JAX-RS - @Priority Examples

@Priority(1)
@Provider
public class InvalidRequestFilter implements ContainerRequestFilter {

    @Override
    public void filter(ContainerRequestContext reqContext) throws IOException {
        Response responseForInvalidRequest = validateRequest(reqContext);
        if (responseForInvalidRequest != null) {
            reqContext.abortWith(responseForInvalidRequest);
        }
    }

    private Response validateRequest(ContainerRequestContext reqContext) {
        UriInfo uriInfo = reqContext.getUriInfo();
        String path = uriInfo.getPath();
        if (path.equals("orders/history")) {
            String msg = String.format("The feature is not yet supported: %s%n", path);
            CacheControl cc = new CacheControl();
            cc.setNoStore(true);
            Response response = Response.status(Response.Status.NOT_IMPLEMENTED)
                                        .cacheControl(cc)
                                        .entity(msg)
                                        .build();
            return response;
        }
        return null;
    }
}

@Priority(2)
@Provider
public class LogFilter implements ContainerRequestFilter, ContainerResponseFilter {

    @Override
    public void filter(ContainerRequestContext reqContext) throws IOException {
        System.out.println("-- request info --");
        UriInfo uriInfo = reqContext.getUriInfo();
        log(uriInfo, reqContext.getHeaders());
    }

    @Override
    public void filter(ContainerRequestContext reqContext,
                       ContainerResponseContext resContext) throws IOException {
        System.out.println("-- response info --");
        UriInfo uriInfo = reqContext.getUriInfo();
        log(uriInfo, resContext.getHeaders());
    }

    private void log(UriInfo uriInfo, MultivaluedMap<String, ?> headers) {
        System.out.println("Path: " + uriInfo.getPath());
        System.out.println("HEADERS:");
        headers.entrySet().forEach(h -> System.out.println(h.getKey() + ": " + h.getValue()));
    }
}