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4.7.3 Using Elastic Social Services

Elastic Core uses dependency injection for configuration of components, specifically JSR-330: Dependency Injection for Java and JSR 250: Common Annotations for the Java Platform. These standards are supported by Spring 3.0 and later versions.

Use the @Inject annotation to get Elastic Core and Elastic Social services injected into any Spring Bean. The following example shows a Spring controller which uses the UserService.

import com.coremedia.elastic.core.api.user.User;
import com.coremedia.elastic.core.api.user.UserService;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;
import javax.inject.Inject;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class ExampleController implements Controller {
  @Inject
  private UserService userService;

  public ModelAndView handleRequest(HttpServletRequest request,
        HttpServletResponse response) throws Exception {
    User user = userService.getUserById(
        request.getParameter("userId"));
    response.setContentType("text/plain");
    response.getWriter().format("Hello %s!", user == null ?
        "World" : user.getName());
    return null;
  }
}

Example 4.19. Spring controller with UserService

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