/*
* Copyright (c) 2008-2014 the original author or authors.
*
* 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.examples;
import java.io.IOException;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.UnavailableException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletResponse;
import org.cometd.annotation.Configure;
import org.cometd.annotation.Listener;
import org.cometd.annotation.ServerAnnotationProcessor;
import org.cometd.annotation.Service;
import org.cometd.annotation.Session;
import org.cometd.bayeux.Message;
import org.cometd.bayeux.server.BayeuxServer;
import org.cometd.bayeux.server.ConfigurableServerChannel;
import org.cometd.bayeux.server.ServerChannel;
import org.cometd.bayeux.server.ServerMessage;
import org.cometd.bayeux.server.ServerSession;
import org.cometd.server.BayeuxServerImpl;
import org.cometd.server.authorizer.GrantAuthorizer;
import org.cometd.server.ext.AcknowledgedMessagesExtension;
import org.cometd.server.ext.TimesyncExtension;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class CometDDemoServlet extends HttpServlet
{
private static final Logger logger = LoggerFactory.getLogger(CometDDemoServlet.class);
@Override
public void init() throws ServletException
{
super.init();
final BayeuxServerImpl bayeux = (BayeuxServerImpl)getServletContext().getAttribute(BayeuxServer.ATTRIBUTE);
if (bayeux == null)
throw new UnavailableException("No BayeuxServer!");
// Create extensions
bayeux.addExtension(new TimesyncExtension());
bayeux.addExtension(new AcknowledgedMessagesExtension());
// Deny unless granted
bayeux.createChannelIfAbsent("/**", new ServerChannel.Initializer()
{
public void configureChannel(ConfigurableServerChannel channel)
{
channel.addAuthorizer(GrantAuthorizer.GRANT_NONE);
}
});
// Allow anybody to handshake
bayeux.getChannel(ServerChannel.META_HANDSHAKE).addAuthorizer(GrantAuthorizer.GRANT_PUBLISH);
ServerAnnotationProcessor processor = new ServerAnnotationProcessor(bayeux);
processor.process(new EchoRPC());
processor.process(new Monitor());
// processor.process(new ChatService());
bayeux.createChannelIfAbsent("/foo/bar/baz", new ConfigurableServerChannel.Initializer.Persistent());
if (logger.isDebugEnabled())
logger.debug(bayeux.dump());
}
@Override
public void destroy()
{
super.destroy();
}
@Service("echo")
public static class EchoRPC
{
@Session
private ServerSession _session;
@SuppressWarnings("unused")
@Configure("/service/echo")
private void configureEcho(ConfigurableServerChannel channel)
{
channel.addAuthorizer(GrantAuthorizer.GRANT_SUBSCRIBE_PUBLISH);
}
@Listener("/service/echo")
public void doEcho(ServerSession session, ServerMessage message)
{
Map<String, Object> data = message.getDataAsMap();
logger.info("ECHO from " + session + " " + data);
session.deliver(_session, message.getChannel(), data);
}
}
@Service("monitor")
public static class Monitor
{
@Listener("/meta/subscribe")
public void monitorSubscribe(ServerSession session, ServerMessage message)
{
logger.info("Monitored Subscribe from " + session + " for " + message.get(Message.SUBSCRIPTION_FIELD));
}
@Listener("/meta/unsubscribe")
public void monitorUnsubscribe(ServerSession session, ServerMessage message)
{
logger.info("Monitored Unsubscribe from " + session + " for " + message.get(Message.SUBSCRIPTION_FIELD));
}
@Listener("/meta/*")
public void monitorMeta(ServerSession session, ServerMessage message)
{
if (logger.isDebugEnabled())
logger.debug(message.toString());
}
}
public void service(ServletRequest req, ServletResponse res) throws ServletException, IOException
{
((HttpServletResponse)res).sendError(503);
}
}