35 lines
1.9 KiB
Markdown
35 lines
1.9 KiB
Markdown
### 轻量级分布式事务管理服务
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跨语言--语言无关，基于http协议
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支持xa、tcc、saga
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## 快速开始
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场景描述：
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假设您实现了一个转账功能，分为两个微服务：转入、转出
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转出：服务地址为 http://example.com/api/busi_saga/transOut?gid=xxx POST 参数为 {"uid": 2, "amount":30}
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转入：服务地址为 http://example.com/api/busi_saga/transIn?gid=xxx POST 参数为 {"uid": 1, "amount":30}
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在saga模式下，有对应的补偿微服务
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转出：服务地址为 http://example.com/api/busi_saga/transOutCompensate?gid=xxx POST 参数为 {"uid": 2, "amount":30}
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转入：服务地址为 http://example.com/api/busi_saga/transInCompensate?gid=xxx POST 参数为 {"uid": 1, "amount":30}
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HTTP协议方式
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curl -d '{"gid":"xxx","trans_type":"saga","steps":[{"action":"http://example.com/api/busi_saga/TransOut","compensate":"http://example.com/api/busi_saga/TransOutCompensate","data":"{\"amount\":30}"},{"action":"http://localhost:8081/api/busi_saga/TransIn","compensate":"http://localhost:8081/api/busi_saga/TransInCompensate","data":"{\"amount\":30}"}]}' 8.140.124.252/api/dtm/commit
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此请求向dtm提交了一个saga事务，dtm会按照saga模式，请求transIn/transOut，并且在出错情况下，保证抵用相关的补偿api
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go客户端方式
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// 事务参与者的服务地址
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const startBusiPort = 8084
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const startBusiApi = "/api/busi_start"
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var startBusi = fmt.Sprintf("http://localhost:%d%s", startBusiPort, startBusiApi)
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err := dtm.SagaNew(DtmServer, gid).Add(startBusi+"/TransOut", startBusi+"/TransOutCompensate", &gin.H{
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"amount": 30,
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"uid": 2,
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}).Add(startBusi+"/TransIn", startBusi+"/TransInCompensate", &gin.H{
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"amount": 30,
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"uid": 1
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}).Commit()
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本地启动方式
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需要安装docker，和docker-compose
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curl localhost:8080/api/initMysql
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go run examples/app/main saga
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其他
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