hello,
I have posted twice this month a help message on the problem I am having. I
guess I was unclear in my problem desc, because I got no answer. This is a
technical problem related to the ded list, but maybe some user will have
experienced the same.
I have a running turbine application, with a classical Screen -> Actions ->
Templates flow.
I would like to make a portlet to plug that application into a jetspeed
portal.
Therefore, I must modify the VelocityPortlet class that I find in the last
Turbine CVS. (enclosed in that mail my source code)
I must modify this class, because otherwise my screens ( java classes ) are
not getting called when the portlet is invoked. Only the .vm files are
called in the current version.
The problem I have is that my first screen inherits from
VelocitySecureScreen, and in the method isAuthorized, I have the following:
boolean isAuthorized = false;
AccessControlList acl = data.getACL();
if (acl == null)
{
String previousTemplate = data.getScreenTemplate();
// System.out.println("screen template: " +
previousTemplate);
data.getSession().setAttribute(UI_KEY, previousTemplate);
data.setScreenTemplate("Login.vm");
return false;
} else
{
return true;
}
So, if the user is not logged in, I redirect the user toward a login
screen. This causes an exception, and, moreover, I receive an exception
because the Turbine engine doesn't find the default.vm layout template...
I think I have made some mistakes in the usage of the turbine framework, as
default.vm jetspeed layout exists...
Could someone that understands how jetspeed work tell me what I can and
what I cannot do with the Turbine API's, in the VelocityPortlet?
thanks a lot,
Stan.
Stanislas Pinte
Computer Consultant
/* ====================================================================
* The Apache Software License, Version 1.1
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* modification, are permitted provided that the following conditions
* are met:
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* if and wherever such third-party acknowledgments normally appear.
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* 4. The names "Apache" and "Apache Software Foundation" and
* "Apache Jetspeed" must not be used to endorse or promote products
* derived from this software without prior written permission. For
* written permission, please contact [EMAIL PROTECTED]
*
* 5. Products derived from this software may not be called "Apache" or
* "Apache Jetspeed", nor may "Apache" appear in their name, without
* prior written permission of the Apache Software Foundation.
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* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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*
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* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.jetspeed.portal.portlets;
// Turbine stuff
import org.apache.turbine.util.RunData;
import org.apache.turbine.services.velocity.TurbineVelocity;
import org.apache.turbine.services.pull.TurbinePull;
import org.apache.turbine.modules.ActionLoader;
import org.apache.turbine.modules.ScreenLoader;
// Jetspeed stuff
import org.apache.jetspeed.portal.Portlet;
import org.apache.jetspeed.portal.portlets.AbstractPortlet;
import org.apache.jetspeed.portal.PortletException;
import org.apache.jetspeed.services.TemplateLocator;
import org.apache.turbine.modules.Screen;
// Ecs stuff
import org.apache.ecs.ConcreteElement;
import org.apache.ecs.StringElement;
// Velocity Stuff
import org.apache.velocity.context.Context;
import org.apache.turbine.util.Log;
/**
* A Velocity based portlet implementation
*
* @author <a href="mailto:[EMAIL PROTECTED]";>Roberto Carrasco</a>
* @author <a href="mailto:[EMAIL PROTECTED]";>Rapha�l Luta</a>
*/
public class VelocityPortlet extends AbstractPortlet
{
/**
By default the data is non cacheable
*/
public void init( ) throws PortletException
{
setCacheable( false );
}
public ConcreteElement getContent( RunData rundata )
{
//to remove...
System.out.println("honey!!!!!!!!!!!!!!!!!!");
// create a blank context and with all the global application
// Pull Tools inside
Context context = TurbineVelocity.getContext();
context.put( "data", rundata );
context.put( "portlet", this );
context.put( "conf", this.getPortletConfig() );
context.put( "skin", this.getPortletConfig().getPortletSkin() );
String template = getPortletConfig().getInitParameter("template");
if (template != null)
{
context.put("template",template);
}
// Put the request and session based contexts
TurbinePull.populateContext(context, rundata);
String actionName = getPortletConfig().getInitParameter("action");
//invoke the required action
if (actionName != null)
{
// store the context so that the action can retrieve it
Log.debug("VelocityPortlet found action "+actionName+" context "+context);
rundata.getTemplateInfo().setTemplateContext( "VelocityPortletContext",
context );
// if there is an action with the same name in modules/actions/portlets
exec it
try
{
ActionLoader.getInstance().exec( rundata, actionName );
}
catch( Exception e)
{
Log.error( e.toString() );
}
}
//either the action selected the template, or use the default template
// defined in the registry
//If the context is not defined, I can try to invoke a turbine screen.
//NOPE...in Turbine, I can have a vm template and a screen!
//Anyway, the template entry cannot be null!!!!
//I test that and log the error if found...
if (context.get("template") == null)
{
Log.error( "invoking a Velocity template without having defined a
\"template\" parameter!" );
}
//NOTE: it is possible that no screen got defined for that template
//so we should be careful.
//the screen name is the template name minus the ".vm"...
String screenName = null;
if (-1 != template.indexOf(".vm"))
{
screenName = template.substring(0, template.length()-3);
} else
{
screenName = template;
}
System.out.println("screen name: " + screenName);
try
{
//I am not sure exec is the right method to call...I may not want
//Turbine to take care of layout issues, as I want to let Jetspeed do
that for me.
ScreenLoader.getInstance().exec( rundata, screenName );
}
catch( Exception e)
{
e.printStackTrace();
Log.error( e.toString() );
}
// generate the content
String s = null;
try
{
if (-1 == template.indexOf(".vm"))
template = template + ".vm";
System.out.println("template: " + template);
String templatePath = TemplateLocator.locatePortletTemplate(rundata,
template);
System.out.println("template Path: " + templatePath);
//The turbine velocity service expects an absolute file name,
//and the TemplateLocator returns a relative one...
s = TurbineVelocity.handleRequest(context, templatePath);
}
catch( Exception e)
{
s= e.toString();
}
TurbineVelocity.requestFinished(context);
if (s == null) s = "";
return new StringElement( s );
}
}
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