| Question regarding ServiceSelector Filter mechanism [message #114815] |
Mon, 21 July 2008 07:41  |
Eclipse User |
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Originally posted by: fappel.innoopract.com
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Hi,
doing a follow up on a RAP user complaint regarding that the eclipse
help doesn't work with RAP anymore I came across the ServiceSelector
filter mechanism (bug 158168
<https://bugs.eclipse.org/bugs/show_bug.cgi?id=158168> ). It took me a
while to figure out that using
'-Dorg.eclipse.equinox.http.jetty.other.info=org.eclipse.hel p' as VM
argument revives the help system.
Unfortunately RAP applications are most often not deployed using OSGi
standalone with the Jetty engine as HttpService provider, they run
embedded in the various available servlet container implementations. So
what I couldn't figure out is what I have to do to bring the help system
back to work in those scenarios (e.g running in tomcat). My hope is that
users don't have to configure a different startup parameter for each
container implementation, since this will cause us user-acceptance
problems. Anyway it would be nice if somebody could point me to more
detailed information or solution regarding this problem.
By the way something that I couldn't understand properly by reading the
bug, is why this functionality was introduced the first time, since it
was stated by Simon that ' its quite rare to run more than one
HttpService in a single VM'. So I'm wondering if there was a real
usecase where the previous situation actually caused problems.
Ciao
Frank
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<p class=3DMsoNormal>Hi,<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>doing a follow up on a RAP user complaint regarding =
that the
eclipse help doesn't work with RAP anymore I came across the =
ServiceSelector
filter mechanism (bug <a
href=3D"https://bugs.eclipse.org/bugs/show_bug.cgi?id=3D158168">158168</a=
>). It
took me a while to figure out that using =
'-Dorg.eclipse.equinox.http.jetty.other.info=3Dorg.eclipse.h elp'
as VM argument revives the help system.<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>Unfortunately RAP applications are most often not =
deployed using
OSGi standalone with the Jetty engine as HttpService provider, they run
embedded in the various available servlet container implementations. So =
what I
couldn't figure out is what I have to do to bring the help system back =
to work
in those scenarios (e.g running in tomcat). My hope is that users don't =
have to
configure a different startup parameter for each container =
implementation,
since this will cause us user-acceptance problems. Anyway it would be =
nice if somebody
could point me to more detailed information or solution regarding this =
problem.<o:p></o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<pre><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif "'>By the way =
something that I couldn't understand properly by reading the bug, is why =
this functionality was introduced the first time, since it was stated by =
Simon that ' its quite rare to run more than one HttpService in a single =
VM'. So I'm wondering if there was a real usecase where the =
previous situation actually caused problems.<o:p></o:p></span></pre>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal><o:p> </o:p></p>
<p class=3DMsoNormal>Ciao<o:p></o:p></p>
<p class=3DMsoNormal>Frank<o:p></o:p></p>
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| Re: Question regarding ServiceSelector Filter mechanism [message #115356 is a reply to message #115343] |
Fri, 25 July 2008 06:52  |
| Eclipse User |
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Originally posted by: fappel.innoopract.com
Hi again,
> The problem with the serviceSelector element is that it leaks runtime
environment specifics into development.
that's the precise phrase I was looking for :-)
Thanks for the bundle, I will check it out.
Ciao
Frank
-----Ursprüngliche Nachricht-----
Von: Gunnar Wagenknecht [mailto:gunnar@wagenknecht.org]
Bereitgestellt: Freitag, 25. Juli 2008 12:16
Bereitgestellt in: eclipse.technology.equinox
Unterhaltung: Question regarding ServiceSelector Filter mechanism
Betreff: Re: Question regarding ServiceSelector Filter mechanism
Frank Appel schrieb:
> In my opinion those filters should not be set by the plug-in developer
> like it happens in the webapp plug-in. This should be done by the one
> who knows about the target system. I mean someone like that person who
> creates a product.
Yupp, I agree. There should be a "default" which can be overwritten by
product creators.
The problem with the serviceSelector element is that it leaks runtime
environment specifics into development.
FWIW, I've opend bug 239555 which patches the HTTP registry to limit the
service it registers with (mainly for security reasons). But this is not
really related to the HELP case. I think that the HELP WebApp developers
wanted to be good citizens. The HELP plug-in starts it's own service on
a random port only for the purpose to run the help content on it. Thus,
the usage of the serviceSelector is reasonable.
But did you know that there is any easy workaround? Simply deploy the
attached bundle and it will register the help content without any
serviceSelector. :)
-Gunnar
--
Gunnar Wagenknecht
gunnar@wagenknecht.org
http://wagenknecht.org/
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