How to handle no data found when calling restTemplate.getForObject

Question

I am calling restTemplate.getForObject to retrieve a certain value from Mongo DB. How to deal the exception if the expected data is not found in the DB?

Object[] mongodata = restTemplate.getForObject(resulturl,Object[].class,keyval);
list = Arrays.asList(mongodata);

where keyval is a string that contains a json and resulturl is the url for calling mongo

can you share sample code you did – Prashant Thorat Jan 27 '20 at 05:20 — Prashant Thorat, Jan 27 '20 at 05:20
@PrashantThorat : Have added. can you check now? – Thira Jan 27 '20 at 05:25 — Thira, Jan 27 '20 at 05:25

score 1 · Accepted Answer · answered Jan 27 '20 at 07:14

1

Basically, you have two main options:

Simply wrap the RestTemplate call in a try-catch block and handle the error (in case of 404 not found response, it would be the HttpClientErrorException). Something like

try {
  Object[] mongodata = restTemplate.getForObject(resulturl,Object[].class,keyval);
  list = Arrays.asList(mongodata);
} catch (HttpClientErrorException e) {
  if (e.getStatusCode() == HttpStatus.NOT_FOUND) {
    // Do something
  } else {
    throw e;
  } 
}

Implement a ResponseErrorHandler.

See this post on Baeldung for an example.

answered Jan 27 '20 at 07:14

kidney

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Only the line with the getForObject() need to be inside try? – Thira Jan 27 '20 at 07:16
Yes, just make sure variables are initialized in correct scopes. – kidney Jan 27 '20 at 09:06
Glad it helped. Feel free to accept the answer so that others know that it has been solved. – kidney Jan 30 '20 at 08:08
You should be able to also mark the answer as accepted - https://stackoverflow.com/help/someone-answers – kidney Jan 30 '20 at 09:27

How to handle no data found when calling restTemplate.getForObject

1 Answers1