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https://issues.apache.org/jira/browse/MRESOLVER-602?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17880725#comment-17880725
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Tamas Cservenak commented on MRESOLVER-602:
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Nice catch!
Yes, class can be any class that is used in conjunction with:
https://github.com/apache/maven-resolver/blob/32844e4eb8d444838953f1d49be2ecb71db15b78/maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/PrioritizedComponents.java
And yes, those are usually *Factory classes, usually having priority defined,
like:
https://github.com/apache/maven-resolver/blob/master/maven-resolver-spi/src/main/java/org/eclipse/aether/spi/connector/transport/TransporterFactory.java
> Documentation for aether.priority.<class> has disappeared
> ---------------------------------------------------------
>
> Key: MRESOLVER-602
> URL: https://issues.apache.org/jira/browse/MRESOLVER-602
> Project: Maven Resolver
> Issue Type: Bug
> Components: Resolver
> Affects Versions: 2.0.1
> Reporter: Didier Loiseau
> Priority: Major
>
> Property {{aether.priority.<class>}} is not documented any more [in v2.0.1 of
> the
> documentation|https://maven.apache.org/resolver-archives/resolver-2.0.1/configuration.html],
> but it was [in version
> 1.9|https://maven.apache.org/resolver-archives/resolver-1.9.22/configuration.html].
> This change appears to be coming from commit
> [7318c95|https://github.com/apache/maven-resolver/commit/7318c95ae28df9a49d962a1a2c748d628f512ae2]
> which has regenerated the documentation (according to commit message).
> Note that the previous documentation was not very good already, since it did
> not give any pointers to what are the possible {{<class>}} values, nor what
> kind of values it expects:
> {quote}The priority to use for a certain extension class. {{class}} can
> either be the fully qualified name or the simple name stands for fully
> qualified class name. If the class name ends with {{Factory}} that suffix
> could optionally be left out.
> {quote}
> For resolver 1.9, I found some possible values
> [here|https://github.com/apache/maven/blob/a98d530e338b54dadefc45b37c40094a84d12ae7/maven-core/src/main/java/org/apache/maven/internal/aether/DefaultRepositorySystemSessionFactory.java#L111-L117],
> more specifically {{WagonTransporterFactory}} has a default priority of -1
> and {{HttpTransporterFactory}} has 5 (more transporters are available in
> maven-resolver 2.x). I also found that {{DefaultTransporterProvider}} will
> log the used transporter class name when running maven with {{{}-X{}}}, using
> a message like
> {quote}Using transporter WagonTransporter with priority 1000.0
> {quote}
> Expected values appear to be float numbers.
> I didn’t check if other properties are missing (I wouldn’t know if they are
> still be relevant in 2.x anyway).
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