diff --git a/.gitignore b/.gitignore
index 07fd594..d2e3296 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
-dtmsvr/dtmsvr.yml
+*/**/*.yml
 *.out
-main
+*/**/main
+main
\ No newline at end of file
diff --git a/app/main.go b/app/main.go
index f4f92bf..95aef70 100644
--- a/app/main.go
+++ b/app/main.go
@@ -4,7 +4,6 @@ import (
 	"os"
 	"time"
 
-	"github.com/yedf/dtm/common"
 	"github.com/yedf/dtm/dtmsvr"
 	"github.com/yedf/dtm/examples"
 )
@@ -12,12 +11,10 @@ import (
 type M = map[string]interface{}
 
 func main() {
-	cmd := common.If(len(os.Args) > 1, os.Args[1], "").(string)
-	dtmsvr.LoadConfig()
-	if cmd == "" { // 所有服务都启动
+	if len(os.Args) == 1 { // 所有服务都启动
 		go dtmsvr.StartSvr()
 		go examples.SagaStartSvr()
-	} else if cmd == "dtmsvr" {
+	} else if len(os.Args) > 1 && os.Args[1] == "dtmsvr" {
 		go dtmsvr.StartSvr()
 	}
 	for {
diff --git a/common/types.go b/common/types.go
new file mode 100644
index 0000000..cdd9539
--- /dev/null
+++ b/common/types.go
@@ -0,0 +1,108 @@
+package common
+
+import (
+	"database/sql"
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/sirupsen/logrus"
+	"gorm.io/driver/mysql"
+	"gorm.io/gorm"
+)
+
+type ModelBase struct {
+	ID         uint
+	CreateTime *time.Time `gorm:"autoCreateTime"`
+	UpdateTime *time.Time `gorm:"autoUpdateTime"`
+}
+
+var dbs = map[string]*MyDb{}
+
+type MyDb struct {
+	*gorm.DB
+}
+
+func (m *MyDb) Must() *MyDb {
+	db := m.InstanceSet("ivy.must", true)
+	return &MyDb{DB: db}
+}
+
+func (m *MyDb) NoMust() *MyDb {
+	db := m.InstanceSet("ivy.must", false)
+	return &MyDb{DB: db}
+}
+
+type tracePlugin struct{}
+
+func (op *tracePlugin) Name() string {
+	return "tracePlugin"
+}
+
+func (op *tracePlugin) Initialize(db *gorm.DB) (err error) {
+	before := func(db *gorm.DB) {
+		db.InstanceSet("ivy.startTime", time.Now())
+	}
+
+	after := func(db *gorm.DB) {
+		_ts, _ := db.InstanceGet("ivy.startTime")
+		sql := db.Dialector.Explain(db.Statement.SQL.String(), db.Statement.Vars...)
+		logrus.Printf("used: %d ms affected: %d sql is: %s", time.Since(_ts.(time.Time)).Milliseconds(), db.RowsAffected, sql)
+		if v, ok := db.InstanceGet("ivy.must"); ok && v.(bool) {
+			if db.Error != nil && db.Error != gorm.ErrRecordNotFound {
+				panic(db.Error)
+			}
+		}
+	}
+
+	beforeName := "cb_before"
+	afterName := "cb_after"
+
+	logrus.Printf("installing db plugin: %s", op.Name())
+	// 开始前
+	_ = db.Callback().Create().Before("gorm:before_create").Register(beforeName, before)
+	_ = db.Callback().Query().Before("gorm:query").Register(beforeName, before)
+	_ = db.Callback().Delete().Before("gorm:before_delete").Register(beforeName, before)
+	_ = db.Callback().Update().Before("gorm:setup_reflect_value").Register(beforeName, before)
+	_ = db.Callback().Row().Before("gorm:row").Register(beforeName, before)
+	_ = db.Callback().Raw().Before("gorm:raw").Register(beforeName, before)
+
+	// 结束后
+	_ = db.Callback().Create().After("gorm:after_create").Register(afterName, after)
+	_ = db.Callback().Query().After("gorm:after_query").Register(afterName, after)
+	_ = db.Callback().Delete().After("gorm:after_delete").Register(afterName, after)
+	_ = db.Callback().Update().After("gorm:after_update").Register(afterName, after)
+	_ = db.Callback().Row().After("gorm:row").Register(afterName, after)
+	_ = db.Callback().Raw().After("gorm:raw").Register(afterName, after)
+	return
+}
+
+func GetDsn(conf map[string]string) string {
+	return fmt.Sprintf("%s:%s@tcp(%s:%s)/%s?charset=utf8mb4&parseTime=true&loc=Local", conf["user"], conf["password"], conf["host"], conf["port"], conf["database"])
+}
+
+func DbGet(conf map[string]string) *MyDb {
+	dsn := GetDsn(conf)
+	if dbs[dsn] == nil {
+		logrus.Printf("connecting %s", strings.Replace(dsn, conf["password"], "****", 1))
+		db1, err := gorm.Open(mysql.Open(dsn), &gorm.Config{
+			SkipDefaultTransaction: true,
+		})
+		PanicIfError(err)
+		db1.Use(&tracePlugin{})
+		dbs[dsn] = &MyDb{DB: db1}
+	}
+	return dbs[dsn]
+}
+
+func DbAlone(conf map[string]string) (*MyDb, *sql.DB) {
+	logrus.Printf("opening alone mysql: %s", GetDsn(conf))
+	mdb, err := sql.Open("mysql", GetDsn(conf))
+	PanicIfError(err)
+	gormDB, err := gorm.Open(mysql.New(mysql.Config{
+		Conn: mdb,
+	}), &gorm.Config{})
+	PanicIfError(err)
+	gormDB.Use(&tracePlugin{})
+	return &MyDb{DB: gormDB}, mdb
+}
diff --git a/common/utils.go b/common/utils.go
index cd74637..03f035d 100644
--- a/common/utils.go
+++ b/common/utils.go
@@ -3,12 +3,19 @@ package common
 import (
 	"bytes"
 	"encoding/json"
+	"fmt"
 	"io/ioutil"
+	"path"
+	"path/filepath"
+	"runtime"
+	"strings"
 	"time"
 
 	"github.com/bwmarrin/snowflake"
 	"github.com/gin-gonic/gin"
+	"github.com/go-resty/resty/v2"
 	"github.com/sirupsen/logrus"
+	"github.com/spf13/viper"
 )
 
 type M = map[string]interface{}
@@ -22,6 +29,16 @@ func OrString(ss ...string) string {
 	return ""
 }
 
+func Panic2Error(perr *error) {
+	if x := recover(); x != nil {
+		if e, ok := x.(error); ok {
+			*perr = e
+		} else {
+			panic(x)
+		}
+	}
+}
+
 func GenGid() string {
 	return gNode.Generate().Base58()
 }
@@ -117,3 +134,69 @@ func WrapHandler(fn func(*gin.Context) (interface{}, error)) gin.HandlerFunc {
 		}
 	}
 }
+
+// 辅助工具与代码
+var RestyClient = resty.New()
+
+func init() {
+	// RestyClient.SetTimeout(3 * time.Second)
+	// RestyClient.SetRetryCount(2)
+	// RestyClient.SetRetryWaitTime(1 * time.Second)
+	RestyClient.OnBeforeRequest(func(c *resty.Client, r *resty.Request) error {
+		logrus.Printf("requesting: %s %s %v", r.Method, r.URL, r.Body)
+		return nil
+	})
+	RestyClient.OnAfterResponse(func(c *resty.Client, resp *resty.Response) error {
+		r := resp.Request
+		logrus.Printf("requested: %s %s %s", r.Method, r.URL, resp.String())
+		return nil
+	})
+}
+
+func CheckRestySuccess(resp *resty.Response, err error) {
+	PanicIfError(err)
+	if !strings.Contains(resp.String(), "SUCCESS") {
+		panic(fmt.Errorf("resty response not success: %s", resp.String()))
+	}
+}
+
+// formatter 自定义formatter
+type formatter struct{}
+
+// Format 进行格式化
+func (f *formatter) Format(entry *logrus.Entry) ([]byte, error) {
+	var b *bytes.Buffer = &bytes.Buffer{}
+	if entry.Buffer != nil {
+		b = entry.Buffer
+	}
+	n := time.Now()
+	ts := fmt.Sprintf("%d-%02d-%02d %02d:%02d:%02d.%03d", n.Year(), n.Month(), n.Day(), n.Hour(), n.Minute(), n.Second(), n.Nanosecond()/1000000)
+	var file string
+	var line int
+	for i := 1; ; i++ {
+		_, file, line, _ = runtime.Caller(i)
+		if strings.Contains(file, "dtm") {
+			break
+		}
+	}
+	b.WriteString(fmt.Sprintf("%s %s:%d %s\n", ts, path.Base(file), line, entry.Message))
+	return b.Bytes(), nil
+}
+
+var configLoaded = map[string]bool{}
+
+// 加载调用者文件相同目录下的配置文件
+func InitApp(config interface{}) {
+	logrus.SetFormatter(&formatter{})
+	_, file, _, _ := runtime.Caller(1)
+	fileName := filepath.Dir(file) + "/conf.yml"
+	if configLoaded[fileName] {
+		return
+	}
+	configLoaded[fileName] = true
+	viper.SetConfigFile(fileName)
+	err := viper.ReadInConfig()
+	PanicIfError(err)
+	err = viper.Unmarshal(config)
+	PanicIfError(err)
+}
diff --git a/dtmsvr/api.go b/dtmsvr/api.go
index 87e8e2c..291282e 100644
--- a/dtmsvr/api.go
+++ b/dtmsvr/api.go
@@ -10,13 +10,14 @@ import (
 func AddRoute(engine *gin.Engine) {
 	engine.POST("/api/dtmsvr/prepare", common.WrapHandler(Prepare))
 	engine.POST("/api/dtmsvr/commit", common.WrapHandler(Commit))
+	engine.POST("/api/dtmsvr/branch", common.WrapHandler(Branch))
 }
 
 func Prepare(c *gin.Context) (interface{}, error) {
-	db := DbGet()
-	m := getSagaModelFromContext(c)
+	db := dbGet()
+	m := getTransFromContext(c)
 	m.Status = "prepared"
-	writeTransLog(m.Gid, "save prepared", m.Status, -1, m.Steps)
+	writeTransLog(m.Gid, "save prepared", m.Status, "", m.Data)
 	db.Must().Clauses(clause.OnConflict{
 		DoNothing: true,
 	}).Create(&m)
@@ -24,20 +25,33 @@ func Prepare(c *gin.Context) (interface{}, error) {
 }
 
 func Commit(c *gin.Context) (interface{}, error) {
-	m := getSagaModelFromContext(c)
-	saveCommitedSagaModel(m)
-	go ProcessCommitedSaga(m.Gid)
+	m := getTransFromContext(c)
+	saveCommitted(m)
+	go ProcessCommitted(m)
 	return M{"message": "SUCCESS"}, nil
 }
 
-func getSagaModelFromContext(c *gin.Context) *SagaModel {
+func Branch(c *gin.Context) (interface{}, error) {
+	branch := TransBranchModel{}
+	err := c.BindJSON(&branch)
+	common.PanicIfError(err)
+	db := dbGet()
+	db.Must().Clauses(clause.OnConflict{
+		DoNothing: true,
+	}).Create(&branch)
+	return M{"message": "SUCCESS"}, nil
+}
+
+func getTransFromContext(c *gin.Context) *TransGlobalModel {
 	data := M{}
 	b, err := c.GetRawData()
 	common.PanicIfError(err)
 	common.MustUnmarshal(b, &data)
-	logrus.Printf("creating saga model in prepare")
-	data["steps"] = common.MustMarshalString(data["steps"])
-	m := SagaModel{}
+	logrus.Printf("creating trans model in prepare")
+	if data["trans_type"].(string) == "saga" {
+		data["data"] = common.MustMarshalString(data["steps"])
+	}
+	m := TransGlobalModel{}
 	common.MustRemarshal(data, &m)
 	return &m
 }
diff --git a/dtmsvr/dtmsvr.yml.sample b/dtmsvr/conf.sample
similarity index 100%
rename from dtmsvr/dtmsvr.yml.sample
rename to dtmsvr/conf.sample
diff --git a/dtmsvr/config.go b/dtmsvr/config.go
index fad69fc..0420f7d 100644
--- a/dtmsvr/config.go
+++ b/dtmsvr/config.go
@@ -1,62 +1,10 @@
 package dtmsvr
 
-import (
-	"bytes"
-	"fmt"
-	"path"
-	"path/filepath"
-	"runtime"
-	"strings"
-	"time"
-
-	"github.com/sirupsen/logrus"
-	"github.com/spf13/viper"
-	"github.com/yedf/dtm/common"
-)
-
-// formatter 自定义formatter
-type formatter struct{}
-
-// Format 进行格式化
-func (f *formatter) Format(entry *logrus.Entry) ([]byte, error) {
-	var b *bytes.Buffer = &bytes.Buffer{}
-	if entry.Buffer != nil {
-		b = entry.Buffer
-	}
-	n := time.Now()
-	ts := fmt.Sprintf("%d-%02d-%02d %02d:%02d:%02d.%03d", n.Year(), n.Month(), n.Day(), n.Hour(), n.Minute(), n.Second(), n.Nanosecond()/1000000)
-	var file string
-	var line int
-	for i := 1; ; i++ {
-		_, file, line, _ = runtime.Caller(i)
-		if strings.Contains(file, "dtm") {
-			break
-		}
-	}
-	b.WriteString(fmt.Sprintf("%s %s:%d %s\n", ts, path.Base(file), line, entry.Message))
-	return b.Bytes(), nil
-}
-
 type dtmsvrConfig struct {
 	PreparedExpire int64 `json:"prepare_expire"` // 单位秒，当prepared的状态超过该时间，才能够转变成canceled，避免cancel了之后，才进入prepared
+	Mysql          map[string]string
 }
 
-var Config = &dtmsvrConfig{
+var config = &dtmsvrConfig{
 	PreparedExpire: 60,
 }
-
-var configLoaded = false
-
-func LoadConfig() {
-	if configLoaded {
-		return
-	}
-	configLoaded = true
-	logrus.SetFormatter(&formatter{})
-	_, file, _, _ := runtime.Caller(0)
-	viper.SetConfigFile(filepath.Dir(file) + "/dtmsvr.yml")
-	err := viper.ReadInConfig()
-	common.PanicIfError(err)
-	err = viper.Unmarshal(&Config)
-	common.PanicIfError(err)
-}
diff --git a/dtmsvr/cron.go b/dtmsvr/cron.go
index d6bf24c..80bb85c 100644
--- a/dtmsvr/cron.go
+++ b/dtmsvr/cron.go
@@ -6,33 +6,32 @@ import (
 	"time"
 
 	"github.com/sirupsen/logrus"
-	"github.com/yedf/dtm"
 	"github.com/yedf/dtm/common"
 )
 
 func CronPreparedOnce(expire time.Duration) {
-	db := DbGet()
-	ss := []SagaModel{}
-	db.Must().Model(&SagaModel{}).Where("update_time < date_sub(now(), interval ? second)", int(expire/time.Second)).Where("status = ?", "prepared").Find(&ss)
-	writeTransLog("", "saga fetch prepared", fmt.Sprint(len(ss)), -1, "")
+	db := dbGet()
+	ss := []TransGlobalModel{}
+	db.Must().Model(&TransGlobalModel{}).Where("update_time < date_sub(now(), interval ? second)", int(expire/time.Second)).Where("status = ?", "prepared").Find(&ss)
+	writeTransLog("", "saga fetch prepared", fmt.Sprint(len(ss)), "", "")
 	if len(ss) == 0 {
 		return
 	}
 	for _, sm := range ss {
-		writeTransLog(sm.Gid, "saga touch prepared", "", -1, "")
+		writeTransLog(sm.Gid, "saga touch prepared", "", "", "")
 		db.Must().Model(&sm).Update("id", sm.ID)
-		resp, err := dtm.RestyClient.R().SetQueryParam("gid", sm.Gid).Get(sm.TransQuery)
+		resp, err := common.RestyClient.R().SetQueryParam("gid", sm.Gid).Get(sm.QueryPrepared)
 		common.PanicIfError(err)
 		body := resp.String()
 		if strings.Contains(body, "FAIL") {
-			preparedExpire := time.Now().Add(time.Duration(-Config.PreparedExpire) * time.Second)
+			preparedExpire := time.Now().Add(time.Duration(-config.PreparedExpire) * time.Second)
 			logrus.Printf("create time: %s prepared expire: %s ", sm.CreateTime.Local(), preparedExpire.Local())
 			status := common.If(sm.CreateTime.Before(preparedExpire), "canceled", "prepared").(string)
-			writeTransLog(sm.Gid, "saga canceled", status, -1, "")
+			writeTransLog(sm.Gid, "saga canceled", status, "", "")
 			db.Must().Model(&sm).Where("status = ?", "prepared").Update("status", status)
 		} else if strings.Contains(body, "SUCCESS") {
-			saveCommitedSagaModel(&sm)
-			ProcessCommitedSaga(sm.Gid)
+			saveCommitted(&sm)
+			ProcessCommitted(&sm)
 		}
 	}
 }
@@ -44,25 +43,25 @@ func CronPrepared() {
 	}
 }
 
-func CronCommitedOnce(expire time.Duration) {
-	db := DbGet()
-	ss := []SagaModel{}
-	db.Must().Model(&SagaModel{}).Where("update_time < date_sub(now(), interval ? second)", int(expire/time.Second)).Where("status = ?", "commited").Find(&ss)
-	writeTransLog("", "saga fetch commited", fmt.Sprint(len(ss)), -1, "")
+func CronCommittedOnce(expire time.Duration) {
+	db := dbGet()
+	ss := []TransGlobalModel{}
+	db.Must().Model(&TransGlobalModel{}).Where("update_time < date_sub(now(), interval ? second)", int(expire/time.Second)).Where("status = ?", "committed").Find(&ss)
+	writeTransLog("", "saga fetch committed", fmt.Sprint(len(ss)), "", "")
 	if len(ss) == 0 {
 		return
 	}
 	for _, sm := range ss {
-		writeTransLog(sm.Gid, "saga touch commited", "", -1, "")
+		writeTransLog(sm.Gid, "saga touch committed", "", "", "")
 		db.Must().Model(&sm).Update("id", sm.ID)
-		ProcessCommitedSaga(sm.Gid)
+		ProcessCommitted(&sm)
 	}
 }
 
-func CronCommited() {
+func CronCommitted() {
 	for {
 		defer handlePanic()
-		CronCommitedOnce(10 * time.Second)
+		CronCommittedOnce(10 * time.Second)
 	}
 }
 
diff --git a/dtmsvr/db.go b/dtmsvr/db.go
index 8fe9276..2820c9a 100644
--- a/dtmsvr/db.go
+++ b/dtmsvr/db.go
@@ -1,103 +1,20 @@
 package dtmsvr
 
-import (
-	"fmt"
-	"strings"
-	"time"
+import "github.com/yedf/dtm/common"
 
-	"github.com/sirupsen/logrus"
-	"github.com/spf13/viper"
-	"github.com/yedf/dtm/common"
-	"gorm.io/driver/mysql"
-	"gorm.io/gorm"
-)
-
-var db *gorm.DB = nil
-
-type MyDb struct {
-	*gorm.DB
+func dbGet() *common.MyDb {
+	return common.DbGet(config.Mysql)
 }
-
-func (m *MyDb) Must() *MyDb {
-	db := m.InstanceSet("ivy.must", true)
-	return &MyDb{DB: db}
-}
-
-func (m *MyDb) NoMust() *MyDb {
-	db := m.InstanceSet("ivy.must", false)
-	return &MyDb{DB: db}
-}
-
-func DbGet() *MyDb {
-	LoadConfig()
-	if db == nil {
-		conf := viper.GetStringMapString("mysql")
-		dsn := fmt.Sprintf("%s:%s@tcp(%s:%s)/%s?charset=utf8mb4&parseTime=true&loc=Local", conf["user"], conf["password"], conf["host"], conf["port"], conf["database"])
-		logrus.Printf("connecting %s", strings.Replace(dsn, conf["password"], "****", 1))
-		db1, err := gorm.Open(mysql.Open(dsn), &gorm.Config{
-			SkipDefaultTransaction: true,
-		})
-		common.PanicIfError(err)
-		db1.Use(&tracePlugin{})
-		db = db1
-	}
-	return &MyDb{DB: db}
-}
-
-func writeTransLog(gid string, action string, status string, step int, detail string) {
-	db := DbGet()
+func writeTransLog(gid string, action string, status string, branch string, detail string) {
+	db := dbGet()
 	if detail == "" {
 		detail = "{}"
 	}
 	db.Must().Table("trans_log").Create(M{
-		"gid":    gid,
-		"action": action,
-		"status": status,
-		"step":   step,
-		"detail": detail,
+		"gid":        gid,
+		"action":     action,
+		"new_status": status,
+		"branch":     branch,
+		"detail":     detail,
 	})
 }
-
-type tracePlugin struct{}
-
-func (op *tracePlugin) Name() string {
-	return "tracePlugin"
-}
-
-func (op *tracePlugin) Initialize(db *gorm.DB) (err error) {
-	before := func(db *gorm.DB) {
-		db.InstanceSet("ivy.startTime", time.Now())
-	}
-
-	after := func(db *gorm.DB) {
-		_ts, _ := db.InstanceGet("ivy.startTime")
-		sql := db.Dialector.Explain(db.Statement.SQL.String(), db.Statement.Vars...)
-		logrus.Printf("used: %d ms affected: %d sql is: %s", time.Since(_ts.(time.Time)).Milliseconds(), db.RowsAffected, sql)
-		if v, ok := db.InstanceGet("ivy.must"); ok && v.(bool) {
-			if db.Error != nil && db.Error != gorm.ErrRecordNotFound {
-				panic(db.Error)
-			}
-		}
-	}
-
-	beforeName := "cb_before"
-	afterName := "cb_after"
-
-	logrus.Printf("installing db plugin: %s", op.Name())
-	// 开始前
-	_ = db.Callback().Create().Before("gorm:before_create").Register(beforeName, before)
-	_ = db.Callback().Query().Before("gorm:query").Register(beforeName, before)
-	_ = db.Callback().Delete().Before("gorm:before_delete").Register(beforeName, before)
-	_ = db.Callback().Update().Before("gorm:setup_reflect_value").Register(beforeName, before)
-	_ = db.Callback().Row().Before("gorm:row").Register(beforeName, before)
-	_ = db.Callback().Raw().Before("gorm:raw").Register(beforeName, before)
-
-	// 结束后
-	_ = db.Callback().Create().After("gorm:after_create").Register(afterName, after)
-	_ = db.Callback().Query().After("gorm:after_query").Register(afterName, after)
-	_ = db.Callback().Delete().After("gorm:after_delete").Register(afterName, after)
-	_ = db.Callback().Update().After("gorm:after_update").Register(afterName, after)
-	_ = db.Callback().Row().After("gorm:row").Register(afterName, after)
-	_ = db.Callback().Raw().After("gorm:raw").Register(afterName, after)
-	return
-}
diff --git a/dtmsvr/dtmsvr.sql b/dtmsvr/dtmsvr.sql
index ff0997b..e448100 100644
--- a/dtmsvr/dtmsvr.sql
+++ b/dtmsvr/dtmsvr.sql
@@ -27,7 +27,7 @@ CREATE TABLE `saga_step` (
   `step` int(11) NOT NULL COMMENT '处于saga中的第几步',
   `url` varchar(128) NOT NULL COMMENT '动作关联的url',
   `type` varchar(45) NOT NULL COMMENT 'saga的所有步骤',
-  `status` varchar(45) NOT NULL COMMENT '步骤的状态 pending | finished | rollbacked',
+  `status` varchar(45) NOT NULL COMMENT '步骤的状态 prepared | finished | rollbacked',
   `finish_time` datetime DEFAULT NULL,
   `rollback_time` datetime DEFAULT NULL,
   `create_time` datetime DEFAULT NULL,
@@ -52,15 +52,3 @@ CREATE TABLE `trans_log` (
   KEY `create_time` (`create_time`)
 ) ENGINE=InnoDB AUTO_INCREMENT=48 DEFAULT CHARSET=utf8mb4;
 
-drop table if EXISTS user_account;
-CREATE TABLE `user_account` (
-  `id` int(11) NOT NULL AUTO_INCREMENT,
-  `user_id` int(11) DEFAULT NULL,
-  `balance` decimal(10,2) NOT NULL DEFAULT '0.00',
-  `create_time` datetime DEFAULT CURRENT_TIMESTAMP,
-  `update_time` datetime DEFAULT CURRENT_TIMESTAMP,
-  PRIMARY KEY (`id`),
-  UNIQUE KEY `user_id` (`user_id`),
-  KEY `create_time` (`create_time`),
-  KEY `update_time` (`update_time`)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
diff --git a/dtmsvr/dtmsvr_test.go b/dtmsvr/dtmsvr_test.go
index 0423e0c..856f7e0 100644
--- a/dtmsvr/dtmsvr_test.go
+++ b/dtmsvr/dtmsvr_test.go
@@ -13,56 +13,60 @@ import (
 )
 
 var myinit int = func() int {
-	LoadConfig()
+	common.InitApp(&config)
 	return 0
 }()
 
 func TestViper(t *testing.T) {
 	assert.Equal(t, true, viper.Get("mysql") != nil)
-	assert.Equal(t, int64(90), Config.PreparedExpire)
+	assert.Equal(t, int64(90), config.PreparedExpire)
 }
 
 func TestDtmSvr(t *testing.T) {
-	SagaProcessedTestChan = make(chan string, 1)
-	// 清理数据
-	common.PanicIfError(db.Exec("truncate saga").Error)
-	common.PanicIfError(db.Exec("truncate saga_step").Error)
-	common.PanicIfError(db.Exec("truncate trans_log").Error)
+	TransProcessedTestChan = make(chan string, 1)
 
 	// 启动组件
 	go StartSvr()
 	go examples.SagaStartSvr()
+	go examples.XaStartSvr()
 	time.Sleep(time.Duration(100 * 1000 * 1000))
 
-	preparePending(t)
-	prepareCancel(t)
-	commitedPending(t)
-	noramlSaga(t)
-	rollbackSaga2(t)
+	// 清理数据
+	common.PanicIfError(dbGet().Exec("truncate trans_global").Error)
+	common.PanicIfError(dbGet().Exec("truncate trans_branch").Error)
+	common.PanicIfError(dbGet().Exec("truncate trans_log").Error)
+	examples.ResetXaData()
+
+	xaNormal(t)
+	sagaPreparePending(t)
+	sagaPrepareCancel(t)
+	sagaCommittedPending(t)
+	sagaNormal(t)
+	sagaRollback(t)
 }
 
 func TestCover(t *testing.T) {
-	db := DbGet()
+	db := dbGet()
 	db.NoMust()
 	CronPreparedOnce(0)
-	CronCommitedOnce(0)
+	CronCommittedOnce(0)
 	defer handlePanic()
 	checkAffected(db.DB)
 }
 
 // 测试使用的全局对象
-var initdb = DbGet()
+var initdb = dbGet()
 
-func getSagaModel(gid string) *SagaModel {
-	sm := SagaModel{}
-	dbr := db.Model(&sm).Where("gid=?", gid).First(&sm)
+func getSagaModel(gid string) *TransGlobalModel {
+	sm := TransGlobalModel{}
+	dbr := dbGet().Model(&sm).Where("gid=?", gid).First(&sm)
 	common.PanicIfError(dbr.Error)
 	return &sm
 }
 
-func getSagaStepStatus(gid string) []string {
-	steps := []SagaStepModel{}
-	dbr := db.Model(&SagaStepModel{}).Where("gid=?", gid).Find(&steps)
+func getBranchesStatus(gid string) []string {
+	steps := []TransBranchModel{}
+	dbr := dbGet().Model(&TransBranchModel{}).Where("gid=?", gid).Find(&steps)
 	common.PanicIfError(dbr.Error)
 	status := []string{}
 	for _, step := range steps {
@@ -71,37 +75,81 @@ func getSagaStepStatus(gid string) []string {
 	return status
 }
 
-func noramlSaga(t *testing.T) {
+func xaNormal(t *testing.T) {
+	xa := examples.XaClient
+	gid := "xa-normal"
+	err := xa.XaGlobalTransaction(gid, func() error {
+		req := examples.GenTransReq(30, false, false)
+		resp, err := common.RestyClient.R().SetBody(req).SetQueryParams(map[string]string{
+			"gid":     gid,
+			"user_id": "1",
+		}).Post(examples.XaBusi + "/TransOut")
+		common.CheckRestySuccess(resp, err)
+		resp, err = common.RestyClient.R().SetBody(req).SetQueryParams(map[string]string{
+			"gid":     gid,
+			"user_id": "2",
+		}).Post(examples.XaBusi + "/TransIn")
+		common.CheckRestySuccess(resp, err)
+		return nil
+	})
+	common.PanicIfError(err)
+	WaitTransCommitted(gid)
+	assert.Equal(t, []string{"finished", "finished"}, getBranchesStatus(gid))
+}
+
+func xaRollback(t *testing.T) {
+	xa := examples.XaClient
+	gid := "xa-rollback"
+	err := xa.XaGlobalTransaction(gid, func() error {
+		req := examples.GenTransReq(30, false, true)
+		resp, err := common.RestyClient.R().SetBody(req).SetQueryParams(map[string]string{
+			"gid":     gid,
+			"user_id": "1",
+		}).Post(examples.XaBusi + "/TransOut")
+		common.CheckRestySuccess(resp, err)
+		resp, err = common.RestyClient.R().SetBody(req).SetQueryParams(map[string]string{
+			"gid":     gid,
+			"user_id": "2",
+		}).Post(examples.XaBusi + "/TransIn")
+		common.CheckRestySuccess(resp, err)
+		return nil
+	})
+	common.PanicIfError(err)
+	WaitTransCommitted(gid)
+	assert.Equal(t, []string{"rollbacked", "rollbacked"}, getBranchesStatus(gid))
+}
+
+func sagaNormal(t *testing.T) {
 	saga := genSaga("gid-noramlSaga", false, false)
 	saga.Prepare()
 	assert.Equal(t, "prepared", getSagaModel(saga.Gid).Status)
 	saga.Commit()
-	assert.Equal(t, "commited", getSagaModel(saga.Gid).Status)
-	WaitCommitedSaga(saga.Gid)
-	assert.Equal(t, []string{"pending", "finished", "pending", "finished"}, getSagaStepStatus(saga.Gid))
+	assert.Equal(t, "committed", getSagaModel(saga.Gid).Status)
+	WaitTransCommitted(saga.Gid)
+	assert.Equal(t, []string{"prepared", "finished", "prepared", "finished"}, getBranchesStatus(saga.Gid))
 }
 
-func rollbackSaga2(t *testing.T) {
+func sagaRollback(t *testing.T) {
 	saga := genSaga("gid-rollbackSaga2", false, true)
 	saga.Commit()
-	WaitCommitedSaga(saga.Gid)
+	WaitTransCommitted(saga.Gid)
 	saga.Prepare()
 	assert.Equal(t, "rollbacked", getSagaModel(saga.Gid).Status)
-	assert.Equal(t, []string{"rollbacked", "finished", "rollbacked", "rollbacked"}, getSagaStepStatus(saga.Gid))
+	assert.Equal(t, []string{"rollbacked", "finished", "rollbacked", "rollbacked"}, getBranchesStatus(saga.Gid))
 }
 
-func prepareCancel(t *testing.T) {
+func sagaPrepareCancel(t *testing.T) {
 	saga := genSaga("gid1-prepareCancel", false, true)
 	saga.Prepare()
 	examples.TransQueryResult = "FAIL"
-	Config.PreparedExpire = -10
+	config.PreparedExpire = -10
 	CronPreparedOnce(-10 * time.Second)
 	examples.TransQueryResult = ""
-	Config.PreparedExpire = 60
+	config.PreparedExpire = 60
 	assert.Equal(t, "canceled", getSagaModel(saga.Gid).Status)
 }
 
-func preparePending(t *testing.T) {
+func sagaPreparePending(t *testing.T) {
 	saga := genSaga("gid1-preparePending", false, false)
 	saga.Prepare()
 	examples.TransQueryResult = "PENDING"
@@ -109,33 +157,29 @@ func preparePending(t *testing.T) {
 	examples.TransQueryResult = ""
 	assert.Equal(t, "prepared", getSagaModel(saga.Gid).Status)
 	CronPreparedOnce(-10 * time.Second)
-	WaitCommitedSaga(saga.Gid)
+	WaitTransCommitted(saga.Gid)
 	assert.Equal(t, "finished", getSagaModel(saga.Gid).Status)
 }
 
-func commitedPending(t *testing.T) {
-	saga := genSaga("gid-commitedPending", false, false)
+func sagaCommittedPending(t *testing.T) {
+	saga := genSaga("gid-committedPending", false, false)
 	saga.Prepare()
-	examples.TransOutResult = "PENDING"
+	examples.TransInResult = "PENDING"
 	saga.Commit()
-	WaitCommitedSaga(saga.Gid)
-	examples.TransOutResult = ""
-	assert.Equal(t, []string{"pending", "finished", "pending", "pending"}, getSagaStepStatus(saga.Gid))
-	CronCommitedOnce(-10 * time.Second)
-	WaitCommitedSaga(saga.Gid)
-	assert.Equal(t, []string{"pending", "finished", "pending", "finished"}, getSagaStepStatus(saga.Gid))
+	WaitTransCommitted(saga.Gid)
+	examples.TransInResult = ""
+	assert.Equal(t, []string{"prepared", "finished", "prepared", "prepared"}, getBranchesStatus(saga.Gid))
+	CronCommittedOnce(-10 * time.Second)
+	WaitTransCommitted(saga.Gid)
+	assert.Equal(t, []string{"prepared", "finished", "prepared", "finished"}, getBranchesStatus(saga.Gid))
 	assert.Equal(t, "finished", getSagaModel(saga.Gid).Status)
 }
 
-func genSaga(gid string, inFailed bool, outFailed bool) *dtm.Saga {
+func genSaga(gid string, outFailed bool, inFailed bool) *dtm.Saga {
 	logrus.Printf("beginning a saga test ---------------- %s", gid)
 	saga := dtm.SagaNew(examples.DtmServer, gid, examples.SagaBusi+"/TransQuery")
-	req := examples.TransReq{
-		Amount:         30,
-		TransInResult:  common.If(inFailed, "FAIL", "SUCCESS").(string),
-		TransOutResult: common.If(outFailed, "FAIL", "SUCCESS").(string),
-	}
-	saga.Add(examples.SagaBusi+"/TransIn", examples.SagaBusi+"/TransInCompensate", &req)
+	req := examples.GenTransReq(30, outFailed, inFailed)
 	saga.Add(examples.SagaBusi+"/TransOut", examples.SagaBusi+"/TransOutCompensate", &req)
+	saga.Add(examples.SagaBusi+"/TransIn", examples.SagaBusi+"/TransInCompensate", &req)
 	return saga
 }
diff --git a/dtmsvr/main.go b/dtmsvr/main.go
index b99e3dc..9118d3a 100644
--- a/dtmsvr/main.go
+++ b/dtmsvr/main.go
@@ -11,6 +11,7 @@ func Main() {
 
 func StartSvr() {
 	logrus.Printf("start dtmsvr")
+	common.InitApp(&config)
 	app := common.GetGinApp()
 	AddRoute(app)
 	logrus.Printf("dtmsvr listen at: 8080")
diff --git a/dtmsvr/service.go b/dtmsvr/service.go
index 186a6c6..8fda0d0 100644
--- a/dtmsvr/service.go
+++ b/dtmsvr/service.go
@@ -6,107 +6,145 @@ import (
 	"time"
 
 	"github.com/sirupsen/logrus"
-	"github.com/yedf/dtm"
 	"github.com/yedf/dtm/common"
 	"gorm.io/gorm"
 	"gorm.io/gorm/clause"
 )
 
-func saveCommitedSagaModel(m *SagaModel) {
-	db := DbGet()
-	m.Status = "commited"
+func saveCommitted(m *TransGlobalModel) {
+	db := dbGet()
+	m.Status = "committed"
 	err := db.Transaction(func(db1 *gorm.DB) error {
-		db := &MyDb{DB: db1}
-		writeTransLog(m.Gid, "save commited", m.Status, -1, m.Steps)
+		db := &common.MyDb{DB: db1}
+		writeTransLog(m.Gid, "save committed", m.Status, "", m.Data)
 		dbr := db.Must().Clauses(clause.OnConflict{
 			DoNothing: true,
 		}).Create(&m)
 		if dbr.RowsAffected == 0 {
-			writeTransLog(m.Gid, "change status", m.Status, -1, "")
-			db.Must().Model(&m).Where("status=?", "prepared").Update("status", "commited")
+			writeTransLog(m.Gid, "change status", m.Status, "", "")
+			db.Must().Model(&m).Where("status=?", "prepared").Update("status", "committed")
 		}
-		nsteps := []SagaStepModel{}
-		steps := []M{}
-		common.MustUnmarshalString(m.Steps, &steps)
-		for _, step := range steps {
-			nsteps = append(nsteps, SagaStepModel{
-				Gid:    m.Gid,
-				Step:   len(nsteps) + 1,
-				Data:   step["post_data"].(string),
-				Url:    step["compensate"].(string),
-				Type:   "compensate",
-				Status: "pending",
-			})
-			nsteps = append(nsteps, SagaStepModel{
-				Gid:    m.Gid,
-				Step:   len(nsteps) + 1,
-				Data:   step["post_data"].(string),
-				Url:    step["action"].(string),
-				Type:   "action",
-				Status: "pending",
-			})
+		if m.TransType == "saga" {
+			nsteps := []TransBranchModel{}
+			steps := []M{}
+			common.MustUnmarshalString(m.Data, &steps)
+			for _, step := range steps {
+				nsteps = append(nsteps, TransBranchModel{
+					Gid:        m.Gid,
+					Branch:     fmt.Sprintf("%d", len(nsteps)+1),
+					Data:       step["data"].(string),
+					Url:        step["compensate"].(string),
+					BranchType: "compensate",
+					Status:     "prepared",
+				})
+				nsteps = append(nsteps, TransBranchModel{
+					Gid:        m.Gid,
+					Branch:     fmt.Sprintf("%d", len(nsteps)+1),
+					Data:       step["data"].(string),
+					Url:        step["action"].(string),
+					BranchType: "action",
+					Status:     "prepared",
+				})
+			}
+			writeTransLog(m.Gid, "save steps", m.Status, "", common.MustMarshalString(nsteps))
+			db.Must().Clauses(clause.OnConflict{
+				DoNothing: true,
+			}).Create(&nsteps)
 		}
-		writeTransLog(m.Gid, "save steps", m.Status, -1, common.MustMarshalString(nsteps))
-		db.Must().Clauses(clause.OnConflict{
-			DoNothing: true,
-		}).Create(&nsteps)
 		return nil
 	})
 	common.PanicIfError(err)
 }
 
-var SagaProcessedTestChan chan string = nil // 用于测试时，通知处理结束
+var TransProcessedTestChan chan string = nil // 用于测试时，通知处理结束
 
-func WaitCommitedSaga(gid string) {
-	id := <-SagaProcessedTestChan
+func WaitTransCommitted(gid string) {
+	id := <-TransProcessedTestChan
 	for id != gid {
 		logrus.Errorf("-------id %s not match gid %s", id, gid)
-		id = <-SagaProcessedTestChan
+		id = <-TransProcessedTestChan
 	}
 }
 
-func ProcessCommitedSaga(gid string) {
-	err := innerProcessCommitedSaga(gid)
+func ProcessCommitted(trans *TransGlobalModel) {
+	err := innerProcessCommitted(trans)
 	if err != nil {
-		logrus.Errorf("process commited saga error: %s", err.Error())
+		logrus.Errorf("process committed error: %s", err.Error())
 	}
-	if SagaProcessedTestChan != nil {
-		SagaProcessedTestChan <- gid
+	if TransProcessedTestChan != nil {
+		TransProcessedTestChan <- trans.Gid
 	}
 }
-func checkAffected(db1 *gorm.DB) {
-	if db1.RowsAffected == 0 {
-		panic(fmt.Errorf("duplicate updating"))
+func innerProcessCommitted(trans *TransGlobalModel) (rerr error) {
+	branches := []TransBranchModel{}
+	db := dbGet()
+	db.Must().Order("id asc").Find(&branches)
+	if trans.TransType == "saga" {
+		return innerProcessCommittedSaga(trans, db, branches)
+	} else if trans.TransType == "xa" {
+		return innerProcessCommittedXa(trans, db, branches)
 	}
+	panic(fmt.Errorf("unkown trans type: %s", trans.TransType))
 }
 
-func innerProcessCommitedSaga(gid string) (rerr error) {
-	steps := []SagaStepModel{}
-	db := DbGet()
-	db.Must().Order("id asc").Find(&steps)
-	current := 0 // 当前正在处理的步骤
-	for ; current < len(steps); current++ {
-		step := steps[current]
-		if step.Type == "compensate" && step.Status == "pending" || step.Type == "action" && step.Status == "finished" {
+func innerProcessCommittedXa(trans *TransGlobalModel, db *common.MyDb, branches []TransBranchModel) error {
+	gid := trans.Gid
+	for _, branch := range branches {
+		if branch.Status == "finished" {
 			continue
 		}
-		if step.Type == "action" && step.Status == "pending" {
-			resp, err := dtm.RestyClient.R().SetBody(step.Data).SetQueryParam("gid", step.Gid).Post(step.Url)
+		db.Must().Model(&TransGlobalModel{}).Where("gid=?", gid).Update("gid", gid) // 更新update_time，避免被定时任务再次
+		resp, err := common.RestyClient.R().SetBody(M{
+			"branch": branch.Branch,
+			"action": "commit",
+			"gid":    branch.Gid,
+		}).Post(branch.Url)
+		if err != nil {
+			return err
+		}
+		body := resp.String()
+		if !strings.Contains(body, "SUCCESS") {
+			return fmt.Errorf("bad response: %s", body)
+		}
+		writeTransLog(gid, "step finished", "finished", branch.Branch, "")
+		db.Must().Model(&branch).Where("status=?", "prepared").Updates(M{
+			"status":      "finished",
+			"finish_time": time.Now(),
+		})
+	}
+	writeTransLog(gid, "xa finished", "finished", "", "")
+	db.Must().Model(&TransGlobalModel{}).Where("gid=? and status=?", gid, "committed").Updates(M{
+		"status":      "finished",
+		"finish_time": time.Now(),
+	})
+	return nil
+}
+
+func innerProcessCommittedSaga(trans *TransGlobalModel, db *common.MyDb, branches []TransBranchModel) error {
+	gid := trans.Gid
+	current := 0 // 当前正在处理的步骤
+	for ; current < len(branches); current++ {
+		step := branches[current]
+		if step.BranchType == "compensate" && step.Status == "prepared" || step.BranchType == "action" && step.Status == "finished" {
+			continue
+		}
+		if step.BranchType == "action" && step.Status == "prepared" {
+			resp, err := common.RestyClient.R().SetBody(step.Data).SetQueryParam("gid", step.Gid).Post(step.Url)
 			if err != nil {
 				return err
 			}
 			body := resp.String()
-			db.Must().Model(&SagaModel{}).Where("gid=?", gid).Update("gid", gid) // 更新update_time，避免被定时任务再次
+			db.Must().Model(&TransGlobalModel{}).Where("gid=?", gid).Update("gid", gid) // 更新update_time，避免被定时任务再次
 			if strings.Contains(body, "SUCCESS") {
-				writeTransLog(gid, "step finished", "finished", step.Step, "")
-				dbr := db.Must().Model(&step).Where("status=?", "pending").Updates(M{
+				writeTransLog(gid, "step finished", "finished", step.Branch, "")
+				dbr := db.Must().Model(&step).Where("status=?", "prepared").Updates(M{
 					"status":      "finished",
 					"finish_time": time.Now(),
 				})
 				checkAffected(dbr)
 			} else if strings.Contains(body, "FAIL") {
-				writeTransLog(gid, "step rollbacked", "rollbacked", step.Step, "")
-				dbr := db.Must().Model(&step).Where("status=?", "pending").Updates(M{
+				writeTransLog(gid, "step rollbacked", "rollbacked", step.Branch, "")
+				dbr := db.Must().Model(&step).Where("status=?", "prepared").Updates(M{
 					"status":        "rollbacked",
 					"rollback_time": time.Now(),
 				})
@@ -117,9 +155,9 @@ func innerProcessCommitedSaga(gid string) (rerr error) {
 			}
 		}
 	}
-	if current == len(steps) { // saga 事务完成
-		writeTransLog(gid, "saga finished", "finished", -1, "")
-		dbr := db.Must().Model(&SagaModel{}).Where("gid=? and status=?", gid, "commited").Updates(M{
+	if current == len(branches) { // saga 事务完成
+		writeTransLog(gid, "saga finished", "finished", "", "")
+		dbr := db.Must().Model(&TransGlobalModel{}).Where("gid=? and status=?", gid, "committed").Updates(M{
 			"status":      "finished",
 			"finish_time": time.Now(),
 		})
@@ -127,17 +165,17 @@ func innerProcessCommitedSaga(gid string) (rerr error) {
 		return nil
 	}
 	for current = current - 1; current >= 0; current-- {
-		step := steps[current]
-		if step.Type != "compensate" || step.Status != "pending" {
+		step := branches[current]
+		if step.BranchType != "compensate" || step.Status != "prepared" {
 			continue
 		}
-		resp, err := dtm.RestyClient.R().SetBody(step.Data).SetQueryParam("gid", step.Gid).Post(step.Url)
+		resp, err := common.RestyClient.R().SetBody(step.Data).SetQueryParam("gid", step.Gid).Post(step.Url)
 		if err != nil {
 			return err
 		}
 		body := resp.String()
 		if strings.Contains(body, "SUCCESS") {
-			writeTransLog(gid, "step rollbacked", "rollbacked", step.Step, "")
+			writeTransLog(gid, "step rollbacked", "rollbacked", step.Branch, "")
 			dbr := db.Must().Model(&step).Where("status=?", step.Status).Updates(M{
 				"status":        "rollbacked",
 				"rollback_time": time.Now(),
@@ -150,11 +188,17 @@ func innerProcessCommitedSaga(gid string) (rerr error) {
 	if current != -1 {
 		return fmt.Errorf("saga current not -1")
 	}
-	writeTransLog(gid, "saga rollbacked", "rollbacked", -1, "")
-	dbr := db.Must().Model(&SagaModel{}).Where("status=? and gid=?", "commited", gid).Updates(M{
+	writeTransLog(gid, "saga rollbacked", "rollbacked", "", "")
+	dbr := db.Must().Model(&TransGlobalModel{}).Where("status=? and gid=?", "committed", gid).Updates(M{
 		"status":        "rollbacked",
 		"rollback_time": time.Now(),
 	})
 	checkAffected(dbr)
 	return nil
 }
+
+func checkAffected(db1 *gorm.DB) {
+	if db1.RowsAffected == 0 {
+		panic(fmt.Errorf("duplicate updating"))
+	}
+}
diff --git a/dtmsvr/types.go b/dtmsvr/types.go
index 2a13f28..7dbf9ad 100644
--- a/dtmsvr/types.go
+++ b/dtmsvr/types.go
@@ -2,41 +2,40 @@ package dtmsvr
 
 import (
 	"time"
+
+	"github.com/yedf/dtm/common"
 )
 
 type M = map[string]interface{}
 
-type ModelBase struct {
-	ID         uint
-	CreateTime *time.Time `gorm:"autoCreateTime"`
-	UpdateTime *time.Time `gorm:"autoUpdateTime"`
-}
-type SagaModel struct {
-	ModelBase
-	Gid          string `json:"gid"`
-	Steps        string `json:"steps"`
-	TransQuery   string `json:"trans_query"`
-	Status       string `json:"status"`
-	FinishTime   *time.Time
-	RollbackTime *time.Time
+type TransGlobalModel struct {
+	common.ModelBase
+	Gid           string `json:"gid"`
+	TransType     string `json:"trans_type"`
+	Data          string `json:"data"`
+	Status        string `json:"status"`
+	QueryPrepared string `json:"query_prepared"`
+	CommitTime    *time.Time
+	FinishTime    *time.Time
+	RollbackTime  *time.Time
 }
 
-func (*SagaModel) TableName() string {
-	return "saga"
+func (*TransGlobalModel) TableName() string {
+	return "trans_global"
 }
 
-type SagaStepModel struct {
-	ModelBase
+type TransBranchModel struct {
+	common.ModelBase
 	Gid          string
-	Data         string
-	Step         int
 	Url          string
-	Type         string
+	Data         string
+	Branch       string
+	BranchType   string
 	Status       string
 	FinishTime   *time.Time
 	RollbackTime *time.Time
 }
 
-func (*SagaStepModel) TableName() string {
-	return "saga_step"
+func (*TransBranchModel) TableName() string {
+	return "trans_branch"
 }
diff --git a/examples/conf.yml.sample b/examples/conf.yml.sample
new file mode 100644
index 0000000..e69de29
diff --git a/examples/config.go b/examples/config.go
index 502fb27..1f787be 100644
--- a/examples/config.go
+++ b/examples/config.go
@@ -1,4 +1,7 @@
 package examples
 
-// 指定dtm服务地址
-const DtmServer = "http://localhost:8080/api/dtmsvr"
+type exampleConfig struct {
+	Mysql map[string]string
+}
+
+var Config = exampleConfig{}
diff --git a/examples/examples.sql b/examples/examples.sql
new file mode 100644
index 0000000..b5e2d9d
--- /dev/null
+++ b/examples/examples.sql
@@ -0,0 +1,13 @@
+use dtm_busi;
+drop table if exists user_account;
+create table user_account(
+  id int(11) PRIMARY KEY AUTO_INCREMENT,
+  user_id int(11) UNIQUE ,
+  balance DECIMAL(10, 2) not null default '0',
+  create_time datetime DEFAULT now(),
+  update_time datetime DEFAULT now(),
+  key(create_time),
+  key(update_time)
+);
+
+insert into user_account (user_id, balance) values (1, 10000), (2, 10000);
\ No newline at end of file
diff --git a/examples/saga_main.go b/examples/saga_main.go
index fa18441..b4991cc 100644
--- a/examples/saga_main.go
+++ b/examples/saga_main.go
@@ -39,8 +39,8 @@ func sagaFireRequest() {
 	}
 	saga := dtm.SagaNew(DtmServer, gid, SagaBusi+"/TransQuery")
 
-	saga.Add(SagaBusi+"/TransIn", SagaBusi+"/TransInCompensate", req)
 	saga.Add(SagaBusi+"/TransOut", SagaBusi+"/TransOutCompensate", req)
+	saga.Add(SagaBusi+"/TransIn", SagaBusi+"/TransInCompensate", req)
 	err := saga.Prepare()
 	common.PanicIfError(err)
 	logrus.Printf("busi trans commit")
@@ -67,12 +67,6 @@ var TransInCompensateResult = ""
 var TransOutCompensateResult = ""
 var TransQueryResult = ""
 
-type TransReq struct {
-	Amount         int    `json:"amount"`
-	TransInResult  string `json:"transInResult"`
-	TransOutResult string `json:"transOutResult"`
-}
-
 func transReqFromContext(c *gin.Context) *TransReq {
 	req := TransReq{}
 	err := c.BindJSON(&req)
diff --git a/examples/types.go b/examples/types.go
new file mode 100644
index 0000000..49d6c0b
--- /dev/null
+++ b/examples/types.go
@@ -0,0 +1,11 @@
+package examples
+
+import "github.com/yedf/dtm/common"
+
+type UserAccount struct {
+	common.ModelBase
+	UserId  int
+	Balance string
+}
+
+func (u *UserAccount) TableName() string { return "user_account" }
diff --git a/examples/utils.go b/examples/utils.go
new file mode 100644
index 0000000..4efc547
--- /dev/null
+++ b/examples/utils.go
@@ -0,0 +1,20 @@
+package examples
+
+import "github.com/yedf/dtm/common"
+
+// 指定dtm服务地址
+const DtmServer = "http://localhost:8080/api/dtmsvr"
+
+type TransReq struct {
+	Amount         int    `json:"amount"`
+	TransInResult  string `json:"transInResult"`
+	TransOutResult string `json:"transOutResult"`
+}
+
+func GenTransReq(amount int, outFailed bool, inFailed bool) *TransReq {
+	return &TransReq{
+		Amount:         amount,
+		TransOutResult: common.If(outFailed, "FAIL", "SUCCESS").(string),
+		TransInResult:  common.If(inFailed, "FAIL", "SUCCESS").(string),
+	}
+}
diff --git a/examples/xa_main.go b/examples/xa_main.go
index b223e51..4e5b2e5 100644
--- a/examples/xa_main.go
+++ b/examples/xa_main.go
@@ -4,8 +4,11 @@ import (
 	"fmt"
 	"time"
 
+	"github.com/gin-gonic/gin"
 	"github.com/sirupsen/logrus"
+	"github.com/yedf/dtm"
 	"github.com/yedf/dtm/common"
+	"gorm.io/gorm"
 )
 
 // 事务参与者的服务地址
@@ -14,21 +17,84 @@ const XaBusiApi = "/api/busi_xa"
 
 var XaBusi = fmt.Sprintf("http://localhost:%d%s", XaBusiPort, XaBusiApi)
 
+var XaClient *dtm.XaClient = nil
+
 func XaMain() {
 	go XaStartSvr()
-	xaFireRequest()
+	time.Sleep(100 * time.Millisecond)
+	XaFireRequest()
 	time.Sleep(1000 * time.Second)
 }
 
 func XaStartSvr() {
+	common.InitApp(&Config)
 	logrus.Printf("xa examples starting")
 	app := common.GetGinApp()
-	AddRoute(app)
-	app.Run(":8081")
+	XaClient = dtm.XaClientNew(DtmServer, Config.Mysql, app, XaBusi+"/xa")
+	XaAddRoute(app)
+	app.Run(fmt.Sprintf(":%d", XaBusiPort))
 }
 
-func xaFireRequest() {
-
+func XaFireRequest() {
+	gid := common.GenGid()
+	err := XaClient.XaGlobalTransaction(gid, func() (rerr error) {
+		defer common.Panic2Error(&rerr)
+		req := GenTransReq(30, false, false)
+		resp, err := common.RestyClient.R().SetBody(req).SetQueryParams(map[string]string{
+			"gid":     gid,
+			"user_id": "1",
+		}).Post(XaBusi + "/TransOut")
+		common.CheckRestySuccess(resp, err)
+		resp, err = common.RestyClient.R().SetBody(req).SetQueryParams(map[string]string{
+			"gid":     gid,
+			"user_id": "2",
+		}).Post(XaBusi + "/TransOut")
+		common.CheckRestySuccess(resp, err)
+		return nil
+	})
+	common.PanicIfError(err)
 }
 
 // api
+func XaAddRoute(app *gin.Engine) {
+	app.POST(XaBusiApi+"/TransIn", common.WrapHandler(XaTransIn))
+	app.POST(XaBusiApi+"/TransOut", common.WrapHandler(XaTransOut))
+}
+
+func XaTransIn(c *gin.Context) (interface{}, error) {
+	err := XaClient.XaLocalTransaction(c.Query("gid"), func(db *common.MyDb) (rerr error) {
+		dbr := db.Model(&UserAccount{}).Where("user_id = ?", c.Query("user_id")).
+			Update("balance", gorm.Expr("balance - ?", transReqFromContext(c).Amount))
+		return dbr.Error
+	})
+	common.PanicIfError(err)
+	return M{"result": "SUCCESS"}, nil
+}
+
+func XaTransOut(c *gin.Context) (interface{}, error) {
+	err := XaClient.XaLocalTransaction(c.Query("gid"), func(db *common.MyDb) (rerr error) {
+		dbr := db.Model(&UserAccount{}).Where("user_id = ?", c.Query("user_id")).
+			Update("balance", gorm.Expr("balance + ?", transReqFromContext(c).Amount))
+		return dbr.Error
+	})
+	common.PanicIfError(err)
+	return M{"result": "SUCCESS"}, nil
+}
+
+func ResetXaData() {
+	db := dbGet()
+	db.Must().Exec("truncate user_account")
+	db.Must().Exec("insert into user_account (user_id, balance) values (1, 10000), (2, 10000)")
+	type XaRow struct {
+		Data string
+	}
+	xas := []XaRow{}
+	db.Must().Raw("xa recover").Scan(&xas)
+	for _, xa := range xas {
+		db.Must().Exec(fmt.Sprintf("xa rollback '%s'", xa.Data))
+	}
+}
+
+func dbGet() *common.MyDb {
+	return common.DbGet(Config.Mysql)
+}
diff --git a/saga.go b/saga.go
index ca989df..4b41fb0 100644
--- a/saga.go
+++ b/saga.go
@@ -3,10 +3,9 @@ package dtm
 import (
 	"encoding/json"
 	"fmt"
-	"time"
 
-	"github.com/go-resty/resty/v2"
 	"github.com/sirupsen/logrus"
+	"github.com/yedf/dtm/common"
 )
 
 type Saga struct {
@@ -15,21 +14,23 @@ type Saga struct {
 }
 
 type SagaData struct {
-	Gid        string     `json:"gid"`
-	Steps      []SagaStep `json:"steps"`
-	TransQuery string     `json:"trans_query"`
+	Gid           string     `json:"gid"`
+	TransType     string     `json:"trans_type"`
+	Steps         []SagaStep `json:"steps"`
+	QueryPrepared string     `json:"query_prepared"`
 }
 type SagaStep struct {
 	Action     string `json:"action"`
 	Compensate string `json:"compensate"`
-	PostData   string `json:"post_data"`
+	Data       string `json:"data"`
 }
 
-func SagaNew(server string, gid string, transQuery string) *Saga {
+func SagaNew(server string, gid string, queryPrepared string) *Saga {
 	return &Saga{
 		SagaData: SagaData{
-			Gid:        gid,
-			TransQuery: transQuery,
+			Gid:           gid,
+			TransType:     "saga",
+			QueryPrepared: queryPrepared,
 		},
 		Server: server,
 	}
@@ -43,7 +44,7 @@ func (s *Saga) Add(action string, compensate string, postData interface{}) error
 	step := SagaStep{
 		Action:     action,
 		Compensate: compensate,
-		PostData:   string(d),
+		Data:       string(d),
 	}
 	s.Steps = append(s.Steps, step)
 	return nil
@@ -51,7 +52,7 @@ func (s *Saga) Add(action string, compensate string, postData interface{}) error
 
 func (s *Saga) Prepare() error {
 	logrus.Printf("preparing %s body: %v", s.Gid, &s.SagaData)
-	resp, err := RestyClient.R().SetBody(&s.SagaData).Post(fmt.Sprintf("%s/prepare", s.Server))
+	resp, err := common.RestyClient.R().SetBody(&s.SagaData).Post(fmt.Sprintf("%s/prepare", s.Server))
 	if err != nil {
 		return err
 	}
@@ -63,7 +64,7 @@ func (s *Saga) Prepare() error {
 
 func (s *Saga) Commit() error {
 	logrus.Printf("committing %s body: %v", s.Gid, &s.SagaData)
-	resp, err := RestyClient.R().SetBody(&s.SagaData).Post(fmt.Sprintf("%s/commit", s.Server))
+	resp, err := common.RestyClient.R().SetBody(&s.SagaData).Post(fmt.Sprintf("%s/commit", s.Server))
 	if err != nil {
 		return err
 	}
@@ -72,21 +73,3 @@ func (s *Saga) Commit() error {
 	}
 	return nil
 }
-
-// 辅助工具与代码
-var RestyClient = resty.New()
-
-func init() {
-	RestyClient.SetTimeout(3 * time.Second)
-	RestyClient.SetRetryCount(2)
-	RestyClient.SetRetryWaitTime(1 * time.Second)
-	RestyClient.OnBeforeRequest(func(c *resty.Client, r *resty.Request) error {
-		logrus.Printf("requesting: %s %s %v", r.Method, r.URL, r.Body)
-		return nil
-	})
-	RestyClient.OnAfterResponse(func(c *resty.Client, resp *resty.Response) error {
-		r := resp.Request
-		logrus.Printf("requested: %s %s %s", r.Method, r.URL, resp.String())
-		return nil
-	})
-}
diff --git a/xa.go b/xa.go
new file mode 100644
index 0000000..1e5a2d2
--- /dev/null
+++ b/xa.go
@@ -0,0 +1,113 @@
+package dtm
+
+import (
+	"fmt"
+	"net/url"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+	"github.com/sirupsen/logrus"
+	"github.com/yedf/dtm/common"
+)
+
+type M = map[string]interface{}
+type XaGlobalFunc func() error
+
+type XaLocalFunc func(db *common.MyDb) error
+
+type XaClient struct {
+	Server      string
+	Conf        map[string]string
+	CallbackUrl string
+}
+
+func XaClientNew(server string, mysqlConf map[string]string, app *gin.Engine, callbackUrl string) *XaClient {
+	xa := &XaClient{
+		Server:      server,
+		Conf:        mysqlConf,
+		CallbackUrl: callbackUrl,
+	}
+	u, err := url.Parse(callbackUrl)
+	common.PanicIfError(err)
+	app.POST(u.Path, common.WrapHandler(func(c *gin.Context) (interface{}, error) {
+		type CallbackReq struct {
+			Gid    string `json:"gid"`
+			Branch string `json:"branch"`
+			Action string `json:"action"`
+		}
+		req := CallbackReq{}
+		b, err := c.GetRawData()
+		common.PanicIfError(err)
+		common.MustUnmarshal(b, &req)
+		tx, my := common.DbAlone(xa.Conf)
+		defer func() {
+			logrus.Printf("closing conn %v", xa.Conf)
+			my.Close()
+		}()
+		if req.Action == "commit" {
+			tx.Must().Exec(fmt.Sprintf("xa commit '%s'", req.Branch))
+		} else if req.Action == "rollback" {
+			tx.Must().Exec(fmt.Sprintf("xa rollback '%s'", req.Branch))
+		} else {
+			panic(fmt.Errorf("unknown action: %s", req.Action))
+		}
+		return M{"result": "SUCCESS"}, nil
+	}))
+	return xa
+}
+func (xa *XaClient) XaLocalTransaction(gid string, transFunc XaLocalFunc) (rerr error) {
+	defer common.Panic2Error(&rerr)
+	branch := common.GenGid()
+	tx, my := common.DbAlone(xa.Conf)
+	defer func() {
+		logrus.Printf("closing conn %v", xa.Conf)
+		my.Close()
+	}()
+	// tx1 := db.Session(&gorm.Session{SkipDefaultTransaction: true})
+	// common.PanicIfError(tx1.Error)
+	// tx := common.MyDb{DB: tx1}
+	tx.Must().Exec(fmt.Sprintf("XA start '%s'", branch))
+	err := transFunc(tx)
+	common.PanicIfError(err)
+	resp, err := common.RestyClient.R().
+		SetBody(&M{"gid": gid, "branch": branch, "trans_type": "xa", "status": "prepared", "url": xa.CallbackUrl}).
+		Post(xa.Server + "/branch")
+	common.PanicIfError(err)
+	if !strings.Contains(resp.String(), "SUCCESS") {
+		common.PanicIfError(fmt.Errorf("unknown server response: %s", resp.String()))
+	}
+	tx.Must().Exec(fmt.Sprintf("XA end '%s'", branch))
+	tx.Must().Exec(fmt.Sprintf("XA prepare '%s'", branch))
+	return nil
+}
+
+func (xa *XaClient) XaGlobalTransaction(gid string, transFunc XaGlobalFunc) (rerr error) {
+	data := &M{
+		"gid":        gid,
+		"trans_type": "xa",
+	}
+	defer func() {
+		x := recover()
+		if x != nil {
+			_, _ = common.RestyClient.R().SetBody(data).Post(xa.Server + "/rollback")
+			rerr = x.(error)
+		}
+	}()
+	resp, err := common.RestyClient.R().SetBody(data).Post(xa.Server + "/prepare")
+	common.PanicIfError(err)
+	if !strings.Contains(resp.String(), "SUCCESS") {
+		panic(fmt.Errorf("unexpected result: %s", resp.String()))
+	}
+	err = transFunc()
+	common.PanicIfError(err)
+	resp, err = common.RestyClient.R().SetBody(data).Post(xa.Server + "/commit")
+	common.PanicIfError(err)
+	if !strings.Contains(resp.String(), "SUCCESS") {
+		panic(fmt.Errorf("unexpected result: %s", resp.String()))
+	}
+	return nil
+}
+
+func getDb(conf map[string]string) *common.MyDb {
+	return common.DbGet(conf)
+}