[jira] [Created] (MNG-6575) make Dependency immutable

["Hervé Boutemy (JIRA)" <ji...@apache.org>]

Hervé Boutemy created MNG-6575:
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             Summary: make Dependency immutable
                 Key: MNG-6575
                 URL: https://issues.apache.org/jira/browse/MNG-6575
             Project: Maven
          Issue Type: Improvement
          Components: Dependencies, Inheritance and Interpolation
    Affects Versions: 3.6.0
            Reporter: Hervé Boutemy


while working on Maven memory consumption issue MNG-6571, once VersionRange is made immutable, memory used was divided by 2: the next big expected win is to make Dependency immutable, which would probably once again divide memory by 2 because the vast majority of time, dependencies (be it in dependencyManagement or base dependencies) are inherited without any modification

this will require to change [ModelMerger|https://maven.apache.org/ref/3.6.0/maven-model/apidocs/org/apache/maven/model/merge/ModelMerger.html] 's {{mergeDependency(Dependency target, Dependency source, boolean sourceDominant, Map<Object,Object> context)}} signature, since is not really an immutable friendly signature
and also make [Dependency code|https://maven.apache.org/ref/3.6.0/maven-model/apidocs/org/apache/maven/model/Dependency.html] immutable (generated by Modello)




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