Client Application

SampleClient.java

@Service
class SampleClient {

    @Value("${app.access-url}")
    private String endpoint;

    private RestTemplate restTemplate;

    public SampleClient(RestTemplate restTemplate) {
        this.restTemplate = restTemplate;
    }

    void setRestTemplate(RestTemplate restTemplate) {
        this.restTemplate = restTemplate;
    }

    String getData() {
        return restTemplate.getForObject(endpoint, String.class);
    }
}