// ExecSub executes a sub-transaction for given subTxID(which define in SEC initialize) and arguments.
// it returns current Saga.
func (s *Saga) ExecSub(subTxID string, args ...interface{}) *Saga {
subTxDef := s.sec.MustFindSubTxDef(subTxID)
log := &Log{
Type: ActionStart,
SubTxID: subTxID,
Time: time.Now(),
Params: MarshalParam(s.sec, args),
}
err := LogStorage().AppendLog(s.logID, log.mustMarshal())
if err != nil {
panic("Add log Failure")
}
params := make([]reflect.Value, 0, len(args)+1)
params = append(params, reflect.ValueOf(s.context))
for _, arg := range args {
params = append(params, reflect.ValueOf(arg))
}
result := subTxDef.action.Call(params)
if isReturnError(result) {
s.Abort()
return s
}
log = &Log{
Type: ActionEnd,
SubTxID: subTxID,
Time: time.Now(),
}
err = LogStorage().AppendLog(s.logID, log.mustMarshal())
if err != nil {
panic("Add log Failure")
}
return s
}
func (s *Saga) startSaga() {
log := &Log{
Type: SagaStart,
Time: time.Now(),
}
err := LogStorage().AppendLog(s.logID, log.mustMarshal())
if err != nil {
panic("Add log Failure")
}
}
// EndSaga finishes a Saga's execution.
func (s *Saga) EndSaga() {
log := &Log{
Type: SagaEnd,
Time: time.Now(),
}
err := LogStorage().AppendLog(s.logID, log.mustMarshal())
if err != nil {
panic("Add log Failure")
}
err = LogStorage().Cleanup(s.logID)
if err != nil {
panic("Clean up topic failure")
}
}