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From "Robert Munteanu (JIRA)" <>
Subject [jira] [Commented] (DIRSTUDIO-1068) Bundles are not resolved on Eclipse Mars
Date Fri, 28 Aug 2015 13:36:45 GMT


Robert Munteanu commented on DIRSTUDIO-1068:

{quote}But to be honest I don't have a clue what makes the difference, do you have any idea?{quote}

I see that the slf4j-api bundle included in DirectoryStudio has an Import-Package statement
( strange for an API bundle )

 Export-Package = org.slf4j;version=1.7.10, org.slf4j.spi;version=1.7.10, org.slf4j.helpers;version=1.7.10
 Import-Package = org.slf4j.impl;version=1.6.0

That package is exported by the logback bundle, which in turns imports org.slf4j.helpers from
the _other_ slf4j bundle, which is the root cause of the uses constraint violation. With this
wiring the slf4j-api bundle would be exposed to the same package exported by two bundles.

I looked at the update site and noticed that the log binding features pulls in the,
which exports the 'impl' package and is actually a fragment bundle:

Fragment-Host: slf4j.api;bundle-version="[1.7.10,1.7.11)"
Export-Package: org.slf4j.impl;version="2.0.0"

This means that the slf4j-api bundle no longer has to be wired to the logback-core bundle
to be resolved, which explains why this works.

{quote}Anyway, I hope that with DIRAPI-233 and update to LDAP API 1.0.0-M31 the additional
slf4j-api 1.7.10 won't be required any more. I'll test when I find some time.{quote}

Is there a way I can test these changes myself?

> Bundles are not resolved on Eclipse Mars
> ----------------------------------------
>                 Key: DIRSTUDIO-1068
>                 URL:
>             Project: Directory Studio
>          Issue Type: Bug
>          Components: studio-updatesite
>            Reporter: Robert Munteanu
>         Attachments: eclipse-mars-error.log
> I have an Eclipse Mars install and installed Directory Studio using the Eclipse Marketplace.
> After the installation is performed I have multiple error FrameworkEvents logged regarding
bundle installations. All of them bubble down to a uses constraint violation.
> {noformat} Bundle was not resolved because of a uses contraint violation.
>   org.osgi.service.resolver.ResolutionException: Uses constraint violation. Unable to
resolve resource slf4j.api [osgi.identity; osgi.identity="slf4j.api"; type="osgi.bundle";
version:Version="1.7.10"] because it exports package 'org.slf4j.helpers' and is also exposed
to it from resource org.slf4j.api [osgi.identity; osgi.identity="org.slf4j.api"; type="osgi.bundle";
version:Version="1.7.2.v20121108-1250"] via the following dependency chain:
>   slf4j.api [osgi.identity; osgi.identity="slf4j.api"; type="osgi.bundle"; version:Version="1.7.10"]
>     import: (&(osgi.wiring.package=org.slf4j.impl)(version>=1.6.0))
>      |
>     export: osgi.wiring.package=org.slf4j.impl; uses:=null
>   org.slf4j.api [osgi.identity; osgi.identity="org.slf4j.api"; type="osgi.bundle"; version:Version="1.7.2.v20121108-1250"]
>     require: (&(osgi.wiring.bundle=ch.qos.logback.classic)(&(bundle-version>=1.0.7)(!(bundle-version>=1.0.8))))
>      |
>     provide: osgi.wiring.bundle; bundle-version:Version="1.0.7.v20121108-1250"; osgi.wiring.bundle="ch.qos.logback.classic"
>   ch.qos.logback.classic [osgi.identity; osgi.identity="ch.qos.logback.classic"; type="osgi.bundle";
>     import: (&(osgi.wiring.package=org.slf4j.helpers)(version>=1.7.0))
>      |{noformat}

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