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https://issues.apache.org/jira/browse/MNG-7662?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17654973#comment-17654973
]
ASF GitHub Bot commented on MNG-7662:
-------------------------------------
gnodet commented on PR #948:
URL: https://github.com/apache/maven/pull/948#issuecomment-1372252880
Also, there is an existing workaround which I think I've used somewhere, but
I can't recall where exactly.
The idea is to define two beans:
```
@Named
@Singleton
class MyLazyGraphBuilder implements GraphBuilder {
@Inject
private final PlexusContainer container;
private GraphBuilder delegate() {
return container.lookup(GraphBuilder.class, "myGraphBuilder");
}
Result<? extends ProjectDependencyGraph> build(MavenSession session) {
return delegate().build(session);
}
}
@Named("myGraphBuilder")
@SessionScoped
class MyGraphBuilder implements GraphBuilder {
...
}
```
I still think this should be done automatically, but not sure I'll have the
time to dig much into sisu/guice...
It may be preferable to use the workaround which will work on any maven
version imho.
> Allow Graphbuilder to use session scoped components
> ---------------------------------------------------
>
> Key: MNG-7662
> URL: https://issues.apache.org/jira/browse/MNG-7662
> Project: Maven
> Issue Type: Bug
> Reporter: Christoph Läubrich
> Priority: Major
>
> Currently DefaultMaven gets the Graphbuilder injected as a strict requirement
> at a very early stage. This leads to the problem, that a GraphBuilder
> implementation can not use any SessionScoped Components (because the session
> scope is not setup yet).
> The error then is
> {code:java}
> 1) Error in custom provider, com.google.inject.OutOfScopeException: Cannot
> access Key[type=org.apache.maven.execution.MavenSession, annotation=[none]]
> outside of a scoping block
> at
> org.apache.maven.session.scope.internal.SessionScopeModule.configure(SessionScopeModule.java:64)
> (via modules: org.eclipse.sisu.wire.WireModule ->
> org.apache.maven.session.scope.internal.SessionScopeModule)
> while locating org.apache.maven.execution.MavenSession
> for the 1st parameter of
> org.eclipse.tycho.helper.PluginRealmHelper.<init>(Unknown Source)
> at ClassRealm[coreExtension>org.eclipse.tycho:tycho-build:${tycho-version},
> parent: ClassRealm[plexus.core, parent: null]] (via modules:
> org.eclipse.sisu.wire.WireModule ->
> org.eclipse.sisu.plexus.PlexusBindingModule)
> while locating org.eclipse.tycho.helper.PluginRealmHelper
> at ClassRealm[coreExtension>org.eclipse.tycho:tycho-build:${tycho-version},
> parent: ClassRealm[plexus.core, parent: null]] (via modules:
> org.eclipse.sisu.wire.WireModule ->
> org.eclipse.sisu.plexus.PlexusBindingModule)
> while locating org.eclipse.tycho.p2maven.InstallableUnitGenerator
> at ClassRealm[coreExtension>org.eclipse.tycho:tycho-build:${tycho-version},
> parent: ClassRealm[plexus.core, parent: null]] (via modules:
> org.eclipse.sisu.wire.WireModule ->
> org.eclipse.sisu.plexus.PlexusBindingModule)
> while locating org.eclipse.tycho.p2maven.MavenProjectDependencyProcessor
> while locating org.eclipse.tycho.build.TychoGraphBuilder
> {code}
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