Issue research about hydra-fragments

[kevindeyne]

One way to get rid of the double rendering is:

    default Mono<ServerResponse> defaultRender(ServerRequest request,
                                               Route route,
                                               SecurityContext securityContext,
                                               Renderer renderer,
                                               SessionMemoryRepository sessionMemoryRepository) {
        Route.URIs.add(request.uri().getScheme() + "://" + request.uri().getAuthority());

        final Session session = new Session(route, request);
        return route.getSetupAttributes(request, session).flatMap(sAttributes -> {
            session.setLastParameters(sAttributes);
            Mono<DataBuffer> bufferMono = DataBufferUtils.join(renderer.render(route.getTemplateHTML(), session));
            return bufferMono.flatMap(r -> {
                session.setLastRenderedHTML(FluxUtils.dataBufferToString(r));
                sessionMemoryRepository.store(session);
                return ok().contentType(MediaType.TEXT_HTML).body(Flux.just(FluxUtils.stringToDataBuffer(session.getLastRenderedHTML())), DataBuffer.class);
            });
        });
    }

[kevindeyne]

And a better way, to remove the back and forth between buffer -> string -> buffer:

    default Mono<ServerResponse> defaultRender(ServerRequest request,
                                               Route route,
                                               SecurityContext securityContext,
                                               Renderer renderer,
                                               SessionMemoryRepository sessionMemoryRepository) {
        Route.URIs.add(request.uri().getScheme() + "://" + request.uri().getAuthority());

        final Session session = new Session(route, request);
        return route.getSetupAttributes(request, session).flatMap(sAttributes -> {
            session.setLastParameters(sAttributes);
            Mono<DataBuffer> bufferMono = DataBufferUtils.join(renderer.render(route.getTemplateHTML(), session));
            return bufferMono.flatMap(r -> {
                String renderedHTML = FluxUtils.dataBufferToString(r);
                session.setLastRenderedHTML(renderedHTML);
                sessionMemoryRepository.store(session);
                return ok().contentType(MediaType.TEXT_HTML).body(Mono.just(renderedHTML), String.class);
            });
        });
    }

[kevindeyne]

See https://github.com/medusa-ui/medusa/pull/518/files