8000 求解答关于DTM架构的问题 · Issue #551 · dtm-labs/dtm · GitHub
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求解答关于DTM架构的问题 #551

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mooneal opened this issue Mar 28, 2025 · 1 comment
Open

求解答关于DTM架构的问题 #551

mooneal opened this issue Mar 28, 2025 · 1 comment

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@mooneal
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mooneal commented Mar 28, 2025

“AP-应用程序：AP是一个应用服务，负责全局事务的编排，他会注册全局事务，注册子事务，调用RM接口。例如在前面的这个SAGA事务中，发起步骤1的是AP，它编排了一个包含TransOut、TransIn的全局事务，然后提交给TM”

这个架构里是说，如果我要用的话，我必须有一个全局事务的编排服务吗？ 以一个典型的分布式事务的例子：
创建订单：需要在订单表中创建订单，唯一键为订单ID
扣减库存：需要给用户下单的商品扣减库存
扣减优惠券：用户在下单前，选择了可使用的优惠券，提交订单时，则扣减这部分优惠券
创建支付单：提交订单后，需要创建支付单，最后告诉用户跳转到支付页

我理解通常来说对外的接口都是订单服务提供的，订单服务能当ap吗？
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