juplo.de Git - demos/kafka/demos-kafka-payment-system-transfer/blob - src/main/java/de/juplo/kafka/payment/transfer/adapter/TransferController.java

   1 package de.juplo.kafka.payment.transfer.adapter;
   2
   3
   4 import de.juplo.kafka.payment.transfer.domain.Transfer;
   5 import de.juplo.kafka.payment.transfer.ports.GetTransferUseCase;
   6 import de.juplo.kafka.payment.transfer.ports.ReceiveTransferUseCase;
   7 import lombok.RequiredArgsConstructor;
   8 import lombok.extern.slf4j.Slf4j;
   9 import org.springframework.http.HttpStatus;
  10 import org.springframework.http.MediaType;
  11 import org.springframework.http.ResponseEntity;
  12 import org.springframework.validation.FieldError;
  13 import org.springframework.web.bind.MethodArgumentNotValidException;
  14 import org.springframework.web.bind.annotation.*;
  15 import org.springframework.web.context.request.async.DeferredResult;
  16
  17 import javax.servlet.http.HttpServletRequest;
  18 import javax.validation.Valid;
  19 import java.net.URI;
  20 import java.util.Date;
  21 import java.util.HashMap;
  22 import java.util.Map;
  23
  24
  25 @RestController
  26 @RequiredArgsConstructor
  27 @Slf4j
  28  public class TransferController
  29 {
  30   public final static String PATH = "/transfers";
  31
  32   private final ReceiveTransferUseCase receiveTransferUseCase;
  33   private final GetTransferUseCase getTransferUseCase;
  34
  35
  36   @PostMapping(
  37       path = PATH,
  38       consumes = MediaType.APPLICATION_JSON_VALUE,
  39       produces = MediaType.APPLICATION_JSON_VALUE)
  40   public DeferredResult<ResponseEntity<?>> transfer(
  41       HttpServletRequest request,
  42       @Valid @RequestBody TransferDTO transferDTO)
  43   {
  44     Transfer transfer =
  45         Transfer
  46             .builder()
  47             .id(transferDTO.getId())
  48             .payer(transferDTO.getPayer())
  49             .payee(transferDTO.getPayee())
  50             .amount(transferDTO.getAmount())
  51             .build();
  52
  53     DeferredResult<ResponseEntity<?>> result = new DeferredResult<>();
  54
  55     receiveTransferUseCase
  56         .receive(transfer)
  57         .thenApply(
  58             $ ->
  59                 ResponseEntity
  60                     .created(URI.create(PATH + "/" + transferDTO.getId()))
  61                     .build())
  62         .thenAccept(
  63             responseEntity -> result.setResult(responseEntity))
  64         .exceptionally(
  65             e ->
  66             {
  67               result.setErrorResult(e);
  68               return null;
  69             });
  70
  71     return result;
  72   }
  73
  74   @GetMapping(
  75       path = PATH + "/{id}",
  76       produces = MediaType.APPLICATION_JSON_VALUE)
  77   public ResponseEntity<TransferDTO> get(@PathVariable Long id)
  78   {
  79     return
  80         getTransferUseCase
  81             .get(id)
  82             .map(transfer -> ResponseEntity.ok(TransferDTO.of(transfer)))
  83             .orElse(ResponseEntity.notFound().build());
  84   }
  85
  86   @ResponseStatus(HttpStatus.BAD_REQUEST)
  87   @ExceptionHandler(MethodArgumentNotValidException.class)
  88   public Map<String, Object> handleValidationExceptions(
  89       HttpServletRequest request,
  90       MethodArgumentNotValidException e)
  91   {
  92     Map<String, Object> errorAttributes = new HashMap<>();
  93     errorAttributes.put("status", HttpStatus.BAD_REQUEST.value());
  94     errorAttributes.put("error", HttpStatus.BAD_REQUEST.getReasonPhrase());
  95     errorAttributes.put("path", request.getRequestURI());
  96     errorAttributes.put("method", request.getMethod());
  97     errorAttributes.put("timestamp", new Date());
  98     Map<String, String> errors = new HashMap<>();
  99     e.getBindingResult().getAllErrors().forEach((error) -> {
 100       String fieldName = ((FieldError) error).getField();
 101       String errorMessage = error.getDefaultMessage();
 102       errors.put(fieldName, errorMessage);
 103     });
 104     errorAttributes.put("errors", errors);
 105     errorAttributes.put("message", "Validation failed: Invalid message format, error count: " + errors.size());
 106     return errorAttributes;
 107   }
 108 }