RestTemplateBuilder bean

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;