Exchange RestTemplate giving 400 Bad Request - resttemplate

Question

I am using exchange for GET method in RestTemplate. But while passing the requestEntity in the exchange method i am getting 400-Bad Request.
Below is the code I am using.
Producing an URL:
#GetMapping("/getValues")
public ResponseEntity<ValueResponse> getValueCall(#RequestBody AccountDTO accountDTO) {
Map<Integer, ValueEntity> crmMap = new HashMap<Integer, ValueEntity>();
int accountNumber = accountDTO.getAccountNumber();
valueMap.put(1, new ValueEntity("A", "B", "Tier 1", "DU", "Indian"));
valueMap.put(2, new CRMEntity("C", "D", "Tier 2", "DU", "American"));
valueMap.put(3, new CRMEntity("E", "F", "Tier 3", "DU", "English"));
valueMap.put(4, new CRMEntity("G", "H", "Tier 1", "DU", "Australian"));
ValueResponse valueResponse = new ValueResponse();
for (Map.Entry<Integer, ValueEntity> entry : valueMap.entrySet()) {
if (entry.getKey().equals(accountNumber)) {
valueResponse.setAccountNumber(entry.getKey());
valueResponse.setFirstName(entry.getValue().getFirstName());
valueResponse.setLastName(entry.getValue().getLastName());
valueResponse.setCustomerTier(entry.getValue().getCustomerTier());
valueResponse.setCustomerType(entry.getValue().getCustomerType());
valueResponse.setNationality(entry.getValue().getNationality());
return new ResponseEntity<ValueResponse>(valueResponse, HttpStatus.OK);
}
}
return null;
}
Consuming the URL:
public EnrollResponse enrollingUser(ValueDTO valueDTO) {
MultiValueMap<String, String> headers = new LinkedMultiValueMap<String,
String>();
headers.add("Content-Type", "application/json");
HttpEntity<ValueDTO> requestEntity = new HttpEntity<ValueDTO>(valueDTO,
headers);
ResponseEntity<ValueResponse> enrollResponseEntity =
restTemplate.exchange("http://localhost:8080/getValues",
HttpMethod.GET, requestEntity, ValueResponse.class);
return enrollResponseEntity.getBody();
}
Entity and DTO:
public class ValueDTO {
private String firstName;
private String lastName;
private String dateOfBirth;
private String gender;
private String nationality;
private String email;
private String channelId;
private int accountNumber;
private String languageKnown;
//constructor
//getters and setters
}
public class ValueResponse {
private long accountNumber;
private String firstName;
private String lastName;
private String customerTier;
private String customerType;
private String nationality;
//constructor
//getters and setters
}
public class ValueEntity {
private String firstName;
private String lastName;
private String customerTier;
private String customerType;
private String nationality;
//constructor
//getters and setters
}
I tried accessing the producer URL from postman with Header as Content-Type:application/json and Body:
{
"firstName":"A",
"lastName" : "B",
"dateOfBirth" : "12/12/12",
"gender" : "Female",
"nationality" : "Indian",
"email" : "abc#gmail.com",
"channelId" :"Values App",
"accountNumber" : 1,
"languageKnown" : "English"
}
as the valueDto object.
Console:
org.springframework.web.client.HttpClientErrorException$BadRequest: 400 null
at org.springframework.web.client.HttpClientErrorException.create(HttpClientErrorException.java:79)
at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:122)
at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:102)
at org.springframework.web.client.ResponseErrorHandler.handleError(ResponseErrorHandler.java:63)
at org.springframework.web.client.RestTemplate.handleResponse(RestTemplate.java:778)
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:736)
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:670)
at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:579)
at com.smilesmember.domain.AccountDomain.enrollingUser(AccountDomain.java:184)
at com.smilesmember.controller.SmilesMemberController.enrollWS(SmilesMemberController.java:50)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)

Answer 1

try the below code if it accepts ValueDTO as you mentioned
ResponseEntity<ValueResponse> enrollResponseEntity =
restTemplate.exchange("http://localhost:8080/getValues",
HttpMethod.GET, requestEntity, new ParameterizedTypeReference<ValueResponse>() {});