java - Spring Boot how to ignore HttpStatus Exceptions -

i'm building application using spring boot. application distributed, means have multiple api's call each others.

one of underlying services interacts database , responds requested data. if request unexisting id made, response 404 httpstatus:

return new responseentity<>(httpstatus.not_found); 

(same 400 error on operations, or 204 deleting entry etc).

the problem have other spring boot applications call these api's, throw org.springframework.web.client.httpclienterrorexception: 404 not found exception when request, in example, unexisting entry. 404 status code intended , should not return exception (causing hystrix circuit breaker call fallback function).

how can solve problem?

the call service implemented in code: responseentity<object> data = resttemplate.getforentity(url, object.class);

my resttemplate set this:

private resttemplate resttemplate = new resttemplate(); 

spring's resttemplate uses responseerrorhandler handle errors in responses. interface provides both way determine if response has error (responseerrorhandler#haserror(clienthttpresponse)) , how handle (responseerrorhandler#handleerror(clienthttpresponse)).

you can set resttemplate's responseerrorhandler resttemplate#seterrorhandler(responseerrorhandler) javadoc states

by default, resttemplate uses defaultresponseerrorhandler.

this default implementation

[...] checks status code on clienthttpresponse: code series httpstatus.series.client_error or httpstatus.series.server_error considered error. behavior can changed overriding haserror(httpstatus) method.

in case of error, throws exception seeing.

if want change behavior, can provide own responseerrorhandler implementation (maybe overriding defaultresponseerrorhandler) doesn't consider 4xx error or doesn't throw exception.

for example

resttemplate.seterrorhandler(new responseerrorhandler() {     @override     public boolean haserror(clienthttpresponse response) throws ioexception {         return false; // or whatever consider error     }      @override     public void handleerror(clienthttpresponse response) throws ioexception {         // nothing, or     } }); 

you can check status code of responseentity returned getforentity , handle yourself.