Re: embedding openJMS into tomcat

TJ -

Embedding it isn't so hard.  You just have to be able to pass OpenJMS 
the location of the configuration file you would have used in the normal 
standalone startup.

Here's a denatured version of what we do on servlet init().

...
JmsServer theJmsServer;
...

         String configFile = config.getInitParameter("OpenJms.config"); 
// readable by the servlet's security manager. maybe none.
         try
         {
            String PROVIDER_URLR = "tcp://" + 
InetAddress.getByName("localhost").getHostAddress() + ":3035";
            config.getServletContext().setAttribute("JMS_PROVIDER", 
PROVIDER_URL);
         }
         catch (UnknownHostException e)
         {
            logger.log(Level.SEVERE, "Unknown Host in PROVIDER_URL.", e);
         }

         // Create and start the OpenJMS server
         // All we can do is fire it off and let it go.
         logger.info("Loading OpenJMS Server with config [" + configFile 
+ "]");

         try
         {
            theJMSServer = new JmsServer(configFile);
            logger.info("OpenJMS Server instantiated, running init().");
            theJMSServer.init(); // all of OpenJMS's startup work is 
done in here.
         }
         catch (Throwable e)
         {
            logger.log(Level.SEVERE, "OpenJMS Server could not run.", e);
         }

...

So when your Servlet init()s  - the server starts.  When tomcat or your 
webapp dies, so does the JMS server.
In order to access and use the server - you would get the JNDI context 
and interact normally using the context's PROVIDER_URL to create 
Topic/QueueConnections etc.

Hope this helps.



Ken





TJ Greenier wrote:

> I also use OpenJMS with tomcat 5.  I use an http connection and 
> deployed the openjms tunnel servlet to my tomcat webapp.  This worked 
> very well for us.
>
> I do have a question though.  Currently I start the openJMS server and 
> tomcat servers seperately using each ones startup script.  Has anyone 
> started and stopped openJMS programmatically?  if so, any 
> suggestions?  I want to put some code in a servlet that will start up 
> openJMS when tomcat is started and shutdown openJMS when tomcat is 
> shutdown.  For my project this will be sufficient, because if tomcat 
> is down then openjms can be down as well.  Plus we are only connecting 
> via http. 
>
> Any ideas or thoughts are much appreciated.
>
> Thanks,
> TJ
>
> On 9/22/05, *Ken M* <wgold-WNUMbkg7HQH83n0zhJamUgC/[email protected] 
> <mailto:wgold-WNUMbkg7HQH83n0zhJamUgC/[email protected]>> wrote:
>
>     Stas -
>
>     I use OpenJMS with Tomcat 5 with great results.
>
>     I just embed the OpenJMS initialization into my webapp's servlet
>     init()
>     and presto chango - OpenJMS in Tomcat.
>
>     I'm not sure if there's a way to make Tomcat use OpenJMS directly
>     - as
>     Tomcat doesn't really do anything by itself without a web
>     application to
>     control.
>
>     OpenJMS is a perfect drop-in.
>
>     Ken
>
>
>     Stas Ostapenko wrote:
>
>     >Hi !
>     >
>     >I'm wery interested in embedding openJMS into Tomcat.There is no docs
>     >or some kind of tutorial how its can be done. I'm googling with no
>     >results on this topic. Only some articles about using standalone
>     >openJMS with Tomcat. Step by step tutorial will be simlpy great.
>     >Is it possible to do something similar to Activemq +Tomcat
>     integration
>     >(http://activemq.codehaus.org/Tomcat) ?
>     >
>     >Plese help. Thanks.
>     >Regards, Stas.
>     >
>     >
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