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https://issues.apache.org/jira/browse/CXF-6694?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15033478#comment-15033478
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Sergey Beryozkin commented on CXF-6694:
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This is related to this JAX-RS spec text: "Provider classes that are
instantiated by the JAX-RS runtime and MUST have a public constructor for which
the JAX-RS runtime *can provide all parameter values*. Note that a zero
argument constructor is permissible under this rule.". But perhaps that can be
relaxed for singletons instantiated by Spring if a non-default constructor has
no @Context parameters
> SpringResourceFactory does not work with constructor-autowired beans
> --------------------------------------------------------------------
>
> Key: CXF-6694
> URL: https://issues.apache.org/jira/browse/CXF-6694
> Project: CXF
> Issue Type: Bug
> Components: JAX-RS
> Affects Versions: 3.1.4
> Reporter: Vladimir Kulev
> Labels: spring
>
> When used with constructor-autowired bean, it fails with "Resource class ...
> has no valid constructor" exception. We don't need constructor at all when we
> already have a singleton instance from Spring.
> Also it looks like {{isSingleton()}} is called for the first time before
> correct value is calculated a few lines below: {{isSingleton =
> ac.isSingleton(beanId)}}
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