IBM Support

PH25479: JAXRS resource not injecting objects via CDI constructor injection

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APAR status

  • Closed as program error.

Error description

  • If a customer attempts to perform CDI injection using the
    @Inject annotation on the constructor of a JAX-RS resource
    class, injection will not occur unless the class is
    annotated with a CDI scope annotation. Previously, user's
    did not have to annotate their classes.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  ALL                                         *
    ****************************************************************
    * PROBLEM DESCRIPTION: JAX-RS applications which use CDI       *
    *                      constructor injection to inject fields  *
    *                      into their JAX-RS resource class do not *
    *                      perform injection resulting in a        *
    *                      NullPointerException when the field is  *
    *                      used.                                   *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    Customer's application code throws a NullPointerException and
    the JAX-RS request returns an HTTP 500 when attempting to use an
    object in their JAX-RS resource class which is injected via CDI
    constructor injection.
    
    @Path("cdiresource")
    public class CDIResource { // This is a JAX-RS resource class
    
        private ClassA classA; // This object never gets injected
    
        public CDIResource() {}
    
        @Inject
        public CDIResource(ClassA classA) {
            this.classA = classA;
        }
    
        @GET
        @Path("get")
        @Produces(MediaType.APPLICATION_JSON)
        public Response get() {
            return Response.ok().entity(classA.message()).build();
    /// NullPointerException trying to call classA.message()
        }
    }
    

Problem conclusion

  • To perform CDI constructor injection on JAX-RS resource classes,
    reverted to getting the object from CDI the old way when the
    class is not a Weld proxy.
    
    The fix for this APAR is currently targeted for inclusion in fix
    pack 20.0.0.6.  Please refer to the Recommended Updates page for
    delivery information:
    http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
    

Temporary fix

  • Annotate the JAX-RS resource class with the @Dependent CDI
    annotation.
    

Comments

APAR Information

  • APAR number

    PH25479

  • Reported component name

    WAS LIBERTY COR

  • Reported component ID

    5725L2900

  • Reported release

    CD0

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2020-05-15

  • Closed date

    2020-05-21

  • Last modified date

    2020-06-02

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

Fix information

  • Fixed component name

    WAS LIBERTY COR

  • Fixed component ID

    5725L2900

Applicable component levels

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSD28V","label":"WebSphere Application Server Liberty Core"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

Modified date:
02 June 2020