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/**
* Copyright 2016 [ZTE] and others.
*
* 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.openo.commontosca.catalog.cometd;
import org.cometd.annotation.Listener;
import org.cometd.annotation.ServerAnnotationProcessor;
import org.cometd.annotation.Service;
import org.cometd.bayeux.Message;
import org.cometd.bayeux.server.BayeuxServer;
import org.cometd.bayeux.server.ServerChannel;
import org.cometd.bayeux.server.ServerMessage;
import org.cometd.bayeux.server.ServerSession;
import org.cometd.server.authorizer.GrantAuthorizer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import javax.servlet.GenericServlet;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.UnavailableException;
import javax.servlet.http.HttpServletResponse;
public class CometdServlet extends GenericServlet {
private static final long serialVersionUID = 1L;
private static final Logger logger = LoggerFactory.getLogger(CometdServlet.class);
@Override
public void init() throws ServletException {
super.init();
final BayeuxServer bayeux =
(BayeuxServer) getServletContext().getAttribute(BayeuxServer.ATTRIBUTE);
if (bayeux == null) {
throw new UnavailableException("No BayeuxServer!");
}
// Allow anybody to handshake
bayeux.getChannel(ServerChannel.META_HANDSHAKE).addAuthorizer(GrantAuthorizer.GRANT_PUBLISH);
// start server processor
ServerAnnotationProcessor processor = new ServerAnnotationProcessor(bayeux);
processor.process(new Monitor());
CometdUtil.setBayeuxServer(bayeux);
}
@Override
public void service(ServletRequest paramServletRequest, ServletResponse paramServletResponse)
throws ServletException, IOException {
((HttpServletResponse) paramServletResponse).sendError(503);
}
@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) {
logger.debug(message.toString());
}
}
}
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