103 lines
2.6 KiB
Go
103 lines
2.6 KiB
Go
package dtmcli
|
||
|
||
import (
|
||
"errors"
|
||
"fmt"
|
||
"strings"
|
||
|
||
"github.com/go-resty/resty/v2"
|
||
"github.com/yedf/dtm/common"
|
||
)
|
||
|
||
// MustGenGid generate a new gid
|
||
func MustGenGid(server string) string {
|
||
res := common.MS{}
|
||
resp, err := common.RestyClient.R().SetResult(&res).Get(server + "/newGid")
|
||
if err != nil || res["gid"] == "" {
|
||
panic(fmt.Errorf("newGid error: %v, resp: %s", err, resp))
|
||
}
|
||
return res["gid"]
|
||
}
|
||
|
||
// CheckResponse 检查Response，返回错误
|
||
func CheckResponse(resp *resty.Response, err error) error {
|
||
if err == nil && resp != nil {
|
||
if resp.IsError() {
|
||
return errors.New(resp.String())
|
||
} else if strings.Contains(resp.String(), "FAILURE") {
|
||
return ErrFailure
|
||
}
|
||
}
|
||
return err
|
||
}
|
||
|
||
// CheckResult 检查Result，返回错误
|
||
func CheckResult(res interface{}, err error) error {
|
||
resp, ok := res.(*resty.Response)
|
||
if ok {
|
||
return CheckResponse(resp, err)
|
||
}
|
||
if res != nil && strings.Contains(common.MustMarshalString(res), "FAILURE") {
|
||
return ErrFailure
|
||
}
|
||
return err
|
||
}
|
||
|
||
// IDGenerator used to generate a branch id
|
||
type IDGenerator struct {
|
||
parentID string
|
||
branchID int
|
||
}
|
||
|
||
// NewBranchID generate a branch id
|
||
func (g *IDGenerator) NewBranchID() string {
|
||
if g.branchID >= 99 {
|
||
panic(fmt.Errorf("branch id is larger than 99"))
|
||
}
|
||
if len(g.parentID) >= 20 {
|
||
panic(fmt.Errorf("total branch id is longer than 20"))
|
||
}
|
||
g.branchID = g.branchID + 1
|
||
return g.parentID + fmt.Sprintf("%02d", g.branchID)
|
||
}
|
||
|
||
// TransOptions 提交/终止事务的选项
|
||
type TransOptions struct {
|
||
// WaitResult 是否等待全局事务的最终结果
|
||
WaitResult bool
|
||
}
|
||
|
||
// TransResult dtm 返回的结果
|
||
type TransResult struct {
|
||
DtmResult string `json:"dtm_result"`
|
||
Message string
|
||
}
|
||
|
||
// CallDtm 调用dtm服务器，返回事务的状态
|
||
func CallDtm(dtm string, body interface{}, operation string, opt *TransOptions) error {
|
||
resp, err := common.RestyClient.R().SetQueryParams(common.MS{
|
||
"wait_result": common.If(opt.WaitResult, "1", "").(string),
|
||
}).SetResult(&TransResult{}).SetBody(body).Post(fmt.Sprintf("%s/%s", dtm, operation))
|
||
if err != nil {
|
||
return err
|
||
}
|
||
tr := resp.Result().(*TransResult)
|
||
if tr.DtmResult == "FAILURE" {
|
||
return errors.New("FAILURE: " + tr.Message)
|
||
}
|
||
return nil
|
||
}
|
||
|
||
func callDtmSimple(dtm string, body interface{}, operation string) error {
|
||
return CallDtm(dtm, body, operation, &TransOptions{})
|
||
}
|
||
|
||
// ErrFailure 表示返回失败，要求回滚
|
||
var ErrFailure = errors.New("transaction FAILURE")
|
||
|
||
// ResultSuccess 表示返回成功，可以进行下一步
|
||
var ResultSuccess = common.M{"dtm_result": "SUCCESS"}
|
||
|
||
// ResultFailure 表示返回失败，要求回滚
|
||
var ResultFailure = common.M{"dtm_result": "FAILURE"}
|