// ========================================================================
// Copyright 2007-2008 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// Licensed 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.cometd.oort;
import java.io.IOException;
import javax.servlet.Servlet;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContextAttributeEvent;
import javax.servlet.ServletContextAttributeListener;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.UnavailableException;
import javax.servlet.http.HttpServletResponse;
import org.cometd.Bayeux;
import org.mortbay.cometd.AbstractCometdServlet;
import org.mortbay.log.Log;
/**
* Oort Servlet.
* <p>
* This servlet initializes and configures and instance of the {@link Oort}
* comet cluster manager. The servlet must be initialized after an instance
* of {@link AbstractCometdServlet}, which creates the {@link Bayeux} instance
* used.
* <p>
* The following servlet init parameters are used to configure Oort:<dl>
* <dt>oort.url</dt><dd>The absolute public URL to the cometd servlet.</dd>
* <dt>oort.cloud</dt><dd>A comma separated list of the oort.urls of other
* known oort comet servers that are passed to {@link Oort#observeComet(String)}
* on startup.</dd>
* <dt>oort.channels</dt><dd>A comma separated list of channels that will be
* passed to {@link Oort#observeChannel(String)}</dd>
* </dl>
* @author gregw
*
*/
public class OortServlet implements Servlet
{
private ServletConfig _config;
public void destroy()
{
}
public ServletConfig getServletConfig()
{
return _config;
}
public String getServletInfo()
{
return OortServlet.class.toString();
}
public void init(ServletConfig config) throws ServletException
{
System.err.println("INIT "+config);
_config=config;
Bayeux bayeux = (Bayeux)config.getServletContext().getAttribute(Bayeux.DOJOX_COMETD_BAYEUX);
if (bayeux==null)
{
_config.getServletContext().log("No "+Bayeux.DOJOX_COMETD_BAYEUX+" initialized");
throw new UnavailableException(Bayeux.DOJOX_COMETD_BAYEUX);
}
String url=_config.getInitParameter(Oort.OORT_URL);
if (url==null)
{
_config.getServletContext().log("No "+Oort.OORT_URL+" init parameter");
throw new UnavailableException(Oort.OORT_URL);
}
Oort oort= new Oort(url,bayeux);
_config.getServletContext().setAttribute(Oort.OORT_ATTRIBUTE,oort);
String channels=_config.getInitParameter(Oort.OORT_CHANNELS);
if (channels!=null)
{
String[] patterns=channels.split("[, ]");
for (String channel : patterns)
oort.observeChannel(channel);
}
try
{
oort.start();
}
catch(Exception e)
{
throw new ServletException(e);
}
String cloud = _config.getInitParameter(Oort.OORT_CLOUD);
if (cloud!=null)
{
String[] urls=cloud.split("[, ]");
for (String comet : urls)
oort.observeComet(comet);
}
}
public void service(ServletRequest req, ServletResponse res) throws ServletException, IOException
{
HttpServletResponse response = (HttpServletResponse)res;
response.sendError(503);
}
}