RestTemplateBuilder bean - spring-mvc

Question

My application interfaces with different rest endpoints and each one needs a specialized RestTemplate object. I am using RestTemplateBuilder to create each of the RestTemplate objects. Is it ok to clone the RestTemplateBuilder object provided by spring boot and make the changes?
#Configuration
public class Config {
#Bean
public RestTemplate googleRestTemplate(RestTemplateBuilder restTemplateBuilder) {
return restTemplateBuilder.basicAuthorization("user", "pwd123").build();
}
#Bean
public RestTemplate twitterRestTemplate(RestTemplateBuilder restTemplateBuilder) {
return restTemplateBuilder.setConnectTimeout(5000).build();
}
}
Here, i get the singleton builder bean injected to both the bean methods. The problem i am trying to overcome is that the mutating of the same builder object. In my example, my 2nd rest template does not need basic authorization but i inadvertently get it.

Answer 1

You can differentiate your RestTemplates using #Qualifier annotation like below.
#Configuration
public class Config {
#Bean
#Qualifier("googleRestTemplate")
public RestTemplate googleRestTemplate(RestTemplateBuilder restTemplateBuilder) {
return restTemplateBuilder.basicAuthorization("user", "pwd123").build();
}
#Bean
#Qualifier("twitterRestTemplate")
public RestTemplate twitterRestTemplate(RestTemplateBuilder restTemplateBuilder) {
return restTemplateBuilder.setConnectTimeout(5000).build();
}
}
Then you can use any of RestTemplate beans in your controllers with these #Qualifiers.
#Autowired
#Qualifier("googleRestTemplate")
private RestTemplate restTemplate;

Answer 2

Why would you do that?
Add a config class:
#Configuration
class Config {
#Bean
#Scope(value = WebApplicationContext.SCOPE_REQUEST, proxyMode = ScopedProxyMode.TARGET_CLASS)
RestTemplate restTemplate(RestTemplateBuilder restTemplateBuilder) {
return restTemplateBuilder.build();
}
}
inside your Controller that will consume your end-points:
#Autowired
RestTemplate restTempl;
#RequestMapping(value = "/consume", method = RequestMethod.POST)
public void samplePostMethod() {
HttpHeaders headers = new HttpHeaders();
HttpEntity<String> entity = new HttpEntity<String>("Data", headers);
RequestDetails requestDetails = new RequestDetails("http://localhost:8082/endpoint1", HttpMethod.POST);
ResponseEntity<String> response = restTempl.exchange(requestDetails.getUrl(), requestDetails.getRequestType(),
entity, String.class);
RequestDetails requestDetailss = new RequestDetails("http://localhost:8082/endpoint2", HttpMethod.POST);
ResponseEntity<String> responses = restTempl.exchange(requestDetailss.getUrl(), requestDetailss.getRequestType(),
entity, String.class);
logger.log("{} {}", response, responses);
return response.getBody();
}