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Changing a 404 response for REST API to a 200 empty response

I have a Spring Boot application written in Java that is a REST API. This service (Svc A) calls a REST API service (Svc B) with is also a Spring Boot Application written in Java. Svc B returns a 404 status code when no data was found. I need to change this response to a 200 status code and return an empty response object. I am not sure if or how to do this.
I can catch the error and determine if the 404 is this no data found error. However, I don't know how to change the response to a 200 empty response.
I am using a FeignClient to call the service. This is the error code that catches the 404:
#Component
public class FeignErrorDecoder implements ErrorDecoder {
Logger logger = LoggerFactory.getLogger(this.getClass());
#Override
public Exception decode(String methodKey, Response response) {
Reader reader = null;
String messageText = null;
switch (response.status()){
case 400:
logger.error("Status code " + response.status() + ", methodKey = " + methodKey);
case 404:
{
logger.error("Error took place when using Feign client to send HTTP Request. Status code " + response.status() + ", methodKey = " + methodKey);
try {
reader = response.body().asReader();
//Easy way to read the stream and get a String object
String result = CharStreams.toString(reader);
logger.error("RESPONSE BODY: " + result);
ObjectMapper mapper = new ObjectMapper();
//just in case you missed an attribute in the Pojo
mapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
//init the Pojo
ExceptionMessage exceptionMessage = mapper.readValue(result,
ExceptionMessage.class);
messageText = exceptionMessage.getMessage();
logger.info("message: " + messageText);
} catch(IOException ex) {
logger.error(ex.getMessage());
}
finally {
try {
if (reader != null)
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return new ResponseStatusException(HttpStatus.valueOf(200), messageText);
}
default:
return new Exception(response.reason());
}
}
}
I can change the status code to a 200 and it returns a 200 but I need to the response to have an empty response object.
The above code will return this response body of an error response object:
{
"statusCd" : "200",
"message" : "The Location not found for given Location Number and Facility Type Code",
"detailDesc" : "The Location not found for given Location Number and Facility Type Code. Error Timestamp : 2020-01-31 18:19:13"
}
I need it to return a response body like this:
200 - Empty Response
{
"facilityNumber": "923",
"facilityTimeZone": null,
"facilityAbbr": null,
"scheduledOperations": []
}

In case 404 just try
return new ResponseStatusException(HttpStatus.valueOf(200));

For anyone that has to do something this crazy...here is my solution:
Removed the FeignErrorCode file.
Added an exception to ControllerAdvice class like this:
#ExceptionHandler(FeignException.class)
public ResponseEntity<?> handleFeignException(FeignException fe, WebRequest request) {
ErrorDetails errorDetails = new ErrorDetails(new Date(), HttpStatus.valueOf(fe.status()), fe.getMessage(), request.getDescription(false));
String response = fe.contentUTF8();
if(response != null) {
ScheduledOperationsViewResponse scheduledOperationsViewResponse = new ScheduledOperationsViewResponse();
if (response.contains("Scheduled") || response.contains("Location")) {
HttpHeaders headers = new HttpHeaders();
scheduledOperationsViewResponse.setFacilityNumber(request.getParameter("facilityNumber"));
return new ResponseEntity<ScheduledOperationsViewResponse>(scheduledOperationsViewResponse, headers, HttpStatus.OK);
}
}
return new ResponseEntity<>(errorDetails, errorDetails.getStatus());
}

Angular POST RESTful API to Ejb resulting in 404 not found error

I was having some problem when trying to send RESTful API from Angular to EJB. Here is my component.ts:
this.opUserAdminWinService.retrievePegRoleList().subscribe(resf => {
console.log(resf);
});
And my service.ts:
serviceAPI = SERVER_API_URL;
mainAPI = '/api/securityactivity/securityactivity';
retrievePegRoleList() {
const url: string = this.serviceAPI + this.mainAPI + '/RetrievePegRoleList';
return this.http.post(url, this.httpOptions);
}
In my Controller.java:
#PostMapping("/RetrievePegRoleList")
public Vector RetrievePegRoleList()
throws JaMClientRemoteException, JaMException {
return getSecurityActivity().RetrievePegRoleList();
}
In my EjbBean class:
public Vector RetrievePegRoleList() throws JaMClientRemoteException, JaMException;
#TransactionAttribute(TransactionAttributeType.SUPPORTS)
public Vector RetrievePegRoleList() throws JaMClientRemoteException, JaMException
{
Vector pegRoleList;
try {
String dataSource = JaM.getProperties().ORD_DATA_SOURCE;
RetrievePegRoleListTask retrievePegRoleListTask = new RetrievePegRoleListTask(dataSource);
retrievePegRoleListTask.execute();
pegRoleList = retrievePegRoleListTask.getResult();
} catch (Exception e) {
throw new JaMClientRemoteException(this.ERR_EXCEPTION_JAM, e.toString());
}
return pegRoleList;
}
However, I am getting this error message:
Any ideas why is it so? Thanks!

try this in angular.
export const httpOptions = {
headers: new HttpHeaders({
'Content-Type': 'application/json'
})
};
this.http.post(your-url,your-data, httpOptions);
I always send post like this in angular.
If it doesn't work. You should examine,is there an interceptor in Server.

Angular Post request goes to pending status and does not hit the server

I am trying to get the user list for a email Id using a post request , Sometimes the post request goes to pending status and it stays in the same status forever.If I restart the tomcat then the request works but after some times the same issue occurs.
Below is the post method calling in angular
loadBOEDetailsListByEmail(emailId, password) {
const url = `${environment.url}backofficeemployee/detailsByBoeEmailId/`;
const params = {
resetEmail: emailId
};
const myHeader = new HttpHeaders();
myHeader.append('Content-Type', 'application/x-www-form-urlencoded');
return Observable.create(observer => {
this.http.post(url, params, { headers: myHeader }).subscribe(
(response: any) => {
if (response && response.data && response.data[0] !== undefined) {
this.accountList = response.data;
const boe = response.data[0];
this.checkAccountValidity(boe, password, observer);
} else {
observer.error('No account found');
}
},
() => observer.error('Employee service call failed')
);
});
}
In the java side this is how I am receiving
// Backoffice employee - Details by BoeUserId
#PostMapping(value = "/detailsByBoeEmailId/")
public #ResponseBody Map<String, Object> getBackofficeemployeeDetailsByBoeEmailId(#RequestBody ResetpasswordRequestDto requestDto) {
log.info(" boeEmailId in getBackofficeemployeeDetails {}", requestDto.getResetEmail());
try {
List<BackofficeemployeeResponseDto> backofficeemployeeResponseDto = backofficeemployeeService
.getByBoeEmailId(requestDto.getResetEmail());
return JsonUtils.mapOK(backofficeemployeeResponseDto);
} catch (Exception e) {
log.error("Exception in getBackofficeemployeeDetailsByBoeEmailId", e);
return JsonUtils.mapError(ERROR_MSG + e.getMessage());
}
}

Sending the object in ajax call to spring controller and getting unsupported media type message

I have an ajax call like this
var userList = {
"active": activeUsersId,
"inactive": inactiveUsersId
}
$.ajax({
type: "POST",
data: userList,
url: "/ewaanmapbuilder/rest/user/status",
contentType: "application/json",
success: function (flag) {
if (flag == true) {
$("#messageContainer").text("Status Updated Successfully!");
}
else {
$("#messageContainer").text("Status Updation Failed!");
}
$('#messageContainer').css('display', 'block');
setTimeout(function () { $('#messageContainer').css('display', 'none'); $('.registration-container').css('margin-top', '10%') }, 3000);
}
});
In this ajax call i am sending the userlist as aobject and my spring controller is like this
#ResponseBody
#RequestMapping(value = EwaanMapBuilderConstant.UPDATE_USER_STATUS, method = RequestMethod.POST,consumes= MediaType.APPLICATION_JSON_VALUE)
public boolean updateUserStatus(#RequestBody ActiveUserList userList, HttpServletRequest request) {
try {
HttpSession session = request.getSession();
String adminUserId = session.getAttribute(EwaanMapBuilderConstant.USER_ID).toString();
userService.updateUserStatus(userList, adminUserId);
}
catch(Exception e) {
logger.error("update status failed" +e);
return false;
}
return true;
}
BUt my ajax call gives me "415 (Unsupported Media Type)" error. I have tried so many options but i am not getting where i am going wrong.

how to call spring mvc3 with jquery ajax post between two applications?

I have two web applications hosted on a server. From one I am trying to do $.post to the second application (spring mvc3). I am able to successfully hit the url of the second application but I do not get response back of the ajax call.
App1 JS Code (http://localhost:7777/app1/test.html) -
var serialisedFormData = $("form").serialize();
$.post("http://localhost:8080/app2/doSomething", serialisedFormData, function (data) {
alert("job done");
}, "json");
App2 Java Code -
#RequestMapping(value = "/doSomething")
public #ResponseBody String doSomething(HttpServletRequest request,
#RequestParam("d") String data) {
try {
... do something here ...
return "done";
}
catch (Exception e) {
logger.debug("Exception occured when doing something", e);
return "failure";
}
}

I achieved it by removing "json" type from my jquery post call.
$.post("http://localhost:8080/app2/doSomething", serialisedFormData, function (data) {
alert("job done");
});
and adding a header to my response
#RequestMapping(value = "/doSomething")
public #ResponseBody String doSomething(HttpServletRequest request, HttpServletResponse response, #RequestParam("d") String data)
{
try {
... do something here ...
response.setHeader("Access-Control-Allow-Origin", "*");
return "done";
}
catch (Exception e) {
logger.debug("Exception occured when doing something", e);
return "failure";
}
}