Re: How to set the HttpHeader in the base class of a singleton resource

[Sergey Beryozkin]

Hi

On 29/02/12 18:16, cganesan wrote:
Hi
I'd like the base class of a resource class to store the injected
HttpHeaders property. The resource class is a singleton and I'm using spring
appl context to load the beans. I'm using following sample code where the
HttpHeaders is not getting injected

Base Class:
=============
@Context
private HttpHeaders httpHeaders;

public abstract class BaseResource {

     public String getHeaderProperty(String key) {
        // retrieve string property value from httpHeaders;
     }


}


Resource Class
=============
@Path("/customer/{id}")
public TestResource extends BaseResource {

@POST
@Consumes(MediaType.APPLICATION_JSON)
@Path("/media")

   public Response postMedia() {

     // fetch http header property
      String str = getHeaderProperty("key");
   }
}

Does the base class need to be a Root resource (have a @Path injected) for
this to work?  Any help is appreciated.

This should work unless you have Spring Security or similar proxifying 
the root resource class...
If so then start from introducing a dedicated setter:

> Base Class:
> =============
>
> public abstract class BaseResource {
       // drop @Context here
       private HttpHeaders httpHeaders;

       @Context
       public void setHttpHeaders(HttpHeaders headers) {
           httpHeaders = headers;
       }

>
>
> }

if that does not work still then introduce a dedicated interface:

public interface Contexts {
     @Context
     void setHttpHeaders(HttpHeaders headers);
}

public abstract class BaseResource implements Contexts {
       public void setHttpHeaders(HttpHeaders headers) {
           httpHeaders = headers;
       }
}

that should definitely work :-)

HTH, SErgey


Thanks
Chandru

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