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From Paolo Spadafora <p.spadaf...@gmail.com>
Subject Re: Eclipse WTP + Tomcat Debug
Date Mon, 23 Feb 2009 08:13:16 GMT
Hi,
I am very busy but I'd like to work on it.
Will keep you up to date.

thank you.

Paolo.

2009/2/21 Jonathan Gallimore <jonathan.gallimore@gmail.com>

> On Sat, Feb 21, 2009 at 8:20 PM, David Blevins <david.blevins@visi.com
> >wrote:
>
> > On Feb 13, 2009, at 3:43 AM, Paolo Spadafora wrote:
> >
> >  Hi,
> >> To answer you question: yes.
> >> It's because of openejb+tomcat, usually I can change a line of code and
> >> see
> >> the new change without restart tomcat or reload the webapp.
> >> It does not reload the webapp, just the single class, but it depends,
> >> sometimes it's necessary to do a restart or reload the webapp, the
> plugin
> >> somehow is able to understand that (you see "restart" in the tomcat
> >> status).
> >> As I said in another email, where I explain a bit about WTP plugin, it's
> >> necessary to have a plugin that takes care of a few tasks (like set
> >> openejb_home dynamically, set bootstrap jars and so on).
> >> Probably is not so difficult to extend the current wtp tomcat plugin to
> >> handle openejb.
> >>
> >
> > That's interesting.  We do have an WTP-based Eclipse plugin in
> development
> > for OpenEJB, but I think it might be OpenEJB-standalone only at this
> point.
> >  Jonathan, would know better -- he wrote it :)
>
>
> That's absolutely right - the WTP plugin is only for the standalone OpenEJB
> server. There is already a WTP plugin for Tomcat which comes with the
> Eclipse JST/WST tools.
>
> I don't have any ideas of my own as to why Eclipse isn't hotswapping your
> code, although I did wonder whether it was just a class loading issue or
> something like that (but that is just a complete guess).
>
>
> >
> > On Feb 11, 2009, at 12:57 AM, Paolo Spadafora wrote:
> >
> >> With eclipse WTP you can debug a web application without restart tomcat
> >> (except a few cases, like changes on a struts config).
> >> It runs an instance of tomcat using a temp folder to deploy webapp
> >> (exploded) and some custom xml configuration (adds a few special tags
> >> inside
> >> server.xml and web.xml).
> >> I think what we need is something like the JBoss plugin not WTP.
> >> The JBoss plugin does something very simple, keeps in synch your webapps
> >> and
> >> ejbs by copying the compiled classes (and project files) under the
> >> deployment folder, like mywebapp.war or myejb.jar, but these are
> folders,
> >> not files.
> >> Basically the tomcat-openejb plugin should do a few simple things:
> >> - start its own customized instance of tomcat with a pre-deployed
> >> application: openejb.war
> >> - keep a list of deployed application (eg: a Web Application "webapp"
> and
> >> an
> >> EJB "ejb")
> >> - intercept changes to deployed webapp files or class compilation and
> >> synch
> >> with tomcat copy
> >> - intercept changes to deployed ejb and synch with the
> filesystem/openejb,
> >> like runtime class loading/replacement
> >> - undeploy and clean (temp files, etc)
> >>
> >> For instance, for point 1, the plug-in should dynamically crate a temp
> >> folder where to run openejb-tomcat, set openejb home for you, set
> >> bootstrap
> >> jars, etc. usually they do in the plug-in folder:
> >> eclipse/plugins/openejb.apache.org/tmp0/.
> >> There is more, but I think is enough to give you an idea.
> >>
> >
> >
> > Jonathan might have a better idea what it might take to do some of these
> > things.  And while we're wrangling up people, are you at all interested
> in
> > working on it?  I bet you're already designing it in your head :)
> >
>
> This all sounds very interesting - I think a WTP server for Tomcat+OpenEJB
> would be be very useful. The current plugin uses the DeployerBusiness EJB
> in
> the standalone server, and it looks like this is available in Tomcat,
> perhaps we can use functionality we already have in
> org.apache.openejb.eclipse.server.ServerDeployer [
>
> https://svn.apache.org/repos/asf/openejb/trunk/sandbox/openejb-eclipse-plugin/plugins/org.apache.openejb.server/src/main/java/org/apache/openejb/eclipse/server/ServerDeployer.java
> ]
> to keep everything in sync.
>
> If you'd like to work on this, please do join in. I'll help you in any way
> I
> can.
>
> Jon
>
>
> >
> >
> > -David
> >
> >
> >
> >  Bye,
> >> Paolo
> >>
> >>
> >> On 13/02/09 05:12, "Karan Malhi" <karan.malhi@gmail.com> wrote:
> >>
> >>  I am using maven-tomcat-plugin in eclipse and its working fine. I have
> >>> not
> >>> run it in debug mode, but I have to redeploy the app if I make a change
> >>> to
> >>> any .class or update a jar in the lib. Here is the tomcat documentation
> >>> which says that in development mode, tomcat would reload teh app if
> >>> reloadable is set to true
> >>>
> >>> reloadable
> >>>
> >>> 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. That's why the
> >>> default setting for this attribute is *false*. You can use the
> >>> Manager<http://tomcat.apache.org/tomcat-6.0-doc/manager-howto.html>web
> >>> application, however, to trigger reloads of deployed applications on
> >>> demand.
> >>> The maven-tomcat-plugin also redeploys the app when I make some change.
> >>>
> >>> I do not know much about tomcat +WTP, but seems like whether debugging
> or
> >>> not, webapp is reloaded when classes/jars change in webapp.
> >>>
> >>> Question:- Is it because of openejb + tomcat that you have to reload
> the
> >>> webapp while debugging, or do you have to do that anyway (for a tomcat
> >>> instance without  openejb)?
> >>>
> >>> On Wed, Feb 11, 2009 at 12:14 AM, David Blevins <
> david.blevins@visi.com
> >>> >wrote:
> >>>
> >>>  On Feb 3, 2009, at 2:30 AM, Paolo Spadafora wrote:
> >>>>
> >>>> To be able to work seriously I need to debug tomcat with embed openejb
> >>>>
> >>>>> using
> >>>>> WTP,
> >>>>> I know how to do it with remote debugger but doesn't work well,
have
> to
> >>>>> re-deploy my ejb+webapp each time.
> >>>>>
> >>>>>
> >>>> Hi Paolo,
> >>>>
> >>>> I'm not familiar with the Tomcat support in the Eclipse WTP.  If you
> can
> >>>> tell me a bit about it that would be appreciated.
> >>>>
> >>>> Karan was mentioning something the other day regarding Eclipse/Tomcat
> >>>> and
> >>>> having to start/stop Tomcat after each change.  Cc'ing him as maybe
he
> >>>> has
> >>>> some info also.
> >>>>
> >>>> -David
> >>>>
> >>>>
> >>>>
> >>>>
> >>>
> >>
> >>
> >>
> >
>

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