Expose a Spring service via REST/JSON

SampleServiceController.java

package laccetti.sample.controller;

import lombok.extern.slf4j.Slf4j;

import javax.annotation.PostConstruct;
import javax.servlet.http.HttpServletRequest;

import laccetti.sample.model.SearchRequest;
import laccetti.sample.model.SearchResponse;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
@RequestMapping("/sample")
@Slf4j
public class SampleServiceController extends AbstractController {
  @Autowired
  private SampleService sampleService;

  public SampleServiceController() {
    // empty
  }

  @PostConstruct
  public void init() {
    // nothing here, but hey, let's just waste some time
  }

  @RequestMapping(value = "/search", method = RequestMethod.POST, produces = "application/json")
  @ResponseBody
  public SearchResponse search(@RequestBody SearchRequest searchRequest) {
    // We're doing no validation, just flatout acting as a conduit
    return sampleService.search(searchRequest.getSearchField());
  }
}