Thanks, Raymond! Does this also relate to "org.osgi:osgi.cmpn"? Should I
remove this dependency too? Should I add "org.eclipse.osgi.services" or
the individual "org.osgi.service.*" to my (parent) POM? Are the
individual "org.osgi.service.*" also required at runtime (on classpath
or installed to osgi?). Will "org.eclipse.osgi" start without
"org.eclipse.osgi.services" on the classpath or installation as bundle?

I have now added "org.eclipse.osgi.services". However, it now cannot
requires "org.osgi.util.promise". What should I add to my POM in order
to resolve the core Eclipse OSGi implementation (only OSGi core
implementation)?

btw I have removed the runtime scope for "org.eclipse.osgi".

Am 02.01.20 um 19:00 schrieb Raymond Auge:
A bit of rational about why companion jars are unresolvable:

The OSGi specs are to a very high degree independent from each other.
There's no reason for you to be forced to use all R5 specs, or all R6
or whatever. Those are simply marketing versions.

What you are really using are the individual specs at a given version.

For example using DS 1.4, Event 1.0, and logging 1.2 is perfectly fine
combination given you can find providers of each that work together
well. The APIs themselves won't care.

However some providers actually package OSGi spec APIs which they
provide implementations for, which means if you include the aggregate
companion jars also at runtime you may have two API versions to
contend with.

You may inadvertently expose yourself to a wrong API version, hence
why they will no longer resolve.

- Ray

On Thu, Jan 2, 2020 at 12:36 PM Raymond Auge <raymond.a...@liferay.com
<mailto:raymond.a...@liferay.com>> wrote:

    Yes and yes.

    OSGi started adding the unresolveable requirement at release 6
    IIRC. So if you are using a prior releases of the companion jars
    (including cmpn, enterprise) they won't give you this failure, so
    you should upgrade.

    *Replacements:* Replace the compendium APIs with their respective
    individual api jars available on maven central, like this one [1].

    [1]
    
https://search.maven.org/artifact/org.osgi/org.osgi.service.component.annotations/1.4.0/jar

    - Ray


    On Thu, Jan 2, 2020 at 12:31 PM Martin Petzold <mpetz...@gmx.net
    <mailto:mpetz...@gmx.net>> wrote:

        Thanks, Raymond! Does this also relate to
        "org.osgi:osgi.cmpn"? Should I remove this dependency too?

        Am 02.01.20 um 18:23 schrieb Raymond Auge:


        On Thu, Jan 2, 2020 at 12:17 PM Martin Petzold via osgi-dev
        <osgi-dev@mail.osgi.org <mailto:osgi-dev@mail.osgi.org>> wrote:

            Dear OSGi gurus,

            I have a dependency on "org.osgi:osgi.core" (7.0.0) in my
            POM. The reason is that I need access to the
            "org.osgi.framework" package. I am using Maven (3.6) and
            Tycho (1.5.1) for building. The build platform runs
            Debian 10 and Java 11.

            *I get the following error:*

            Missing requirement: osgi.core 7.0.0.201802012106
            requires 'osgi.unresolvable;
            (&(!(must.not.resolve=*))(must.not.resolve=*))' but it
            could not be found


        The "companion jars" are not meant for runtime and since
        resolving is a runtime operation (even when performed during
        build, i.e. deployment purposes) should not be included.

            *However, if I remove the dependency I get the following
            error:*

            Missing requirement: my.bundle 0.0.0.qualifier requires
            'java.package; org.osgi.framework 1.7.0' but it could not
            be found


        This means you have no runtime framework available! Add a
        runtime dependency on the equinox framework:

        <dependency>
        <groupId>org.eclipse.platform</groupId>
        <artifactId>org.eclipse.osgi</artifactId>
            <version>3.x.0</version>
            <scope>runtime</scope>
        </dependency>
        // of course use tycho mechanism for above.

            *What is going wrong? How can I resolve this problem?*

            Stack Overflow:
            
https://stackoverflow.com/questions/59563368/maven-tycho-cannot-resolve-osgi-core-bundle

        I'll answer there in a moment.

        - Ray

            Thanks and kind regards,

            Martin

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        --
        *Raymond Augé*
        <http://www.liferay.com/web/raymond.auge/profile> (@rotty3000)
        Senior Software Architect *Liferay, Inc.*
        <http://www.liferay.com> (@Liferay)



    --
    *Raymond Augé*
    <http://www.liferay.com/web/raymond.auge/profile> (@rotty3000)
    Senior Software Architect *Liferay, Inc.*
    <http://www.liferay.com> (@Liferay)



--
*Raymond Augé*
<http://www.liferay.com/web/raymond.auge/profile> (@rotty3000)
Senior Software Architect *Liferay, Inc.*
<http://www.liferay.com> (@Liferay)
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