Add Listener Interceptor to FileService

Hi all
Any idea how to add interceptor to FileService
In my case I want intercept every upload call

@POST
@Path(“upload”)
@Produces(MediaType.APPLICATION_JSON)
@Consumes(MediaType.APPLICATION_OCTET_STREAM)
@Transactional
public javax.ws.rs.core.Response upload(
@HeaderParam(“X-File-Id”) String fileId,
@HeaderParam(“X-File-Name”) String fileName,
@HeaderParam(“X-File-Type”) String fileType,
@HeaderParam(“X-File-Size”) Long fileSize,
@HeaderParam(“X-File-Offset”) Long fileOffset,
InputStream stream) {

Regards
Fabio