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https://github.com/apache/incubator-seata

:fire: Seata is an easy-to-use, high-performance, open source distributed transaction solution.
https://github.com/apache/incubator-seata

at consistency distributed-transaction microservice saga tcc xa

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:fire: Seata is an easy-to-use, high-performance, open source distributed transaction solution.

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# Seata: Simple Extensible Autonomous Transaction Architecture

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## What is Seata?

A **distributed transaction solution** with high performance and ease of use for **microservices** architecture.
### Distributed Transaction Problem in Microservices

Let's imagine a traditional monolithic application. Its business is built up with 3 modules. They use a single local data source.

Naturally, data consistency will be guaranteed by the local transaction.

![Monolithic App](https://img.alicdn.com/imgextra/i3/O1CN01FTtjyG1H4vvVh1sNY_!!6000000000705-0-tps-1106-678.jpg)

Things have changed in a microservices architecture. The 3 modules mentioned above are designed to be 3 services on top of 3 different data sources ([Pattern: Database per service](http://microservices.io/patterns/data/database-per-service.html)). Data consistency within every single service is naturally guaranteed by the local transaction.

**But how about the whole business logic scope?**

![Microservices Problem](https://img.alicdn.com/imgextra/i1/O1CN01DXkc3o1te9mnJcHOr_!!6000000005926-0-tps-1268-804.jpg)

### How Seata do?

Seata is just a solution to the problem mentioned above.

![Seata solution](https://img.alicdn.com/imgextra/i1/O1CN01FheliH1k5VHIRob3p_!!6000000004632-0-tps-1534-908.jpg)

Firstly, how to define a **Distributed Transaction**?

We say, a **Distributed Transaction** is a **Global Transaction** which is made up with a batch of **Branch Transaction**, and normally **Branch Transaction** is just **Local Transaction**.

![Global & Branch](https://cdn.nlark.com/lark/0/2018/png/18862/1545015454979-a18e16f6-ed41-44f1-9c7a-bd82c4d5ff99.png)

There are three roles in Seata Framework:

- **Transaction Coordinator(TC):** Maintain status of global and branch transactions, drive the global commit or rollback.
- **Transaction Manager(TM):** Define the scope of global transaction: begin a global transaction, commit or rollback a global transaction.
- **Resource Manager(RM):** Manage resources that branch transactions working on, talk to TC for registering branch transactions and reporting status of branch transactions, and drive the branch transaction commit or rollback.

![Model](https://cdn.nlark.com/lark/0/2018/png/18862/1545013915286-4a90f0df-5fda-41e1-91e0-2aa3d331c035.png)

A typical lifecycle of Seata managed distributed transaction:

1. TM asks TC to begin a new global transaction. TC generates an XID representing the global transaction.
2. XID is propagated through microservices' invoke chain.
3. RM registers local transaction as a branch of the corresponding global transaction of XID to TC.
4. TM asks TC for committing or rollbacking the corresponding global transaction of XID.
5. TC drives all branch transactions under the corresponding global transaction of XID to finish branch committing or rollbacking.

![Typical Process](https://cdn.nlark.com/lark/0/2018/png/18862/1545296917881-26fabeb9-71fa-4f3e-8a7a-fc317d3389f4.png)

For more details about principle and design, please go to [Seata wiki page](https://github.com/apache/incubator-seata/wiki).

### History

##### Alibaba

- **TXC**: Taobao Transaction Constructor. Alibaba middleware team started this project since 2014 to meet the distributed transaction problems caused by application architecture change from monolithic to microservices.
- **GTS**: Global Transaction Service. TXC as an Aliyun middleware product with new name GTS was published since 2016.
- **Fescar**: we started the open source project Fescar based on TXC/GTS since 2019 to work closely with the community in the future.

##### Ant Financial

- **XTS**: Extended Transaction Service. Ant Financial middleware team developed the distributed transaction middleware since 2007, which is widely used in Ant Financial and solves the problems of data consistency across databases and services.

- **DTX**: Distributed Transaction Extended. Since 2013, XTS has been published on the Ant Financial Cloud, with the name of DTX .

##### Seata Community

- **Seata** :Simple Extensible Autonomous Transaction Architecture. Ant Financial joins Fescar, which make it to be a more neutral and open community for distributed transaction, and Fescar be renamed to Seata.

## Maven dependency

Depending on the scenario, choose one of the two dependencies: `org.apache.seata:seata-all` or `org.apache.seata:seata-spring-boot-starter`.
```xml

2.2.0


org.apache.seata
seata-all
${seata.version}


org.apache.seata
seata-spring-boot-starter
${seata.version}

```

## Quick Start

[Quick Start](https://seata.apache.org/zh-cn/docs/ops/deploy-guide-beginner)

## Documentation

You can view the full documentation from Seata Official Website: [Seata Website page](https://seata.apache.org/zh-cn/docs/overview/what-is-seata).

## Reporting bugs

Please follow the [template](./.github/ISSUE_TEMPLATE/BUG_REPORT.md) for reporting any issues.

## Security

Please do not use our public issue tracker but refer to our [security policy](./SECURITY.md)

## Contributing

Contributors are welcomed to join the Seata project. Please check [CONTRIBUTING](./CONTRIBUTING.md) and [CONTRIBUTING-CN](./CONTRIBUTING_CN.md) about how to contribute to this project.

## Contact

* Mailing list:
* [email protected] , for dev/user discussion. [subscribe](mailto:[email protected]), [unsubscribe](mailto:[email protected]), [archive](https://lists.apache.org/[email protected])
* Online chat:

| Dingtalk group | Wechat official account | QQ group | Wechat assistant |
|:---------------------------------------------------------------------------------------------------------------------------:|:----------------------------------------------------------------------------------------------------------------------------:|:---------------------------------------------------------------------------------------------------------------------:|:-------------------------------------------------------------------------------------------------------------------:|
| | | | |

## Seata ecosystem

* [Seata Website](https://github.com/apache/incubator-seata.github.io) - Seata official website
* [Seata GoLang](https://github.com/apache/incubator-seata-go) - Seata GoLang client and server
* [Seata Samples](https://github.com/apache/incubator-seata-samples) - Samples for Seata
* [Seata GoLang Samples](https://github.com/apache/incubator-seata-go-samples) - Samples for Seata GoLang
* [Seata K8s](https://github.com/apache/incubator-seata-k8s) - Seata integration with k8s
* [Seata CLI](https://github.com/apache/incubator-seata-ctl) - CLI tool for Seata

## Contributors

This project exists thanks to all the people who contribute. [[Contributors](https://github.com/apache/incubator-seata/graphs/contributors)].

## License

Seata is under the Apache 2.0 license. See the [LICENSE](https://github.com/apache/incubator-seata/blob/master/LICENSE) file for details.

## Who is using

These are only part of the companies using Seata, for reference only. If you are using Seata, please [add your company
here](https://github.com/apache/incubator-seata/issues/1246) to tell us your scenario to make Seata better.


Alibaba Group
蚂蚁金服
阿里云
中航信
联通(浙江)
中国铁塔
滴滴
中国邮政
58集团
南航
TCL
韵达快递
科大讯飞
奇虎360
收钱吧
太极计算机
美的集团
中国网安
政采云
浙江公安厅
特步
中通快递
欧莱雅百库
浙江烟草
波司登
凯京科技
点购集团
求是创新健康
科蓝
康美药业
雁联
学两手
衣二三
北京薪福社
叩丁狼教育
悦途出行
国信易企签
睿颐软件
全房通
有利网
赛维
安心保险
科达科技
会分期
会找房
会通教育
享住智慧
兰亮网络
桔子数科
蓝天教育
烟台欣和
阿康健康
财新传媒
新脉远
乾动新能源
路客精品民宿
深圳好尔美
浙大睿医
深圳市云羿贸易科技有限公司
居然之家
深圳来电科技有限公司
臻善科技
中国支付通
众网小贷
谐云科技
浙江甄品
深圳海豚网
汇通天下
九机网
有好东西
南京智慧盾
数跑科技
拉粉粉
汇通达
易宝支付
维恩贝特
八库
大诚若谷
杭州华网信息
深圳易佰
易点生活
成都数智索
北京超图
江西群享科技有限公司
宋城独木桥网络有限公司
唯小宝(江苏)网络技术有限公司
杭州喜团科技
海典软件
中元健康科技有限公司
宿迁民丰农商银行
上海海智在线
丞家(上海)公寓管理
安徽国科新材科
商银信支付
钛师傅云
广州力生信息
杭州启舰科技有限公司
微链
上海美浮特
江西群享科技有限公司
杭州中威慧云医疗科技有限公司
易族智汇(北京)
佛山宅无限
F5未来商店
重庆雷高科技有限公司
甄品信息科技
行云全球汇跨境电商(杭州分部)
世纪加华
快陪练
西南石油大学
厦门服云信息科技有限公司
领课网络
美通社
睿维科技有限公司
郑州信源信息技术
荣怀集团
浙江群集大数据科技有限公司
北京易点租有限公司
浙江蕙康科技有限公司
致远创想
深圳智荟物联技术有限公司
源讯中国
武汉江寓生活服务有限公司
大账房
上海阳光喔教育科技有限公司
北京新学道教育科技有限公司
北京悦途出行网络科技公司
上海意贝斯特信息技术有限公司
御家汇
广州社众软件
浩鲸科技
华宇信息
中国云尚科技
卫宁健康
聚合联动
熙菱信息
鲸算科技
杭州沃朴物联科技有限公司
深圳市臻络科技有限公司
白云电气
百果园
海尔
六倍体科技
泉州银行
小滴课堂
医百顺
正泰中自控制
中国电子科技网络
卓源软件
重庆直通物流有限公司
海澜集团
南宁微服信息技术有限公司
日事清
小鹏汽车
平安人寿
光大银行