org.atmosphere.container.GlassFishv2CometSupport Maven / Gradle / Ivy
/*
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 2007-2008 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 org.atmosphere.container;
import com.sun.enterprise.web.connector.grizzly.comet.CometContext;
import com.sun.enterprise.web.connector.grizzly.comet.CometEngine;
import com.sun.enterprise.web.connector.grizzly.comet.CometEvent;
import com.sun.enterprise.web.connector.grizzly.comet.CometHandler;
import org.atmosphere.cpr.AsynchronousProcessor;
import org.atmosphere.cpr.AtmosphereResource;
import org.atmosphere.cpr.AtmosphereResourceImpl;
import org.atmosphere.cpr.AtmosphereServlet.Action;
import org.atmosphere.cpr.AtmosphereServlet.AtmosphereConfig;
import org.atmosphere.cpr.CometSupport;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.logging.Level;
/**
* Comet Portable Runtime implementation on top of Grizzly API included
* with GlassFish v2.
*
* @author Jeanfrancois Arcand
*/
public class GlassFishv2CometSupport extends AsynchronousProcessor implements CometSupport {
private final static String ATMOSPHERE = "/atmosphere";
private String atmosphereCtx = "";
public GlassFishv2CometSupport(AtmosphereConfig config){
super(config);
}
/**
* Init Grizzly's {@link CometContext} that will be used to suspend and
* resume the response.
* @param sc the {@link ServletContext}
* @throws javax.servlet.ServletException
*/
@Override
public void init(ServletConfig sc) throws ServletException{
super.init(sc);
atmosphereCtx = sc.getServletContext().getContextPath() + ATMOSPHERE;
CometEngine cometEngine = CometEngine.getEngine();
CometContext context = cometEngine.register(atmosphereCtx);
context.setExpirationDelay(-1);
if (logger.isLoggable(Level.FINE)){
logger.fine("Created CometContext for " + atmosphereCtx);
}
}
/**
* {@inheritDoc}
*/
public Action service(HttpServletRequest req, HttpServletResponse res)
throws IOException, ServletException {
CometContext ctx = CometEngine.getEngine().getCometContext(atmosphereCtx);
Action action = suspended(req, res);
if (action.type == Action.TYPE.SUSPEND) {
if (logger.isLoggable(Level.FINE)){
logger.fine("Suspending" + res);
}
suspend(ctx, action, req, res);
} else if (action.type == Action.TYPE.RESUME){
if (logger.isLoggable(Level.FINE)){
logger.fine("Resuming" + res);
}
resume(req,ctx);
Action nextAction = resumed(req, res);
if (nextAction.type == Action.TYPE.SUSPEND) {
if (logger.isLoggable(Level.FINE)){
logger.fine("Suspending after Resuming" + res);
}
suspend(ctx, action, req, res);
}
}
return action;
}
/**
* Suspend the response
*/
private void suspend(CometContext ctx,Action action,HttpServletRequest req,
HttpServletResponse res ){
VoidCometHandler c = new VoidCometHandler(req, res);
ctx.setExpirationDelay(action.timeout);
ctx.addCometHandler(c);
ctx.addAttribute("Time",System.currentTimeMillis());
req.setAttribute(ATMOSPHERE, c.hashCode());
if (supportSession()){
// Store as well in the session in case the resume operation
// happens outside the AtmosphereHandler.onStateChange scope.
req.getSession().setAttribute(ATMOSPHERE, c.hashCode());
}
}
/**
* Resume the underlying response,
* @param req an {@link HttpServletRequest}
* @param ctx a {@link CometContext}
*/
private void resume(HttpServletRequest req, CometContext ctx){
CometHandler handler = ctx
.getCometHandler((Integer)req.getAttribute(ATMOSPHERE));
req.removeAttribute(ATMOSPHERE);
if (handler == null && supportSession()){
handler = ctx
.getCometHandler((Integer)req.getSession().getAttribute(ATMOSPHERE));
req.getSession().removeAttribute(ATMOSPHERE);
}
if (handler != null){
ctx.resumeCometHandler(handler);
}
}
/**
* {@inheritDoc}
*/
@Override
public void action(AtmosphereResourceImpl actionEvent) {
super.action(actionEvent);
if (actionEvent.action().type == Action.TYPE.RESUME){
CometContext ctx = CometEngine.getEngine().getCometContext(atmosphereCtx);
resume(actionEvent.getRequest(), ctx);
}
}
/**
* Void {@link CometHandler}, which delegate the processing of the
* {@link HttpServletResponse} to an {@link AtmosphereResource}.
*/
private class VoidCometHandler implements CometHandler{
HttpServletRequest req;
HttpServletResponse res;
public VoidCometHandler(HttpServletRequest req, HttpServletResponse res){
this.req = req;
this.res = res;
}
/**
* {@inheritDoc}
*/
public void attach(Object o) {
}
/**
* {@inheritDoc}
*/
public void onEvent(CometEvent ce) throws IOException {
}
/**
* {@inheritDoc}
*/
public void onInitialize(CometEvent ce) throws IOException {
}
/**
* {@inheritDoc}
*/
public void onTerminate(CometEvent ce) throws IOException {
}
/**
* {@inheritDoc}
*/
public synchronized void onInterrupt(CometEvent ce) throws IOException {
long timeStamp = (Long) ce.getCometContext().getAttribute("Time");
try {
if ( (System.currentTimeMillis() - timeStamp) >= ce.getCometContext().getExpirationDelay()) {
timedout(req, res);
} else {
cancelled(req, res);
}
} catch (ServletException ex) {
logger.log(Level.WARNING,"",ex);
}
}
}
}
© 2015 - 2025 Weber Informatics LLC | Privacy Policy