CODEWITHSUNDEEP
maven-2repositoryconventions
Dacav
Dacav

Reputation: 14078

How does maven find the artifacts?

I'm trying to use as library a poorly documented piece of software. On the website they listed the Artifact IDs of its dependencies, but then I guess they removed one of the pieces.

The mvn compile command (on my project, using the other as dependency) I get the following error for one of the dependencies:

[INFO] Scanning for projects...
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building <my software> 0.1
[INFO] ------------------------------------------------------------------------
[WARNING] The POM for <my dependency> no dependency information available
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.426s
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal on project <my project>: Could not resolve dependencies for project <my project>: Failure to find <my dependency> in http://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced -> [Help 1]

Searching on the Internet I found out that Maven uses, by default, a world-wise centralized repository on ibiblio.org, but it's very unlikely that they're using it.

As they are not supporting me, I need to find my way through their stuff, so my question is: is there a standard way of publishing maven repositories?

For instance, is there a lookup system associated to the groupId (which is usually in the form org.example.something)?

Related question: Maven - how/where to publish artifacts

Upvotes: 1

Views: 1305

Answers (1)

khmarbaise
khmarbaise

Reputation: 97399

The default place where maven is getting it's artifacts from is Maven Central whereas ibiblio.org is only a mirror of Maven Central (see repository guide). See the repository guide.

Furthermore there is no relationship between the groupId and a maven repository. The best is to search for artifacts in Maven central.

Apart from that you should delete the part of your local repository (.m2/repository/) where the requested artifact is located cause based on the message you got it looks you tried to get an artifact which does not have the given groupId/artifactId/version coordinates.

The best way to solve such kind of problems is to install a repository manager and install the required artifacts into the repository manager.

On the other hand to upload artifacts to maven central is not really a problem.

Upvotes: 4

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