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A Lightweight Distributed Transaction Manager

Who's using DTM

Ivydad

Eglass

Jiou

GoldenData

What is DTM

DTM is the first distributed transaction management framework in golang. Unlike other frameworks, DTM provides extremely easy access to HTTP and gRPC, supports multiple language bindings, and handles tricky problems of unordered sub-transactions at the framework level.

Features

Extremely easy to adopt
- Support HTTP and gRPC, provide easy-to-use programing interfaces, lower substantially the barrier of getting started with distributed transactions, newcomers can adopt quickly
Easy to use
- Relieving developers from worrying about suspension, null compensation, idempotent transaction, and other tricky problems, the framework layer handles them all
Language-agnostic
- Suitable for companies with multiple-language stacks. Easy to write bindings for go, python, php, nodejs, ruby and other languages.
Easy to deploy, easy to extend
- DTM depends only on mysql, easy to deploy, cluster, and scale horizontally
Support for multiple distributed transaction protocol
- TCC, SAGA, XA, Transactional messages

DTM vs Other

There is no mature open-source distributed transaction framework for non-Java languages. Mature open-source distributed transaction frameworks for Java language include Ali's Seata, Huawei's ServiceComb-Pack, Jingdong's shardingsphere, himly, tcc-transaction, ByteTCC and so on, of which Seata is most widely used.

The following is a comparison of the main features of dtm and Seata.

Features	DTM	Seata	Remarks
Supported languages	Golang, python, php and others	Java	dtm allows easy access from a new language
Exception handling	Sub-transaction barrier	manual	dtm solves idempotent transaction, hanging, null compensation
TCC	✓	✓
XA	✓	✓
AT	✗	✓	AT is similar to XA with better performance but with dirty rollback
SAGA	Simple mode	complicated state-machine mode	dtm's state-machine mode is being planned
Transactional Messaging	✓	✗	dtm provides Transactional Messaging similar to RocketMQ
Communication protocols	HTTP, gRPC	Dubbo, no HTTP
star count			dtm 0.1 is released from 20210604 and under fast development

From the features comparison above, if your language stack includes languages other than Java, then dtm is the one for you. If your language stack is Java, you can also choose to access dtm and use sub-transaction barrier technology to simplify your business development.

Quick start

Installation

git clone https://github.com/yedf/dtm

Configure Mysql

cp conf.sample.yml conf.yml # Modify conf.yml

Start The Example

go run app/main.go

Code

Use

  // business micro-service address
  const qsBusi = "http://localhost:8081/api/busi_saga"
  // The address where DtmServer serves DTM, which is a url
  DtmServer := "http://localhost:8080/api/dtmsvr"
  req := &gin.H{"amount": 30} // micro-service payload
	// DtmServer is the address of DTM micro-service
	saga := dtmcli.NewSaga(DtmServer, dtmcli.MustGenGid(DtmServer)).
		// add a TransOut subtraction，forward operation with url: qsBusi+"/TransOut", reverse compensation operation with url: qsBusi+"/TransOutCompensate"
		Add(qsBusi+"/TransOut", qsBusi+"/TransOutCompensate", req).
		// add a TransIn subtraction, forward operation with url: qsBusi+"/TransIn", reverse compensation operation with url: qsBusi+"/TransInCompensate"
		Add(qsBusi+"/TransIn", qsBusi+"/TransInCompensate", req)
	// submit the created saga transaction，dtm ensures all subtractions either complete or get revoked
	err := saga.Submit()