Re: Hot deployment

I've hot-deployed JSPs and classes with Tomcat 4.0.1, JRun 4.0, and WebLogic
6.1SP2.

Mark

-----Original Message-----
From: A mailing list for discussion about Sun Microsystem's Java Servlet API
Technology. [mailto:[email protected]] On Behalf Of Affan
Qureshi
Sent: Saturday, May 31, 2003 5:30 AM
To: [email protected]
Subject: Re: Hot deployment


So no server allows deployment of my classes without reloading the WebApp
right? I heard resin compiles even your servlets when it detects they have
been modified. I would be interested in knowing about some way to redeploy
some of my classes with restarting the webapp but i guess it has to do with
how server's ClassLoader is designed and the Servlet spec has no
restrictions for that.

Thanks,
Affan

----- Original Message -----
From: "Aaron Johnson" <[email protected]>
To: <[email protected]>
Sent: Saturday, May 31, 2003 1:37 AM
Subject: Re: Hot deployment


> Hi Andy,
>
>
> > Is it possible to enable hot deployment in Jakarta Tomcat?  If so, 
> > could someone please provide some configuration instructions?
>  -- by hot deployment do you mean you want to be able to deploy a 
> class or servlet to Tomcat and have Tomcat automatically recognize the 
> new version? If yes, then checkout the 'reloadable' attribute of the 
> Context Container:
>
> http://jakarta.apache.org/tomcat/tomcat-4.0-doc/config/context.html
>
> FYI: "Set to true if you want Catalina to monitor classes in 
> /WEB-INF/classes/ and /WEB-INF/lib for changes, and automatically 
> reload
the
> web application if a change is detected. This feature is very useful
during
> application development, but it requires significant runtime overhead 
> and
is
> not recommended for use on deployed production applications. You can 
> use
the
> Manager web application, however, to trigger reloads of deployed 
> applications on demand."
>
> If you mean you want to able to hot-deploy an entire application, then 
> you'll want to check out the Manager application that comes w/ Tomcat:
>
> http://jakarta.apache.org/tomcat/tomcat-4.0-doc/manager-howto.html
>
> The manager is a web application that allows you to:
>
>  -- Deploy a new web application, on a specified context path, from a 
> specified directory or WAR file pathname.
>  -- List the currently deployed web applications, as well as the 
> sessions that are currently active for those web apps.
>  -- Cause an existing application to be reloaded.
>  -- Undeploy an existing web application.
>  -- Stop an existing application (so that it becomes unavailable), but 
> do not undeploy it.
>  -- Start a stopped application (thus making it available again).
>
> hth,
>
> AJ
>
> Aaron Johnson
> [email protected]
> http://cephas.net/blog/
>
>
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