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@Service
public class PaymentStateMachineService {
@Autowired
private PaymentOrderMapper paymentOrderMapper;
@Autowired
private PaymentStateTransitionMapper stateTransitionMapper;
private final Map<PaymentStatus, Set<PaymentStatus>> stateTransitions = new HashMap<>();
@PostConstruct
public void initStateMachine() {
stateTransitions.put(PaymentStatus.PENDING,
Set.of(PaymentStatus.PROCESSING, PaymentStatus.CANCELLED));
stateTransitions.put(PaymentStatus.PROCESSING,
Set.of(PaymentStatus.SUCCESS, PaymentStatus.FAILED, PaymentStatus.CANCELLED));
stateTransitions.put(PaymentStatus.SUCCESS,
Set.of(PaymentStatus.REFUNDED));
stateTransitions.put(PaymentStatus.FAILED,
Set.of(PaymentStatus.PROCESSING, PaymentStatus.CANCELLED));
stateTransitions.put(PaymentStatus.CANCELLED,
Set.of(PaymentStatus.PROCESSING));
stateTransitions.put(PaymentStatus.REFUNDED,
Set.of());
}
public boolean canTransition(PaymentStatus fromStatus, PaymentStatus toStatus) {
try {
Set<PaymentStatus> allowedTransitions = stateTransitions.get(fromStatus);
if (allowedTransitions == null) {
return false;
}
return allowedTransitions.contains(toStatus);
} catch (Exception e) {
log.error("检查状态转换失败", e);
return false;
}
}
@Transactional
public boolean transitionState(String orderId, PaymentStatus fromStatus, PaymentStatus toStatus,
String reason) {
try {
if (!canTransition(fromStatus, toStatus)) {
log.warn("非法状态转换: {} -> {}, 订单: {}", fromStatus, toStatus, orderId);
return false;
}
int updateCount = paymentOrderMapper.updateStatus(orderId, fromStatus, toStatus);
if (updateCount == 0) {
log.warn("状态转换失败，订单不存在或状态不匹配: {}", orderId);
return false;
}
PaymentStateTransition transition = new PaymentStateTransition();
transition.setOrderId(orderId);
transition.setFromStatus(fromStatus);
transition.setToStatus(toStatus);
transition.setReason(reason);
transition.setCreateTime(new Date());
stateTransitionMapper.insert(transition);
log.info("状态转换成功: {} -> {}, 订单: {}", fromStatus, toStatus, orderId);
return true;
} catch (Exception e) {
log.error("状态转换失败", e);
throw new PaymentException("状态转换失败", e);
}
}
public PaymentStatus getCurrentStatus(String orderId) {
try {
PaymentOrder order = paymentOrderMapper.selectByOrderId(orderId);
if (order == null) {
return null;
}
return order.getStatus();
} catch (Exception e) {
log.error("获取订单状态失败", e);
throw new PaymentException("获取订单状态失败", e);
}
}
public List<PaymentStateTransition> getStateTransitionHistory(String orderId) {
try {
return stateTransitionMapper.selectByOrderId(orderId);
} catch (Exception e) {
log.error("获取状态转换历史失败", e);
throw new PaymentException("获取状态转换历史失败", e);
}
}
public boolean canPay(String orderId) {
try {
PaymentStatus currentStatus = getCurrentStatus(orderId);
if (currentStatus == null) {
return false;
}
return canTransition(currentStatus, PaymentStatus.PROCESSING);
} catch (Exception e) {
log.error("检查订单是否可以支付失败", e);
return false;
}
}
public boolean canCancel(String orderId) {
try {
PaymentStatus currentStatus = getCurrentStatus(orderId);
if (currentStatus == null) {
return false;
}
return canTransition(currentStatus, PaymentStatus.CANCELLED);
} catch (Exception e) {
log.error("检查订单是否可以取消失败", e);
return false;
}
}
public boolean canRefund(String orderId) {
try {
PaymentStatus currentStatus = getCurrentStatus(orderId);
if (currentStatus == null) {
return false;
}
return canTransition(currentStatus, PaymentStatus.REFUNDED);
} catch (Exception e) {
log.error("检查订单是否可以退款失败", e);
return false;
}
}
}
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