Salut,
Hiram Coffy wrote:
> Hi all,
>
>
>
> I am still struggling with getting my comet-based servlet to work. Any
> help would be much appreciated
>
what is the issue?
>
>
> I guess what would be helpful for me is a simple step-by-step procedure.
> So far, what I have found is scattered and fragmented bits and pieces of
> information, critical details appear to be glossed over.
What about that one:
http://weblogs.java.net/blog/jfarcand/archive/2008/02/comet_support_i.html
>
>
>
> I suppose I can boil down my request to the following set of questions:
>
> 1) APP SERVER: What do I need to get comet-based servlet working? e.g.
> glassfish V2UR2 with comet support enabled.
Comet is supported since GF v1. v2ur2 is fine.
>
>
>
> 2) API: What compatible comet api should I compile the source code with?
If you plan to deploy against v2ur2, you need to build against the API
that ship with v2. Hence, in your classpath, you need to add:
${glassfish.home}/lib/appserv-rt.jar
or follow what I've described here:
http://weblogs.java.net/blog/jfarcand/archive/2008/07/getting_started.html
>
>
>
> 3) API DOWNLOAD: Where do I download the API from?
>
>
>
> 4) CLASSPATH: Do I copy the API to ${as.home}/lib for example
>
>
>
> 5) TEST: How do I positively verify that comet support is indeed enabled?
Deploy the following application (which is build agains v2ur2). It's the
JMaki Magnet demo.
>
>
>
> 6)Last question: Does the app server come bundled with the comet api
yes, in v2: com.sun.enterprise.web.connector.grizzly.comet.*
in v3 and grizzly standalone: com.sun.grizzly.comet
Let me know if you still have issue.
A+
-- Jeanfrancois
>
>
>
> *From:* Hiram Coffy
> *Sent:* Sunday, October 26, 2008 5:39 PM
> *To:* 'users_at_grizzly.dev.java.net'
> *Subject:* Problem with comet-based web app
>
>
>
> Hello Jean-Francois,
> Let me start by thanking you for all your good work on the Grizzly/comet
> front. Kudos!
>
> I wrote a simple comet app based on the tutorial found at:
> http://docs.sun.com/app/docs/doc/820-4496/ggrgt?a=view.
>
> I get the following exception when a request is received by my servlet:
> java.lang.IllegalStateException: Make sure you have enabled Comet or
> make sure the Thread invoking that method is the same a the request Thread.
> at com.sun.grizzly.comet.CometContext.addCometHandler(CometContext.java:263)
> at com.sun.grizzly.comet.CometContext.addCometHandler(CometContext.java:311)
> ....
>
> I have already combed through your blogs. I have tried all the
> suggestions that I have come across. So far, i haven't had any success.
> I noticed a peculiar behavior with my glassfish instance; whether
> <property name="cometSupport" value="true"/> is added to domain.xml or
> not seems to make not a bit of a difference.
>
> I have made sure to bounce the server every time i make a change to
> domain.xml to ensure that the changes will be recognized. I have tried
> several experiments with the "cometSupport" property added and removed
> from domain.xml. I ave tried similar experiments with <property
> name="proxiedProtocols" value="ws/tcp"/> I have even enabled the flag
> through the command line using "asadmin set
> server.http-service.http-listener.http-listener-1.property.cometSupport=true"
>
> Relevant environment information:
> Sun Java System Application Server 9.1 (build b58g-fcs) (GlassfishV2)
>
> excerpt from domain.xml:
> ....
> <http-listener acceptor-threads="1" address="0.0.0.0"
> blocking-enabled="false" default-virtual-server="server" enabled="true"
> family="inet" id="http-listener-1" port="8080" security-enabled="false"
> server-name="" xpowered-by="true">
> <property name="proxiedProtocols" value="ws/tcp"/>
> <property name="cometSupport" value="true"/>
> </http-listener>
> ....
>
> excerpt from app server output console:
> ....
> WEB0302: Starting Sun-Java-System/Application-Server.
> Enabling Grizzly ARP Comet support.
> WEB0712: Starting Sun-Java-System/Application-Server HTTP/1.1 on 8080
> ....
>
> excerpt from web.xml
> ...
> <servlet>
> <servlet-name>RefreshServlet</servlet-name>
> <servlet-class>package.RefreshServlet</servlet-class>
> <load-on-startup>0</load-on-startup>
> </servlet>
> ...
>
> The following bit of code registers the handler and is invoked only
> once, upon receipt of first request.
> private void registerHandler(HttpServletResponse response)
> throws IllegalStateException{
> if (oneShot) {
> RefreshHandler handler = new RefreshHandler();
> handler.attach(response);
>
> CometEngine engine = CometEngine.getEngine();
> CometContext context = engine.getCometContext(contextPath);
>
> try{
> context.addCometHandler(handler);
> oneShot = false;
> }catch(IllegalStateException ex){
> logger.error(ex.getMessage(), ex);
> throw ex;
> }
> }
> }
> Two questions:
> 1) Any suggestions?
> 2) How can I positively tell that comet support is indeed enabled?
>
>
>