spring - 未对 @Transactional 注解执行回滚
问题描述
我正在尝试创建一个用于转移资金的 API,即取款和存款。我使用@Transactional Annotation 执行了事务。但是有一些标准,即如果银行帐号不存在,应该通过运行时异常。我将附上代码。现在,当调用 transferBalanceMethod 时,如果存款人银行账户不存在,那么提取的金额也应该回滚。但这并没有发生。意味着当资金从 A 账户转移到 B 账户时,1000 卢比,如果 B 的存款出现异常,那么 A 账户中的提款也应该被提取。
Model Class//This is the Model Class
//All Imports
@Entity
public class BankAccount {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "id")
private Integer id;
@Column(name = "bankAccountNumber", nullable = false,unique = true)
@NotNull
@Size(min = 5, message = "Bank account number should be greater than 5 characters")
private String bankAccountNumber;
@NotNull
@Column(name = "balance", nullable = false)
@Min(1000)
private Long balance;
//Getter Setter and Constructor
**Controller File**//This is the Controller Class
//All imports and other stuff such as @RestController, @Autowired
@GetMapping("/bankaccount/transfer")
public void transferBalance(@RequestParam("bankAccountNo1") String bankAccountNo1, @RequestParam("bankAccountNo2") String bankAccountNo2,
@RequestParam("balance") Long balance) throws RuntimeException
{
bankService.transferBalance(bankAccountNo1,bankAccountNo2, balance);
}
}
**Service File:-**//This is Service Layer
//All imports
@Service
public class BankService {
@Autowired
private BankRepository bankRepository;
@Autowired
private ModelMapper modelMapper;
public List<BankAccountDTO> getAllBankAccount() {
List<BankAccountDTO> bankAccountDTO = new ArrayList<BankAccountDTO>();
List<BankAccount> bankAccount = bankRepository.findAll();
for (BankAccount b : bankAccount) {
bankAccountDTO.add(modelMapper.map(b, BankAccountDTO.class));
}
return bankAccountDTO;
}
public ResponseEntity<?> getIndividualBankAccount(String bankAccountNumber) {
BankAccount bankAccount = bankRepository.findByBankAccountNumber(bankAccountNumber);
if (bankAccount == null) {
return new ResponseEntity<>("Account not found", HttpStatus.BAD_REQUEST);
} else {
return new ResponseEntity<>(
modelMapper.map(bankRepository.findByBankAccountNumber(bankAccountNumber), BankAccountDTO.class),
HttpStatus.OK);
}
}
public Object addBankAccount(BankAccountDTO bankAccountDTO) {
return bankRepository.save(modelMapper.map(bankAccountDTO, BankAccount.class));
}
@Transactional(propagation = Propagation.REQUIRED)
public void depositBalance(String bankAccountNumber, Long balance) throws RuntimeException {
BankAccount bankAccNo = bankRepository.findByBankAccountNumber(bankAccountNumber);
if (bankAccNo == null) {
throw new RuntimeException("Bank Accout Number is not found : " + bankAccountNumber);
} else {
if (balance <= 0) {
throw new RuntimeException("Please deposit appropriate balance");
} else {
Long amount = bankAccNo.getBalance() + balance;
bankAccNo.setBalance(amount);
bankRepository.save(bankAccNo);
}
}
}
@Transactional(propagation = Propagation.REQUIRED)
public void withdrawBalance(String bankAccountNumber, Long balance) throws RuntimeException {
BankAccount bankAccNo = bankRepository.findByBankAccountNumber(bankAccountNumber);
if (bankAccNo == null) {
throw new RuntimeException("Bank Account not found :" + bankAccountNumber);
} else {
if (balance <= 0) {
throw new RuntimeException("Please withdraw appropriate balance");
} else {
Long amount = bankAccNo.getBalance() - balance;
if (amount < 1000) {
throw new RuntimeException("Sorry Cannot withdraw.Your minimum balance should be thousand rupees!");
} else {
bankAccNo.setBalance(amount);
bankRepository.save(bankAccNo);
}
}
}
}
@Transactional(propagation = Propagation.REQUIRES_NEW, rollbackFor = RuntimeException.class)
public void transferBalance(String bankAccountNo1, String bankAccountNo2, Long balance) throws RuntimeException {
try {
withdrawBalance(bankAccountNo1, balance);
depositBalance(bankAccountNo2, balance);
} catch (RuntimeException e) {
throw e;
}
}
}
解决方案
只有运行时异常才会在 spring 事务注释中触发回滚操作,如果您使用自定义注释,则需要确保您从 RuntimeException 扩展,或者向事务添加特定的回滚子句,以便在该特定的事务中回滚例外。
也许这个答案对你有用: Spring transaction: rollback on Exception or Throwable
也可以在这里查看spring的官方事务文档: https ://docs.spring.io/spring/docs/4.2.x/spring-framework-reference/html/transaction.html
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