🔥A cross-language distributed transaction manager. Support xa, tcc, saga, transactional messages. 跨语言分布式事务管理器
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package busi
import (
"context"
"errors"
"fmt"
"strings"
"github.com/dtm-labs/dtm/client/dtmcli"
"github.com/dtm-labs/dtm/client/dtmcli/dtmimp"
"github.com/dtm-labs/dtm/dtmutil"
"github.com/dtm-labs/logger"
"github.com/gin-gonic/gin"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/mongo"
codes "google.golang.org/grpc/codes"
status "google.golang.org/grpc/status"
)
// PopulateDB populate example mysql data
func PopulateDB(skipDrop bool) {
ResetXaData()
file := fmt.Sprintf("%s/busi.%s.sql", dtmutil.GetSQLDir(), BusiConf.Driver)
dtmutil.RunSQLScript(BusiConf, file, skipDrop)
file = fmt.Sprintf("%s/dtmcli.barrier.%s.sql", dtmutil.GetSQLDir(), BusiConf.Driver)
dtmutil.RunSQLScript(BusiConf, file, skipDrop)
file = fmt.Sprintf("%s/dtmsvr.storage.%s.sql", dtmutil.GetSQLDir(), BusiConf.Driver)
dtmutil.RunSQLScript(BusiConf, file, skipDrop)
_, err := RedisGet().FlushAll(context.Background()).Result() // redis barrier need clear
dtmimp.E2P(err)
SetRedisBothAccount(10000, 10000)
SetupMongoBarrierAndBusi()
}
// TransOutUID 1
const TransOutUID = 1
// TransInUID 2
const TransInUID = 2
// Redis 1
const Redis = "redis"
// Mongo 1
const Mongo = "mongo"
func handleGrpcBusiness(in *ReqGrpc, result1 string, result2 string, busi string) error {
res := dtmimp.OrString(result1, result2, dtmcli.ResultSuccess)
logger.Debugf("grpc busi %s %v %s %s result: %s", busi, in, result1, result2, res)
if res == dtmcli.ResultSuccess {
return nil
} else if res == dtmcli.ResultFailure {
return status.New(codes.Aborted, fmt.Sprintf("reason:%s", MainSwitch.FailureReason.Fetch())).Err()
} else if res == dtmcli.ResultOngoing {
return status.New(codes.FailedPrecondition, dtmcli.ResultOngoing).Err()
}
return status.New(codes.Internal, fmt.Sprintf("unknow result %s", res)).Err()
}
func handleGeneralBusiness(c *gin.Context, result1 string, result2 string, busi string) interface{} {
info := infoFromContext(c)
res := dtmimp.OrString(result1, result2, dtmcli.ResultSuccess)
logger.Debugf("%s %s result: %s", busi, info.String(), res)
if res == "ERROR" {
return errors.New("ERROR from user")
}
if res == dtmimp.ResultFailure {
return fmt.Errorf("reason:%s. %w", MainSwitch.FailureReason.Fetch(), dtmimp.ErrFailure)
}
return string2DtmError(res)
}
// old business handler. for compatible usage
func handleGeneralBusinessCompatible(c *gin.Context, result1 string, result2 string, busi string) (interface{}, error) {
info := infoFromContext(c)
res := dtmimp.OrString(result1, result2, dtmcli.ResultSuccess)
logger.Debugf("%s %s result: %s", busi, info.String(), res)
if res == "ERROR" {
return nil, errors.New("ERROR from user")
}
return map[string]interface{}{"dtm_result": res}, nil
}
func sagaGrpcAdjustBalance(db dtmcli.DB, uid int, amount int64, result string) error {
if result == dtmcli.ResultFailure {
return status.New(codes.Aborted, dtmcli.ResultFailure).Err()
}
_, err := dtmimp.DBExec(BusiConf.Driver, db, "update dtm_busi.user_account set balance = balance + ? where user_id = ?", amount, uid)
return err
}
// SagaAdjustBalance 1
func SagaAdjustBalance(db dtmcli.DB, uid int, amount int, result string) error {
if strings.Contains(result, dtmcli.ResultFailure) {
return dtmcli.ErrFailure
}
_, err := dtmimp.DBExec(BusiConf.Driver, db, "update dtm_busi.user_account set balance = balance + ? where user_id = ?", amount, uid)
return err
}
// SagaMongoAdjustBalance 1
func SagaMongoAdjustBalance(ctx context.Context, mc *mongo.Client, uid int, amount int, result string) error {
if strings.Contains(result, dtmcli.ResultFailure) {
return dtmcli.ErrFailure
}
_, err := mc.Database("dtm_busi").Collection("user_account").UpdateOne(ctx,
bson.D{{Key: "user_id", Value: uid}},
bson.D{{Key: "$inc", Value: bson.D{{Key: "balance", Value: amount}}}})
logger.Debugf("dtm_busi.user_account $inc balance of %d by %d err: %v", uid, amount, err)
if err != nil {
return err
}
var res bson.M
err = mc.Database("dtm_busi").Collection("user_account").FindOne(ctx,
bson.D{{Key: "user_id", Value: uid}}).Decode(&res)
if err != nil {
return err
}
balance := res["balance"].(float64)
if balance < 0 {
return fmt.Errorf("balance not enough %w", dtmcli.ErrFailure)
}
return nil
}
func tccAdjustTrading(db dtmcli.DB, uid int, amount int) error {
affected, err := dtmimp.DBExec(BusiConf.Driver, db, `update dtm_busi.user_account
set trading_balance=trading_balance+?
where user_id=? and trading_balance + ? + balance >= 0`, amount, uid, amount)
if err == nil && affected == 0 {
return fmt.Errorf("update error, maybe balance not enough")
}
return err
}
func tccAdjustBalance(db dtmcli.DB, uid int, amount int) error {
affected, err := dtmimp.DBExec(BusiConf.Driver, db, `update dtm_busi.user_account
set trading_balance=trading_balance-?,
balance=balance+? where user_id=?`, amount, amount, uid)
if err == nil && affected == 0 {
return fmt.Errorf("update user_account 0 rows")
}
return err
}