[JAV-147]RestTemplate支持扩展

[liubao68]

No description provided.

[coveralls]

Coverage increased (+0.07%) to 82.062% when pulling 9b31c6f on liubao68:discover into 9085931 on ServiceComb:master.

[seanyinx]

a better design is to declare default rest template and avoid null checking all together

class RestTemplateWrapper implements RestOperations {
  private static final RestTemplate defaultTemplate =  new RestTemplate();
  private static List<AcceptableRestTemplate> acceptableRestTemplates = asList(new CseRestTemplate());

    private RestTemplate getRestTemplate(String url) {
        for (AcceptableRestTemplate template : acceptableRestTemplates) {
            if (template.isAcceptable(url)) {
                return template;
            }
        }
        return defaultTemplate;
    }
}

[seanyinx]

and i don't understand why these methods need to be static. we have way too many static classes/methods. this kind of programming model creates tons of tight coupling.

[seanyinx]

this test only covers the happy path. what about no acceptable rest template found?

[coveralls]

Coverage increased (+1.5%) to 83.462% when pulling 415236a on liubao68:discover into 9085931 on ServiceComb:master.

[WillemJiang]

It could be better if we can wrap the NPE with some kind of Runtime exception.