Spring Security Authentication using RestTemplate

Question

I have 2 spring web apps that provide 2 separate set of services. Web App 1 has Spring Security implemented using a user-based authentication.

Now, Web App 2 needs

Answer 1

There's a simple way to do this in case you are someone who's looking for a simple call and not a API consumer.

HttpClient client = new HttpClient();
    client.getParams().setAuthenticationPreemptive(true);
    Credentials defaultcreds = new UsernamePasswordCredentials("username", "password");
    RestTemplate restTemplate = new RestTemplate();
    restTemplate.setRequestFactory(new CommonsClientHttpRequestFactory(client));
    client.getState().setCredentials(AuthScope.ANY, defaultcreds);