Thoughts on development & design

@Service("urlShortenService")
public class UrlShortenService {

       private RestTemplate restTemplate;

       public UrlShortenService() {
              restTemplate = new RestTemplate(ClientHttpRequestFactorySelector.getRequestFactory());
              List<HttpMessageConverter<?>> messageConverters = new ArrayList<HttpMessageConverter<?>>();
              messageConverters.add(new StringHttpMessageConverter());
              messageConverters.add(new MappingJacksonHttpMessageConverter());
              restTemplate.setMessageConverters(messageConverters);
       }
	   
       public String shortenUrl(String url) {
              Map<String, String> request = new HashMap<String, String>();
              request.put("longUrl", url);
              LinkedHashMap<String, String> shortUrl = restTemplate.postForObject("https://www.googleapis.com/urlshortener/v1/url", request, LinkedHashMap.class);
              return shortUrl.get("id");
       }
}

Maven Configuration

	 spring-snapshot
	 Spring Maven Snapshot Repository
	 http://maven.springframework.org/snapshot



	 spring-milestone
	 Spring Maven Milestone Repository
	 http://maven.springframework.org/milestone

	org.springframework.social
	spring-social-web
	${spring-social.version}
	
		
			spring-core
			org.springframework
		
		
			spring-web
			org.springframework
		
		
			spring-webmvc
			org.springframework
		
	



	org.springframework.social
	spring-social-github
	${spring-social-github.version}



	org.springframework.social
	spring-social-twitter
	${spring-social-twitter.version}

Storing User Connection Details

public class HibernateUsersConnectionRepository implements UsersConnectionRepository { 

public class HibernateConnectionRepository implements ConnectionRepository {

@Entity
@Table(name = "CV_CONNECTION")
public class SocialConnection {

       @Id
       private Long id;
       private String providerId;
       private String providerUserId;
       private String displayName;
       private String profileUrl;
       private String imageUrl;
       private String accessToken;
       private String secret;
       private String refreshToken;
       private Long expireTime;
       private Integer rank;

Configuring the Beans

@Configuration
public class SocialConfiguration {

ConnectionFactoryLocator:

@Bean
public ConnectionFactoryLocator connectionFactoryLocator() {
	  ConnectionFactoryRegistry registry = new ConnectionFactoryRegistry();
	  registry.addConnectionFactory(new GitHubConnectionFactory(gitHubKey, gitHubSecret));
	  registry.addConnectionFactory(new TwitterConnectionFactory(twitterKey, twitterSecret));
	  return registry;
}

UsersConnectionRepository:

@Bean
@Scope(value = "singleton", proxyMode = ScopedProxyMode.INTERFACES)
public UsersConnectionRepository usersConnectionRepository() {
	  HibernateUsersConnectionRepository repository = new HibernateUsersConnectionRepository(connectionFactoryLocator(), Encryptors.noOpText());
	  return repository;
}

ConnectionRepository:

@Bean
@Scope(value = "request", proxyMode = ScopedProxyMode.INTERFACES)
public ConnectionRepository connectionRepository() {
	  Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
	  if (authentication == null) {
			 throw new IllegalStateException("Unable to get a ConnectionRepository: no user signed in");
	  }
	  ApplicationUser user = (ApplicationUser) authentication.getPrincipal();
	  return usersConnectionRepository().createConnectionRepository(String.valueOf(user.getAccountId()));
}

ThirdParty Interfaces:

@Bean
@Scope(value = "request", proxyMode = ScopedProxyMode.INTERFACES)
public Twitter twitter() {
	if (connectionRepository().findPrimaryConnection(Twitter.class) != null) {
		return connectionRepository().findPrimaryConnection(Twitter.class).getApi();
	}
	return null;
}

Using the Interfaces

@Autowired
private Twitter twitter;
public void postTweet(String content) {
	  twitter.timelineOperations().updateStatus(content);
}