/******************************************************************************
* JBoss, a division of Red Hat *
* Copyright 2008, Red Hat Middleware, LLC, and individual *
* contributors as indicated by the @authors tag. See the *
* copyright.txt in the distribution for a full listing of *
* individual contributors. *
* *
* This is free software; you can redistribute it and/or modify it *
* under the terms of the GNU Lesser General Public License as *
* published by the Free Software Foundation; either version 2.1 of *
* the License, or (at your option) any later version. *
* *
* This software is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this software; if not, write to the Free *
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA *
* 02110-1301 USA, or see the FSF site: http://www.fsf.org. *
******************************************************************************/
package org.gatein.pc.samples.basic;
import javax.portlet.GenericPortlet;
import javax.portlet.ActionRequest;
import javax.portlet.ActionResponse;
import javax.portlet.PortletException;
import javax.portlet.EventRequest;
import javax.portlet.EventResponse;
import javax.portlet.RenderRequest;
import javax.portlet.RenderResponse;
import javax.portlet.PortletURL;
import javax.portlet.Event;
import javax.portlet.StateAwareResponse;
import javax.xml.namespace.QName;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Random;
/**
* @author <a href="mailto:julien@jboss-portal.org">Julien Viet</a>
* @version $Revision: 630 $
*/
public class RandomEventPortlet extends GenericPortlet
{
/** . */
private static final QName[] QNAMES = {
new QName("urn:jboss:portal:samples:basic", "Event1"),
new QName("urn:jboss:portal:samples:basic", "Event2"),
new QName("urn:jboss:portal:samples:basic", "Event3")
};
/** . */
private static final String[] PARAM_NAMES = {
"foo", "bar", "juu", "daa", "zee"
};
/** . */
private static final String[] PARAM_VALUES = {
"red", "green", "blue", "yellow", "white", "black"
};
/** . */
private static final Random random = new Random();
private static QName pickQName()
{
return pickValue(QNAMES);
}
private static <T> T pickValue(T[] values)
{
synchronized (random)
{
return values[random.nextInt(values.length)];
}
}
private static boolean shouldFail()
{
synchronized (random)
{
return random.nextInt(3) == 0;
}
}
public void processAction(ActionRequest req, ActionResponse resp) throws PortletException, IOException
{
int repeat = Integer.parseInt(req.getParameter("repeat"));
//
publishState(resp, repeat);
}
public void processEvent(EventRequest req, EventResponse resp) throws PortletException, IOException
{
Event event = req.getEvent();
//
int repeat = ((Integer)event.getValue());
String name = event.getName();
System.out.println("Portlet " + getPortletConfig().getPortletName() + " received the event (" + name + "," + repeat + ")");
//
if (shouldFail())
{
System.out.println("Portlet " + getPortletConfig().getPortletName() + " decided to fail");
//
throw new PortletException("Don't be scarred, this is expected to happen");
}
//
publishState(resp, repeat - 1);
}
private void publishState(StateAwareResponse resp, int repeat)
{
if (repeat > 0)
{
QName name = pickQName();
resp.setEvent(name, repeat);
//
resp.setRenderParameter(pickValue(PARAM_NAMES), pickValue(PARAM_VALUES));
//
System.out.println("Portlet " + getPortletConfig().getPortletName() + " generated the event (" + name + "," + repeat + ")");
}
}
public void render(RenderRequest req, RenderResponse resp) throws PortletException, IOException
{
PortletURL actionURL = resp.createActionURL();
//
PrintWriter writer = resp.getWriter();
//
writer.println("<p>The random event portlet generates and consumes randomly generated events during the event " +
"phase of a portlet. It is used to show a complex eventing scenario and how the event debugger portlet " +
"can be useful to understand how the events were distributed during the event phase.</p>");
//
writer.println("<p><form action=\"" + actionURL + "\" method=\"post\">");
writer.println("Number maximum of event phases: <input type=\"text\" name=\"repeat\" value=\"3\"/>");
writer.println("<input type=\"submit\"/>");
writer.println("</form></p>");
}
}