git.gumartinm.name Git - JavaForFun/blob

   1 package de.spring.webservices.rest.controller;
   2
   3 import java.util.Map;
   4 import java.util.concurrent.CompletableFuture;
   5
   6 import static de.spring.webservices.rest.controller.adapters.CompletableFutureAdapter.deferredAdapter;
   7
   8 import javax.inject.Inject;
   9
  10 import org.slf4j.Logger;
  11 import org.slf4j.LoggerFactory;
  12 import org.springframework.data.domain.Page;
  13 import org.springframework.data.domain.PageRequest;
  14 import org.springframework.http.HttpHeaders;
  15 import org.springframework.http.HttpStatus;
  16 import org.springframework.http.MediaType;
  17 import org.springframework.http.ResponseEntity;
  18 import org.springframework.web.bind.annotation.PathVariable;
  19 import org.springframework.web.bind.annotation.RequestBody;
  20 import org.springframework.web.bind.annotation.RequestHeader;
  21 import org.springframework.web.bind.annotation.RequestMapping;
  22 import org.springframework.web.bind.annotation.RequestMethod;
  23 import org.springframework.web.bind.annotation.RequestParam;
  24 import org.springframework.web.bind.annotation.ResponseStatus;
  25 import org.springframework.web.bind.annotation.RestController;
  26 import org.springframework.web.context.request.async.DeferredResult;
  27
  28 import de.spring.webservices.domain.Car;
  29 import de.spring.webservices.rest.business.service.CompletableFutureBusinessLogic;
  30
  31 @RestController
  32 @RequestMapping("/api/deferrable/cars/")
  33 public class DeferrableCarController {
  34         private static final Logger LOGGER = LoggerFactory.getLogger(DeferrableCarController.class);
  35         private static final int PAGE = 2;
  36         private static final int PAGE_SIZE = 10;
  37
  38         private final CompletableFutureBusinessLogic completableFutureBusinessLogic;
  39
  40         @Inject
  41     public DeferrableCarController(CompletableFutureBusinessLogic completableFutureBusinessLogic) {
  42                 this.completableFutureBusinessLogic = completableFutureBusinessLogic;
  43         }
  44
  45         @RequestMapping(produces = { MediaType.APPLICATION_JSON_UTF8_VALUE }, method = RequestMethod.GET)
  46     @ResponseStatus(HttpStatus.OK)
  47     public DeferredResult<Page<Car>> cars() {
  48
  49                 return deferredAdapter(completableFutureBusinessLogic.findAll(new PageRequest(PAGE, PAGE_SIZE)));
  50     }
  51
  52     @RequestMapping(value = "{id}", produces = MediaType.APPLICATION_JSON_UTF8_VALUE, method = RequestMethod.GET)
  53     @ResponseStatus(HttpStatus.OK)
  54     public DeferredResult<Car> car(@RequestHeader(value = "MY_HEADER", required = false) String specialHeader,
  55                         @PathVariable("id") long id,
  56                         @RequestParam Map<String, String> params,
  57                         @RequestParam(value = "wheel", required = false) String[] wheelParams) {
  58
  59         if (specialHeader != null) {
  60                 LOGGER.info("SPECIAL HEADER: " + specialHeader);
  61         }
  62
  63         if (params.get("mirror") != null) {
  64                 LOGGER.info("MIRROR: " + params.get("mirror"));
  65         }
  66
  67         if (params.get("window") != null) {
  68                 LOGGER.info("WINDOW: " + params.get("window"));
  69         }
  70
  71         if (wheelParams != null) {
  72                 for(String wheel : wheelParams) {
  73                         LOGGER.info(wheel);
  74                 }
  75         }
  76
  77                 return deferredAdapter(completableFutureBusinessLogic.findById(id));
  78
  79     }
  80
  81     @RequestMapping(consumes = MediaType.APPLICATION_JSON_UTF8_VALUE,
  82                 produces = MediaType.APPLICATION_JSON_UTF8_VALUE, method = RequestMethod.POST)
  83         @ResponseStatus(HttpStatus.CREATED)
  84     public DeferredResult<ResponseEntity<Car>> create(@RequestBody Car car) {
  85
  86         return deferredAdapter(createAsync(car));
  87     }
  88
  89
  90     private CompletableFuture<ResponseEntity<Car>> createAsync(Car car) {
  91
  92         return completableFutureBusinessLogic
  93                         .create(car)
  94                         .thenComposeAsync(newCar ->
  95                                 CompletableFuture.supplyAsync(() -> createResponseCar(newCar))
  96
  97                         );
  98     }
  99
 100     private ResponseEntity<Car> createResponseCar(Car car) {
 101                 HttpHeaders headers = new HttpHeaders();
 102             headers.add(HttpHeaders.LOCATION, "/api/cars/" + car.getId());
 103             return new ResponseEntity<>(car, headers, HttpStatus.CREATED);
 104     }
 105 }