java:S3306 false positive on MicroProfile Config injection

SonarQube
, ,
1

Sonarqube configuration

  • Developer Edition
  • Version 8.9.8 (build 54436)

Problem description

Eclipse MicroProfile Config specification allows only field injection. Constructor injection is not available.
Exemple :

    @Inject
    @ConfigProperty(name="myprj.some.url")
    private String someUrl;

So I think that the rule java:S3306 " Constructor injection should be used instead of field injection" is not relevant in that case.

Otherwise, as I’m using this in an ejb Singleton annotated @Startup, I can’t turn the default constructor ‘private’ because it raise an exception :

[INFO] [ERROR   ] CWWKZ0004E: Une exception s'est produite lors du démarrage de l'application XXX. Le message d'exception était : com.ibm.ws.container.service.state.StateChangeException: com.ibm.ws.cdi.CDIException: com.ibm.wsspi.injectionengine.InjectionException: com.ibm.ejs.container.EJBConfigurationException: EJB class com.mycompany.MyEJB must have a public constructor that takes no parameters
2

Hi,

We don’t turn that rule on by default because we recognize that its application is not universal. Perhaps you want to deactivate it from your profile?

 
Ann

3

It should be an acceptable solution :grin:
I will pass it at “information” level just as an education purpose. Thanks !

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