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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.tuscany.sca.binding.comet.runtime;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.LinkedList;
import java.util.List;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.runtime.RuntimeEndpoint;
import org.atmosphere.cpr.BroadcastFilter;
import org.atmosphere.cpr.Broadcaster.SCOPE;
import org.atmosphere.cpr.Meteor;
import org.atmosphere.util.XSSHtmlFilter;
public class CometServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private static final String METEOR_KEY = "org.apache.tuscany.comet.meteor";
protected transient RuntimeEndpoint wire;
protected transient Operation operation;
private List<BroadcastFilter> filters;
@Override
public void init(ServletConfig config) throws ServletException {
System.out.println("Entering CometServlet#init...");
super.init(config);
filters = new LinkedList<BroadcastFilter>();
filters.add(new XSSHtmlFilter());
filters.add(new ScriptFilter());
}
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
System.out.println("Entering CometServlet#doGet...");
Meteor meteor = Meteor.build(req, SCOPE.REQUEST, filters, null);
meteor.addListener(new EventsLogger());
req.getSession().setAttribute(METEOR_KEY, meteor);
resp.setContentType("text/html");
meteor.suspend(-1);
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
System.out.println("Entering CometServlet#doPost...");
System.out.println("Getting attributes from servlet context...");
this.wire = (RuntimeEndpoint)getServletContext().getAttribute("org.apache.tuscany.sca.binding.comet.endpoint");
this.operation = (Operation)getServletContext().getAttribute("org.apache.tuscany.sca.binding.comet.operation");
System.out.println("Getting Meteor...");
Meteor meteor = (Meteor)req.getSession().getAttribute(METEOR_KEY);
meteor.broadcast(invokeService(new Object[] {}));
}
protected Object invokeService(Object[] args) {
try {
return wire.invoke(operation, args);
} catch (InvocationTargetException e) {
throw new RuntimeException(e);
}
}
}
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