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刘伟 / tcc-transaction

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Apache-2.0

Try: 尝试执行业务

完成所有业务检查(一致性)

预留必须业务资源(准隔离性)

Confirm: 确认执行业务

真正执行业务

不作任何业务检查

只使用Try阶段预留的业务资源

Confirm操作满足幂等性

Cancel: 取消执行业务

释放Try阶段预留的业务资源

Cancel操作满足幂等性

示例说明:

tcc-transaction-tutorial-sample示例演示了在使用dubbo作为rpc调用情况下如何使用tcc-transaction(tcc-transaction不和底层使用的rpc框架耦合,也就是使用doubbo,thrift,web service,http等都可)。

本示例演示在下完订单后,使用红包帐户和资金帐户来付款,红包帐户服务和资金帐户服务在不同的系统中。示例中,有两个SOA提供方,一个是CapitalTradeOrderService,代表着资金帐户服务,另一个是RedPacketTradeOrderService,代表着红包帐户服务。

下完订单后,订单状态为DRAFT,在TCC事务中TRY阶段,订单支付服务将订单状态变成PAYING,同时远程调用红包帐户服务和资金帐户服务,将付款方的余额减掉(预留业务资源);如果在TRY阶段,任何一个服务失败,tcc-transaction将自动调用这些服务对应的cancel方法,订单支付服务将订单状态变成PAY_FAILED,同时远程调用红包帐户服务和资金帐户服务,将付款方余额减掉的部分增加回去;如果TRY阶段正常完成,则进入CONFIRM阶段,在CONFIRM阶段(tcc-transaction自动调用),订单支付服务将订单状态变成CONFIRMED,同时远程调用红包帐户服务和资金帐户服务对应的CONFIRM方法,将收款方的余额增加。特别说明下,由于是示例,在CONFIRM和CANCEL方法中没有实现幂等性,如果在真实项目中使用,需要保证CONFIRM和CANCEL方法的幂等性。

在运行sample前,需搭建好db环境,运行dbscripts目录下的create_db.sql建立数据库实例及表;还需修改各种项目中jdbc.properties文件中的jdbc连接信息。

使用指南:https://github.com/changmingxie/tcc-transaction/wiki/%E4%BD%BF%E7%94%A8%E6%8C%87%E5%8D%97 如有问题可以在本项目的github issues中提问。

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