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[m2] Question about Maven2 repository "chains".

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jan-helge.bergesen
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[m2] Question about Maven2 repository "chains".

jan-helge.bergesen

Hello.

We've been using Maven 1.0.x for about a year now, and I recently started
looking at Maven2 as we're going
to shuffle our build servers around a bit.

I've run into an issue:
When using Maven 1.0.x we've set up a list of repositories in
build.properties thus:

axx.repo.vob=${basedir}/../lib/ext/.maven/repository
maven.repo.remote=file:${axx.repo.vob},http://axitbpc015:8080/jars,http://www.ibiblio.org/maven


The source code is under ClearCase control, and so is the ../lib/ext tree
(don't ask - it's a QA thing).

Now in my Maven2 experiment I've started with our "lowest-level-component"
and set up the following in
pom.xml:

  <repositories>
    <repository>
      <id>VOB</id>
      <name>VOB</name>
      <url>file:../lib/ext/.maven/repository</url>
      <layout>legacy</layout>
    </repository>
  </repositories>
  <dependencies>
...
    <dependency>
     <groupId>VENDOR</groupId>
      <artifactId>COMMERCIAL_COMPONENT</artifactId>
      <version>1.0</version>
    </dependency>
...
  </dependencies>

This produces the following when I've enabled debug - is it required to
write a "mock" pom for such artifacts for Maven2 to see them?

...
[DEBUG] Resolving: VENDOR:COMMERCIAL_COMPONENT:pom:1.0 from:
{localRepository: [local] -> file://d:/stage/MAIN/.maven/repository}
{remoteRepositories: [[central] -> http://repo1.maven.org/maven2, [VOB] ->
file:../lib/ext/.maven/repository]}
Downloading: VENDOR/COMMERCIAL_COMPONENT/1.0/COMMERCIAL_COMPONENT-1.0.pom
[WARNING] Unable to get resource from repository
http://repo1.maven.org/maven2
[ERROR] Nonexistent component: org.apache.maven.wagon.Wagonfile
[INFO]
----------------------------------------------------------------------------

[ERROR] BUILD ERROR
[INFO]
----------------------------------------------------------------------------

[ERROR] Cause:
org.apache.maven.plugin.PluginExecutionException: Unable to resolve
required dependencies for goal
        at
org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:375)

        at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeMojo(DefaultLifecycleExecutor.java:448)

        at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executePhase(DefaultLifecycleExecutor.java:417)

        at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:140)

        at
org.apache.maven.DefaultMaven.processProject(DefaultMaven.java:212)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:136)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:233)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

        at java.lang.reflect.Method.invoke(Method.java:324)
        at
org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:303)
        at org.codehaus.classworlds.Launcher.launch(Launcher.java:243)
        at
org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:416)
        at org.codehaus.classworlds.Launcher.main(Launcher.java:363)
Caused by: org.apache.maven.artifact.resolver.ArtifactResolutionException:
Error transitively resolving artifacts:
        at
org.apache.maven.artifact.resolver.DefaultArtifactResolver.resolveTransitively(DefaultArtifactResolver.java:191)

        at
org.apache.maven.plugin.DefaultPluginManager.resolveTransitiveDependencies(DefaultPluginManager.java:723)

        at
org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:355)

        ... 14 more
Caused by:
org.apache.maven.artifact.resolver.TransitiveArtifactResolutionException:
Error retrieving metadata [VENDOR:COMMERCIAL_COMPONENT:jar:1.0] :
        at
org.apache.maven.artifact.resolver.DefaultArtifactResolver.collect(DefaultArtifactResolver.java:307)

        at
org.apache.maven.artifact.resolver.DefaultArtifactResolver.resolveTransitively(DefaultArtifactResolver.java:187)

        ... 16 more
Caused by:
org.apache.maven.artifact.metadata.ArtifactMetadataRetrievalException:
Unable to read the metadata file
        at
org.apache.maven.artifact.MavenMetadataSource.retrieve(MavenMetadataSource.java:89)

        at
org.apache.maven.artifact.resolver.DefaultArtifactResolver.collect(DefaultArtifactResolver.java:303)

        ... 17 more
Caused by: org.apache.maven.project.ProjectBuildingException: Unable to
find artifact: VENDOR:COMMERCIAL_COMPONENT:pom:1.0
        at
org.apache.maven.project.DefaultMavenProjectBuilder.findModelFromRepository(DefaultMavenProjectBuilder.java:167)

        at
org.apache.maven.project.DefaultMavenProjectBuilder.buildFromRepository(DefaultMavenProjectBuilder.java:149)

        at
org.apache.maven.artifact.MavenMetadataSource.retrieve(MavenMetadataSource.java:83)

        ... 18 more
[INFO]
----------------------------------------------------------------------------

[INFO] Total time: 4 seconds
[INFO] Finished at: Fri May 13 10:16:43 CEST 2005
[INFO] Final Memory: 1M/2M
[INFO]
----------------------------------------------------------------------------



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Kenney Westerhof
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Re: [m2] Question about Maven2 repository "chains".

Kenney Westerhof
On Fri, 13 May 2005 [hidden email] wrote:

Maven doesn't know what type of artifact your dependency is referring
to, so it needs the POM to find out the packaging. Writing a POM
is always a good idea.

I haven't tried this (don't know if it's supported either) but maybe
you can specify <type>jar</type> in the m2 dependency, so it won't need
the POM, but my guess is that this doesn't work and you still need
the pom.

-- Kenney

>
> Hello.
>
> We've been using Maven 1.0.x for about a year now, and I recently started
> looking at Maven2 as we're going
> to shuffle our build servers around a bit.
>
> I've run into an issue:
> When using Maven 1.0.x we've set up a list of repositories in
> build.properties thus:
>
> axx.repo.vob=${basedir}/../lib/ext/.maven/repository
> maven.repo.remote=file:${axx.repo.vob},http://axitbpc015:8080/jars,http://www.ibiblio.org/maven
>
>
> The source code is under ClearCase control, and so is the ../lib/ext tree
> (don't ask - it's a QA thing).
>
> Now in my Maven2 experiment I've started with our "lowest-level-component"
> and set up the following in
> pom.xml:
>
>   <repositories>
>     <repository>
>       <id>VOB</id>
>       <name>VOB</name>
>       <url>file:../lib/ext/.maven/repository</url>
>       <layout>legacy</layout>
>     </repository>
>   </repositories>
>   <dependencies>
> ...
>     <dependency>
>      <groupId>VENDOR</groupId>
>       <artifactId>COMMERCIAL_COMPONENT</artifactId>
>       <version>1.0</version>
>     </dependency>
> ...
>   </dependencies>
>
> This produces the following when I've enabled debug - is it required to
> write a "mock" pom for such artifacts for Maven2 to see them?
>
> ...
> [DEBUG] Resolving: VENDOR:COMMERCIAL_COMPONENT:pom:1.0 from:
> {localRepository: [local] -> file://d:/stage/MAIN/.maven/repository}
> {remoteRepositories: [[central] -> http://repo1.maven.org/maven2, [VOB] ->
> file:../lib/ext/.maven/repository]}
> Downloading: VENDOR/COMMERCIAL_COMPONENT/1.0/COMMERCIAL_COMPONENT-1.0.pom
> [WARNING] Unable to get resource from repository
> http://repo1.maven.org/maven2
> [ERROR] Nonexistent component: org.apache.maven.wagon.Wagonfile
> [INFO]
> ----------------------------------------------------------------------------
>
> [ERROR] BUILD ERROR
> [INFO]
> ----------------------------------------------------------------------------
>
> [ERROR] Cause:
> org.apache.maven.plugin.PluginExecutionException: Unable to resolve
> required dependencies for goal
>         at
> org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:375)
>
>         at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeMojo(DefaultLifecycleExecutor.java:448)
>
>         at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executePhase(DefaultLifecycleExecutor.java:417)
>
>         at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:140)
>
>         at
> org.apache.maven.DefaultMaven.processProject(DefaultMaven.java:212)
>         at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:136)
>         at org.apache.maven.cli.MavenCli.main(MavenCli.java:233)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>
>         at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>
>         at java.lang.reflect.Method.invoke(Method.java:324)
>         at
> org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:303)
>         at org.codehaus.classworlds.Launcher.launch(Launcher.java:243)
>         at
> org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:416)
>         at org.codehaus.classworlds.Launcher.main(Launcher.java:363)
> Caused by: org.apache.maven.artifact.resolver.ArtifactResolutionException:
> Error transitively resolving artifacts:
>         at
> org.apache.maven.artifact.resolver.DefaultArtifactResolver.resolveTransitively(DefaultArtifactResolver.java:191)
>
>         at
> org.apache.maven.plugin.DefaultPluginManager.resolveTransitiveDependencies(DefaultPluginManager.java:723)
>
>         at
> org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:355)
>
>         ... 14 more
> Caused by:
> org.apache.maven.artifact.resolver.TransitiveArtifactResolutionException:
> Error retrieving metadata [VENDOR:COMMERCIAL_COMPONENT:jar:1.0] :
>         at
> org.apache.maven.artifact.resolver.DefaultArtifactResolver.collect(DefaultArtifactResolver.java:307)
>
>         at
> org.apache.maven.artifact.resolver.DefaultArtifactResolver.resolveTransitively(DefaultArtifactResolver.java:187)
>
>         ... 16 more
> Caused by:
> org.apache.maven.artifact.metadata.ArtifactMetadataRetrievalException:
> Unable to read the metadata file
>         at
> org.apache.maven.artifact.MavenMetadataSource.retrieve(MavenMetadataSource.java:89)
>
>         at
> org.apache.maven.artifact.resolver.DefaultArtifactResolver.collect(DefaultArtifactResolver.java:303)
>
>         ... 17 more
> Caused by: org.apache.maven.project.ProjectBuildingException: Unable to
> find artifact: VENDOR:COMMERCIAL_COMPONENT:pom:1.0
>         at
> org.apache.maven.project.DefaultMavenProjectBuilder.findModelFromRepository(DefaultMavenProjectBuilder.java:167)
>
>         at
> org.apache.maven.project.DefaultMavenProjectBuilder.buildFromRepository(DefaultMavenProjectBuilder.java:149)
>
>         at
> org.apache.maven.artifact.MavenMetadataSource.retrieve(MavenMetadataSource.java:83)
>
>         ... 18 more
> [INFO]
> ----------------------------------------------------------------------------
>
> [INFO] Total time: 4 seconds
> [INFO] Finished at: Fri May 13 10:16:43 CEST 2005
> [INFO] Final Memory: 1M/2M
> [INFO]
> ----------------------------------------------------------------------------
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: [hidden email]
> For additional commands, e-mail: [hidden email]
>

--
Kenney Westerhof
http://www.neonics.com
GPG public key: http://www.gods.nl/~forge/kenneyw.key

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