[iam-dev] Re: [q4e-dev] Re: AJDT / Commons Lang - compatibility issue co

["Joakim Erdfelt" <joakim.erdfelt@xxxxxxxxx>]

I didn't rebuild it, I just used the existing version already present
in subversion.
I just bumped up the trailing version from 'b' to 'c'.

- Joakim Erdfelt

On Tue, Nov 18, 2008 at 2:48 PM, Carlos Sanchez <carlos@xxxxxxxxxx> wrote:
>
> how did you build the embedder?
>
> I have updated our vendor branch of maven, using the same revision as
> before, but updating some dependencies, publishing the jars to
> https://q4e.googlecode.com/svn/repository/releases
>
> it should build with maven again using our maven vendor branch "mvn
> clean package -Peclipse-dev"
>
>
> On Tue, Nov 18, 2008 at 12:42 PM, Joakim Erdfelt
> <joakim.erdfelt@xxxxxxxxx> wrote:
>>
>> I've been working on getting a resolution to
>> https://bugs.eclipse.org/bugs/show_bug.cgi?id=253045 and have had some
>> progress.
>>
>> Here's what I've discovered.  (all through reading code, testing,
>> experimenting, reading forum discussions)
>>
>> You can't have 2 plugins with the same id and different versions
>> installed at the same time.  p2 doesn't support it.
>>
>> I setup 2 plugins (different ids/versions) with 2 features on 2
>> different update sites.
>> Each plugin used a different (perfect) version of commons-lang (i
>> chose commons lang, because it is similar in issue to AJDT issue, but
>> only has 1 dep to worry about)
>>
>> When I added the update sites (both of them) and chose both plugins to
>> install, the p2 provisioning would deny that combo.
>> The existence (or not) of p2 metadata did not change the outcome.
>> Checking the p2 metadata (content.xml) you can see that a perfect
>> version is specified.
>>
>> When I tried to install the same 2 plugins using Eclipse Europa, I get
>> a similar error from the classic update manager.  Can't do it.
>>
>> I also tried using the org.eclipse.equinox.p2.director.app.application
>> to install an arbitrary IU on the command line. (which works
>> wonderfully for q4e and iam itself, btw).
>> This resulted in the second IU install failing due to a dependency
>> conflict with the first IU. :-(
>>
>> Up until this point I've been working under the assumption that OSGI /
>> Eclipse could support this.
>> However, I think we have mis-interpreted what OSGi  / Eclipse can do.
>>
>> I can have 1+ versions of the commons-lang classes present on the
>> system, and in the JVM, completely managed by OSGi, however, If I try
>> to do that with a plugin that has the same symbolic name (id) and
>> different versions, this doesn't work.
>>
>> So I tried a different approach above, and made the first test plugin
>> use a commons-lang with a different symbolic name
>> (org.eclipse.iam.test.commons-lang) and then I could have both
>> versions of commons-lang live at the same time.
>>
>> I'm starting to believe that this is what OSGi is intended to do.
>>
>> - Joakim Erdfelt
>>
>> >
>>
>
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