationProvider = staticInformationProvider;
}
public void init(ServletConfig config, Map properties) throws Exception
{
// does nothing at all
}
public StaticInformationProvider getStaticProvider()
{
return staticInformationProvider;
}
public DynamicInformationProvider getDynamicProvider(HttpServletRequest request)
{
DynamicInformationProvider provider = null;
boolean isParallel = CurrentWorkerContext.getParallelRenderingMode();
ServletRequest servletRequest = null;
if (isParallel)
{
// request should be an instance of org.apache.jetspeed.engine.servlet.ServletRequestImpl
// unwrap the real request instance provided by the container to synchronize
servletRequest = ((HttpServletRequestWrapper) request).getRequest();
// if it is not an instance of HttpServletRequestWrapper any more, then it is not AdjustedSRTServletRequest instance.
if (servletRequest instanceof HttpServletRequestWrapper)
{
servletRequest = ((HttpServletRequestWrapper) servletRequest).getRequest();
}
synchronized (servletRequest)
{
provider = (DynamicInformationProvider) servletRequest.getAttribute("org.apache.jetspeed.engine.core.DynamicInformationProvider");
}
}
else
{
provider = (DynamicInformationProvider) request.getAttribute("org.apache.jetspeed.engine.core.DynamicInformationProvider");
}
if (provider == null)
{
provider = new DynamicInformationProviderImpl(request, servletConfig);
if (isParallel)
{
synchronized (servletRequest)
{
servletRequest.setAttribute("org.apache.jetspeed.engine.core.DynamicInformationProvider", provider);
}
}
else
{
request.setAttribute("org.apache.jetspeed.engine.core.DynamicInformationProvider", provider);
}
}
return provider;
}
/**
* <p>
* destroy
* </p>
*
* @see org.apache.pluto.factory.Factory#destroy()
* @throws java.lang.Exception
*/
public void destroy() throws Exception
{
// also does nothing
}
}