public Response getContainerDifferential()

in eureka-core/src/main/java/com/netflix/eureka/resources/ApplicationsResource.java [201:251]
41 lines of code
9 McCabe index (conditional complexity)

    public Response getContainerDifferential(
            @PathParam("version") String version,
            @HeaderParam(HEADER_ACCEPT) String acceptHeader,
            @HeaderParam(HEADER_ACCEPT_ENCODING) String acceptEncoding,
            @HeaderParam(EurekaAccept.HTTP_X_EUREKA_ACCEPT) String eurekaAccept,
            @Context UriInfo uriInfo, @Nullable @QueryParam("regions") String regionsStr) {

        boolean isRemoteRegionRequested = null != regionsStr && !regionsStr.isEmpty();

        // If the delta flag is disabled in discovery or if the lease expiration
        // has been disabled, redirect clients to get all instances
        if ((serverConfig.shouldDisableDelta()) || (!registry.shouldAllowAccess(isRemoteRegionRequested))) {
            return Response.status(Status.FORBIDDEN).build();
        }

        String[] regions = null;
        if (!isRemoteRegionRequested) {
            EurekaMonitors.GET_ALL_DELTA.increment();
        } else {
            regions = regionsStr.toLowerCase().split(",");
            Arrays.sort(regions); // So we don't have different caches for same regions queried in different order.
            EurekaMonitors.GET_ALL_DELTA_WITH_REMOTE_REGIONS.increment();
        }

        CurrentRequestVersion.set(Version.toEnum(version));
        KeyType keyType = Key.KeyType.JSON;
        String returnMediaType = MediaType.APPLICATION_JSON;
        if (acceptHeader == null || !acceptHeader.contains(HEADER_JSON_VALUE)) {
            keyType = Key.KeyType.XML;
            returnMediaType = MediaType.APPLICATION_XML;
        }

        Key cacheKey = new Key(Key.EntityType.Application,
                ResponseCacheImpl.ALL_APPS_DELTA,
                keyType, CurrentRequestVersion.get(), EurekaAccept.fromString(eurekaAccept), regions
        );

        final Response response;

        if (acceptEncoding != null && acceptEncoding.contains(HEADER_GZIP_VALUE)) {
             response = Response.ok(responseCache.getGZIP(cacheKey))
                    .header(HEADER_CONTENT_ENCODING, HEADER_GZIP_VALUE)
                    .header(HEADER_CONTENT_TYPE, returnMediaType)
                    .build();
        } else {
            response = Response.ok(responseCache.get(cacheKey)).build();
        }

        CurrentRequestVersion.remove();
        return response;
    }