java - 定制 Jersey 注入(inject)

Question

我找不到在 Jersey 资源中注入(inject)对象的正确方法。

我已经定义了这个提供者:

@Provider
public class UpsellPaymentProvider implements InjectableProvider<Context, UpsellPaymentService>{

    private final Log log = LogFactory.getLog(getClass());
    
    public UpsellPaymentProvider(){
        log.info("Provider is instanced");
    }
    
    @Override
    public ComponentScope getScope() {
        return ComponentScope.PerRequest;
    }

    @Override
    public Injectable<UpsellPaymentService> getInjectable(ComponentContext paramComponentContext,
            Context paramA, UpsellPaymentService paramC) {
        log.info("Injecting UpsellPaymentService");
        return new AbstractHttpContextInjectable<UpsellPaymentService>() {
            @Override
            public UpsellPaymentService getValue(HttpContext arg0) {
                return new UpsellPaymentService();
            }
        };
    }

}

正如您在下一个代码中看到的，我有一个 UpsellPaymentService，它应该由 UpsellPaymentProvider 提供:

@Path("/rest/payment/upsell")
public class UpsellResource {

    private final Log log = LogFactory.getLog(getClass());
    @Context // Inject here
    private UpsellPaymentService upsellPaymentService;
    
    @POST
    @Path("/first")
    @Produces(MediaType.TEXT_PLAIN)
    @Consumes(MediaType.APPLICATION_FORM_URLENCODED)
    public Response first(@InjectParam UpsellDto dto, Form allParams){
        // code here
    }
    
}

当我运行测试时，我可以看到提供程序和资源已被发现，但提供程序似乎没有注入(inject):

INFO: Scanning for root resource and provider classes in the packages:example.ws.resources example.ws.providers

11-oct-2013 13:19:34 com.sun.jersey.api.core.ScanningResourceConfig logClassesINFO: Root resource classes found: classexample.ws.resources.UpsellResource

11-oct-2013 13:19:34 com.sun.jersey.api.core.ScanningResourceConfig logClassesINFO: Provider classes found: classexample.ws.providers.UpsellPaymentProvider

...Not important logs...

2013-10-11 13:19:35,092 INFO example.ws.providers.UpsellPaymentProvider.(29)--->Provider is instanced

11-oct-2013 13:19:36 com.sun.jersey.spi.inject.Errors processErrorMessages

GRAVE: The following errors and warnings have been detected withresource and/or provider classes:

SEVERE: Missing dependency for field: privateexample.ws.services.UpsellPaymentServiceexample.ws.resources.UpsellResource.upsellPaymentService

有办法解决这个问题吗？

Answer 1

已解决，按类型更改UpsellPaymentService(InjectableProvider 的第二个泛型)。