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| Re: embedding eclipse - osgi [message #48911 is a reply to message #48878] |
Wed, 27 July 2005 06:40   |
Eclipse User |
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Originally posted by: amottadelli.it.ibm.comnospam
Erik Vanherck wrote:
> Hi All,
> I see the same questions have been posted several times however with
> little or no usefull responses. It seems more people are thinking of
> what I want to achieve and hopefully for them I can fill some blanks and
> maybe someone can help me along finding what I need.
>
> Question:
> I want to embed the eclipse runtime inside a java application, a
> servlet, a java api, .. it doesn't really matter. It all boils down on,
> I want to run eclipse and use it's functionality from inside a foreign
> java environment.
> Partial Answer: As eclipse is based on OSGI it's possible to do this.
> Each of the OSGI implementations has some means to retrieve the System
> bundle context. From this bundle context you have access to the services
> provided by bundles in the framework. Eclipse default osgi adaptor is no
> different in this respect and you can basically use the same technique
> if you want to embed Oscar or Knopplerfish. There is however a big BUT.
> The OSGI runtime of eclipse provides two different adaptors. The default
> adaptor (unfortunately a bit poorly documented) and the Eclipse Adaptor.
> The EclipseStarter stuff which is used when normally running eclipse is
> present in the eclipse adaptor.
> The latter unfortunately isn't meant to be run by client code and it
> doesn't provide a way to access the System bundlecontext (AFAIK). Now
> this kind off sucks because I would like to reuse the eclipse plugins
> and configuration directory layout and the default adaptor uses a
> different bundlestore layout.
> So is there no other solution for me than to program a mix between the
> eclipse adaptor and the default adaptor ?
>
> With kind regards,
> Erik Vanherck
>
I have made some experiment in running Eclipse OSGI runtime inside a
Tomcat servlet. The problem I found is that both Tomcat and Eclipse try
to register their own URLStreamHandlerFactory and ContentHandlerFactory.
As a workaround I "hacked" java.net.URL and java.net.URLConnection to
just print out a message instead of throwing an arror.... the runtime
seems now to be starting just fine.
Regards,
Alessandro Mottadelli
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| Re: embedding eclipse - osgi [message #48941 is a reply to message #48911] |
Wed, 27 July 2005 21:03 |
| Eclipse User |
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Originally posted by: skaegi.sympatico.ca
Another way...
You can use Jetty to launch -one- instance of eclipse.
Tomcat calls the offending singleton operation but Jetty doesn't.
--
Either approach should let you launch eclipse in a workable environment
however in order to communicate with a bundle running inside Eclipse you
have a bit more work to do.
An approach that's worked for me is to launch an "application" that does a
call-back to a static method on a class outside of Eclipse (in your
launching environment). There it registers itself as a handle for use in
the communication channel.
By default Eclipse uses "boot" as the parentClassloader. To set up this
communication channel you'll have to set the osgi.parentClassloader=fwk
property. This step is required so that that the application can see the
launching environment's registration point.
(Note: Setting osgi.parentClassloader=fwk might be overkill -- if you can
control the app classpath you might look at Eclipse-BuddyPolicy: app --
considerably tidier)
After registering the channel you can forward messages into your Eclipse
entrypoint via the interface of whatever it was that you registered.
...
You also asked about Adaptors... I would recommend using
EclipseStarter.run(...) unless you simply can't -- and then still I would
leverage it.
Hope this helps.
-Simon
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| Re: embedding eclipse - osgi [message #49027 is a reply to message #48941] |
Tue, 02 August 2005 06:16 |
| Eclipse User |
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Originally posted by: amottadelli.it.ibm.comnospam
Thanks...
Enabling the Eclipse (OSGi) component (programming) model on the server
side could be a huge step forward for server side programming.
J2EE definitely needs something like RCP (maybe a RSP?).
Regards,
Alessandro Mottadelli
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