85 lines
3.1 KiB
Java
85 lines
3.1 KiB
Java
package com.erp.example.seata;
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import io.seata.spring.annotation.GlobalTransactional;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Service;
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/**
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* 分布式事务示例 - 创建订单业务流程
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*
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* 事务流程：
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* 1. 创建订单(Order) - 订单状态=PENDING
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* 2. 扣减库存(Inventory) - 冻结库存
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* 3. 扣减账户余额(Finance) - 冻结资金
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* 4. 更新订单状态 - 订单状态=CREATED
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*
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* 如果任何步骤失败，Seata会自动回滚所有已执行的步骤
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*/
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@Service
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public class GlobalTransactionalExample {
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private static final Logger log = LoggerFactory.getLogger(GlobalTransactionalExample.class);
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@Autowired
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private OrderService orderService;
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@Autowired
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private InventoryService inventoryService;
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@Autowired
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private FinanceService financeService;
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/**
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* 创建订单并执行分布式事务
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*
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* @param customerId 客户ID
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* @param productId 商品ID
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* @param quantity 购买数量
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* @return 订单编号
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*/
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@GlobalTransactional(name = "create-order-transaction", timeoutMills = 30000, rollbackFor = Exception.class)
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public String createOrder(Long customerId, Long productId, Integer quantity) {
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log.info("========== 开始分布式事务 ==========");
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log.info("客户ID: {}, 商品ID: {}, 数量: {}", customerId, productId, quantity);
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// 1. 创建订单
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String orderNo = orderService.createOrder(customerId, productId, quantity);
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log.info("订单已创建: {}", orderNo);
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// 2. 扣减库存（AT模式自动补偿）
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inventoryService.reserveStock(productId, quantity, orderNo);
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log.info("库存已冻结: 商品{} 数量{}", productId, quantity);
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// 3. 冻结资金（AT模式自动补偿）
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financeService.freezeAmount(customerId, quantity * 100L, orderNo);
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log.info("资金已冻结: 客户{} 金额{}", customerId, quantity * 100L);
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// 4. 更新订单状态
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orderService.updateOrderStatus(orderNo, "CREATED");
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log.info("订单状态已更新: {} -> CREATED", orderNo);
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log.info("========== 分布式事务完成 ==========");
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return orderNo;
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}
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/**
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* 模拟失败场景 - 演示事务回滚
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*/
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@GlobalTransactional(name = "create-order-rollback-demo", timeoutMills = 30000)
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public void createOrderRollbackDemo(Long customerId, Long productId, Integer quantity) {
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log.info("========== 开始分布式事务（会回滚）==========");
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String orderNo = orderService.createOrder(customerId, productId, quantity);
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log.info("订单已创建: {}", orderNo);
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// 这里会抛出异常，触发全局回滚
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inventoryService.reserveStock(productId, quantity, orderNo);
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financeService.freezeAmount(customerId, quantity * 100L, orderNo);
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// 模拟业务异常
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throw new RuntimeException("业务处理异常，触发全局回滚！");
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}
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}
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