Re: [equinox-dev] Problem with "uses" constraint

[Jeff McAffer <Jeff_McAffer@xxxxxxxxxx>]

Tom Watson and Peter Kriens also did
an excellent tutorial at EclipseCon a couple months ago.  Check out

        http://www.eclipse.org/equinox/documents/TutorialEclipseCon06.ppt

As for your development problems, Melih,
I suspect you are working at this too hard.  If you are using Eclipse
as your IDE you should not be messing with build paths, classpaths, ...
 PDE (Eclipse's Plugin Development Environment) does all of this for
you.  You should just get the bundle/plugin projects in your workspace
(import or check out from CVS) or *even better* just add them to your target
platform.  There is quite a bit of doc in the Eclipse help system
on how to do this.  Look for the sections on PDE.  Just remember,
everywhere you see "plugin" you can read "bundle" since
they are the same thing.

Jeff

Peter Neubauer <peter@xxxxxxxxxxx>
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06/02/2006 03:59 PM

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Subject	Re: [equinox-dev] Problem with "uses" constraint

Melih,
I suspect this is just a normal import in your Manifest
lacking. You have to explicitely import the packages that your bundle is
going to need from other bundles, and export them there. A good tutorial
on getting up to speed with OSGi development is at http://www.knopflerfish.org/programming.html.

/peter
On Jun 2, 2006, at 8:51 PM, Melih Onvural wrote:

I'm getting a similar error, but with the error message
reading:

org.osgi.framework.BundleException: The bundle could not be resolved. Reason:
Missing Constraint: Require-Bundle: org.eclipse.equinox.servlet.bridge.launcher
; bundle-version="0.0.0"

Is this the same problem? Thanks,

Melih Onvural
melih.onvural@xxxxxxxxx

On 6/2/06, Thomas Watson <tjwatson@xxxxxxxxxx>
wrote:

I am able to reproduce.  I opened bug https://bugs.eclipse.org/bugs/show_bug.cgi?id=145067
to track the issue.  The issue is the resolver does not properly handle
when an export is dropped as a result of importing the package from another
bundle.  This causes us to inaccurately flag a uses conflict while
processing other imports for the bundle. 

Thanks Niclas. 

Tom

Niclas Hedhman <niclas@xxxxxxxxxxx>
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06/02/2006 08:40 AM

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Subject	[equinox-dev] Problem with "uses" constraint

Hi,

I have been reading p46 of R4 spec over and over again, and I think I have
found a problem in Equinox, but need some clarification if my thinking
is 
right...


We start Equinox with;

org.eclipse.osgi            (3.2.0.v20060510)
org.eclipse.osgi.services   (3.1.100.v20060511)
pax-logging-service         (0.8.1)

My bundle (Pax Logging) the following Imports and Exports;
(formatting added for readability)

Import-Package: 
   org.knopflerfish.service.log, 
   org.ops4j.pax.logging, 
   org.osgi.framework, 
   org.osgi.service.log, 
   org.w3c.dom, 
   org.xml.sax, 
   org.xml.sax.helpers

Export-Package: 
   org.ops4j.pax.logging;
      version=1.0, 
   org.knopflerfish.service.log;
      uses:="org.osgi.service.log,org.osgi.framework";
      version=1.1,
   org.osgi.service.log;
      version=1.3.0


Equinox reports the following message;
org.osgi.framework.BundleException: The bundle could not be resolved. Reason:
Missing Constraint: Import-Package: org.knopflerfish.service.log; 
version="0.0.0", Package uses conflict: Import-Package: org.osgi.service.log;
version="0.0.0", Missing Constraint: Import-Package: org.osgi.service.log;
version="0.0.0"

IIUIC, the spec agrees with me when I think that this is no a conflict
situation at all. 

Furthermore, if I load pax-logging-service before org.eclipse.osgi.services,
there are also no constraint conflict.

Can anybody share some light on what is happening??


Cheers
Niclas
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