its my first time crating api in spring boot, i'm trying to create transaction api. when i'm running the application i'm getting this error Description: Parameter 0 of constructor in TransactionService.transactionService.modal.TransactionRequest required a bean of type 'int' that could not be found. Action: Consider defining a bean of type 'int' in your configuration.

Modal package: TransactionEntity

@Getter
@Setter
@Builder
@Entity
public class TransactionEntity {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private  int transactionId;
    @NotNull
    @Column(unique = true)
    private UUID externalId;
    @NotNull
    private int userId;
    @NotNull
    private int merchantId;
    @NotNull
    private int clientReferenceId;
    @NotNull
    private double amount;
    @Enumerated(EnumType.STRING)
    @NotNull
    private TransactionStatus status;
    @NotNull
    private String createdBy;
     private String updatedBy;
     @NotNull
    private LocalDateTime createdAt;
     @NotNull
    private LocalDateTime updatedAt;
}

TransactionRequest

@Component
@Data
@Builder

public class TransactionRequest {
      private int userId;
      private int merchantId;
      private int clientReferenceId;
      private double amount;
      private String createdBy;

}

TransactionResponse

@Component
@Data
@Builder
public class TransactionResponse {
    private int userId;
    private int merchantId;
    private int clientReferenceId;
    private double amount;
    private LocalDateTime createdAt;
    private TransactionStatus status;
}

TransactionDao

@Component
// Dao class
public class TransactionDao {

    TransactionRepository transactionRepository;
    TransactionEntity transactionEntity;
    public TransactionResponse createTransaction(TransactionRequest transactionRequest){

        LocalDateTime cuurentTime = LocalDateTime.now();
        TransactionEntity.builder().userId(transactionRequest.getUserId())
                .merchantId(transactionRequest.getMerchantId())
                .clientReferenceId(transactionRequest.getClientReferenceId())
                .amount(transactionRequest.getAmount())
                .createdBy(transactionRequest.getCreatedBy());
        transactionEntity.setCreatedAt(cuurentTime);
        transactionEntity.setUpdatedAt(cuurentTime);
        transactionEntity.setExternalId(UUID.randomUUID());
        transactionEntity.setStatus(TransactionStatus.CREATED);
        transactionRepository.save(transactionEntity);
        return TransactionResponse.builder().status(transactionEntity.getStatus())
                .createdAt(transactionEntity.getCreatedAt()).build();

    }

}

TransactionService

@Service
public class TransactoinService {
     @Autowired
     public TransactionDao transactionDao;
     public TransactionResponse createTransaction(TransactionRequest transactionRequest){
           return transactionDao.createTransaction(transactionRequest);
     }


}

TransactionController

@RestController
public class TransactionController {
    @Autowired
    TransactoinService transactoinService;
    @PostMapping
    TransactionResponse  createTransaction(@RequestBody TransactionRequest transactionRequest){
        return transactoinService.createTransaction(transactionRequest);
    }
}

CodePudding user response：

You should not create your POJO classes as a Spring Bean. Remove @Component annotation in your TransactionRequest and TransactionResponse POJO classes.

CodePudding user response：

The TransactionRequest is annotated as @Component so spring boot autoscan will try to create a @Bean out that class.

It is also annotated with @Data so at the time of creating the bean Spring boot is trying to inject other beans as arguments into the all args constructor, and it is not finding an "int" bean to inject into the constructor.

I am guessing that the transaction response should not be a @Component or at least not a Singleton bean.