Error Spring React REST Controller Using Custom Class Response (WebFlux) - spring

Question

I'm trying to build a Spring WebFlux project and realize the follow business logic:
1 - Call an external REST Api using WebClient and parse the Json results using the Models below. It is working OK
2 - To show the Mono results Mono<DeviceList> devices, I'm using the ResponseApi class and returning it, but it is NOT working
I'm getting the follow error:
Response status 406 with reason "Could not find acceptable representation"
Thanks
# Json Result
{
"data": [
{
"id": "5bc3c0efe833d93f401bafa8",
"name": "XXXXX",
"group": "5b8fd1fa0499f54cfa7febb8",
"description": "Geolocalizacao gps",
"payloadType": "None",
"contract": "5bc08be5e833d93f40e1f936",
"keepAlive": 0
}
]
}
# Controller
public class DeviceController{
...
...
#RequestMapping(value = V1 + BASE_URL + "/devices/types", method = GET, produces = APPLICATION_JSON)
public Mono<ServerResponse> getDeviceTypes(){
Mono<DeviceList> devices = deviceService.findDeviceTypes();
ResponseApi r = new ResponseApi();
r.setMessage("Test");
r.setCode("200");
r.setStatus(200);
r.setData(devices);
return ok().body(Mono.just(r), ResponseApi.class);
}
}
# Repository
public Mono<DeviceList> findDeviceTypes() {
return webClient.get()
.uri(DEVICE_TYPES_URL)
.accept(MediaType.APPLICATION_JSON)
.retrieve()
.bodyToMono(DeviceList.class);
}
# Model
public class DeviceList{
#JsonProperty("data")
private List<Device> data;
public List<Device> getData() {
return data;
}
public void setData(List<Device> data) {
this.data = data;
}
}
public class Device{
#JsonProperty("id")
private String id;
#JsonProperty("name")
private String name;
#JsonProperty("group")
private String group;
#JsonProperty("description")
private String description;
#JsonProperty("keepAlive")
private Integer keepAlive;
#JsonProperty("payloadType")
private String payloadType;
#JsonProperty("contract")
private String contract;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getGroup() {
return group;
}
public void setGroup(String group) {
this.group = group;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public Integer getKeepAlive() {
return keepAlive;
}
public void setKeepAlive(Integer keepAlive) {
this.keepAlive = keepAlive;
}
public String getPayloadType() {
return payloadType;
}
public void setPayloadType(String payloadType) {
this.payloadType = payloadType;
}
public String getContract() {
return contract;
}
public void setContract(String contract) {
this.contract = contract;
}
}
#JsonRootName("data")
public class ResponseApi{
#JsonProperty("status")
private Integer status;
#JsonProperty("code")
private String code;
#JsonProperty("message")
private String message;
#JsonProperty("data")
private Object data;
public Integer getStatus() {
return status;
}
public void setStatus(Integer status) {
this.status = status;
}
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public Object getData() {
return data;
}
public void setData(Object data) {
this.data = data;
}
}

Answer 1

You can get devices, then in non blocking way, map them to the ResponseApi like that:
#RequestMapping(value = V1 + BASE_URL + "/devices/types", method = GET, produces = APPLICATION_JSON)
public Mono<ServerResponse> getDeviceTypes(){
return deviceService.findDeviceTypes()
.flatMap(devices -> {
ResponseApi r = new ResponseApi();
r.setMessage("Test");
r.setCode("200");
r.setStatus(200);
r.setData(devices);
return ok().body(Mono.just(r), ResponseApi.class);
});
}