/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can obtain
* a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
* or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
* identifying information: "Portions Copyrighted [year]
* [name of copyright owner]"
*
* Contributor(s):
*
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.sun.grizzly.comet;
import com.sun.enterprise.web.connector.grizzly.comet.*;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Simple CometChat.
*
* @author Jeanfrancois Arcand
*/
public class CometServlet extends HttpServlet{
private String contextPath;
static int firstServlet = -1;
public CometServlet() {
}
public void init(ServletConfig config) throws ServletException {
super.init(config);
contextPath = config.getServletContext().getContextPath() + "/chat";
CometEngine cometEngine = CometEngine.getEngine();
CometContext context = cometEngine.register(contextPath);
context.setExpirationDelay(20 * 1000);
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request,response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String action = request.getParameter("action");
CometEngine cometEngine = CometEngine.getEngine();
CometContext cometContext = cometEngine.getCometContext(contextPath);
if (action != null) {
if ("login".equals(action)) {
String username = request.getParameter("username");
request.getSession(true).setAttribute("username", username);
if (firstServlet != -1){
cometContext.notify("User " + username
+ " from " + request.getRemoteAddr()
+ " is joinning the chat.<br/>",CometEvent.NOTIFY,
firstServlet);
}
response.sendRedirect("chat.jsp");
return;
} else if ("post".equals(action)){
String username = (String) request.getSession(true)
.getAttribute("username");
String message = request.getParameter("message");
cometContext.notify("[ " + username + " ] "
+ message + "<br/>");
response.sendRedirect("post.jsp");
return;
} else if ("openchat".equals(action)) {
response.setContentType("text/html");
String username = (String) request.getSession(true)
.getAttribute("username");
response.getWriter().println("<h2>Welcome "
+ username + " </h2>");
CometRequestHandler handler = new CometRequestHandler();
handler.clientIP = request.getRemoteAddr();
handler.attach(response.getWriter());
cometContext.addCometHandler(handler);
return;
} else if ("openchat_admin".equals(action)) {
response.setContentType("text/html");
CometRequestHandler handler = new CometRequestHandler();
handler.attach(response.getWriter());
if (firstServlet == -1){
handler.clientIP = request.getRemoteAddr();
firstServlet = cometContext.addCometHandler(handler);
response.getWriter().println("<h2>Master Chat Window</h2>");
} else {
response.getWriter()
.println("<h2>Moderator already logged</h2>");
}
return;
}
}
}
// --------------------------------------------------------- Async Hook ---/
public class CometRequestHandler implements CometHandler<PrintWriter>{
private PrintWriter printWriter;
public String clientIP;
public void attach(PrintWriter printWriter){
this.printWriter = printWriter;
}
public void onEvent(CometEvent event) throws IOException{
try{
if (firstServlet != -1 && this.hashCode() != firstServlet){
event.getCometContext().notify("User " + clientIP
+ " is getting a new message.<br/>",CometEvent.NOTIFY,
firstServlet);
}
if ( event.getType() != CometEvent.READ ){
printWriter.println(event.attachment());
printWriter.flush();
}
} catch (Throwable t){
t.printStackTrace();
}
}
public void onInitialize(CometEvent event) throws IOException{
printWriter.println("<!doctype html public \"-//w3c//dtd html 4.0 transitional//en\">");
printWriter.println("<html><head><title>Chat</title></head><body bgcolor=\"#FFFFFF\">");
printWriter.flush();
}
public void onTerminate(CometEvent event) throws IOException{
onInterrupt(event);
}
public void onInterrupt(CometEvent event) throws IOException{
if (this.hashCode() == firstServlet) {
firstServlet = -1;
}
printWriter.println("Chat closed<br/>");
printWriter.println("</body></html>");
printWriter.flush();
printWriter.close();
}
}
}
|
