func (fo *frameOpen) createRollClientTxn() (*msgs.ClientTxn, map[common.VarUUId]*common.Positions) {
var origWrite *msgs.Action
vUUIdBytes := fo.v.UUId[:]
for idx, l := 0, fo.frameTxnActions.Len(); idx < l; idx++ {
action := fo.frameTxnActions.At(idx)
if bytes.Equal(action.VarId(), vUUIdBytes) {
origWrite = &action
break
}
}
seg := capn.NewBuffer(nil)
ctxn := msgs.NewClientTxn(seg)
ctxn.SetRetry(false)
actions := msgs.NewClientActionList(seg, 1)
ctxn.SetActions(actions)
action := actions.At(0)
action.SetVarId(fo.v.UUId[:])
action.SetRoll()
roll := action.Roll()
roll.SetVersion(fo.frameTxnId[:])
var refs msgs.VarIdPos_List
switch origWrite.Which() {
case msgs.ACTION_WRITE:
ow := origWrite.Write()
roll.SetValue(ow.Value())
refs = ow.References()
case msgs.ACTION_READWRITE:
owr := origWrite.Readwrite()
roll.SetValue(owr.Value())
refs = owr.References()
case msgs.ACTION_CREATE:
oc := origWrite.Create()
roll.SetValue(oc.Value())
refs = oc.References()
case msgs.ACTION_ROLL:
owr := origWrite.Roll()
roll.SetValue(owr.Value())
refs = owr.References()
default:
panic(fmt.Sprintf("%v unexpected action type when building roll: %v", fo.frame, origWrite.Which()))
}
posMap := make(map[common.VarUUId]*common.Positions)
posMap[*fo.v.UUId] = fo.v.positions
refVarList := seg.NewDataList(refs.Len())
roll.SetReferences(refVarList)
for idx, l := 0, refs.Len(); idx < l; idx++ {
ref := refs.At(idx)
vUUId := common.MakeVarUUId(ref.Id())
pos := common.Positions(ref.Positions())
posMap[*vUUId] = &pos
refVarList.Set(idx, vUUId[:])
}
return &ctxn, posMap
}
func (sts *SimpleTxnSubmitter) translateRoll(outgoingSeg *capn.Segment, referencesInNeedOfPositions *[]*msgs.VarIdPos, action *msgs.Action, clientAction *msgs.ClientAction) {
action.SetRoll()
clientRoll := clientAction.Roll()
roll := action.Roll()
roll.SetVersion(clientRoll.Version())
roll.SetValue(clientRoll.Value())
clientReferences := clientRoll.References()
references := msgs.NewVarIdPosList(outgoingSeg, clientReferences.Len())
roll.SetReferences(references)
copyReferences(&clientReferences, &references, referencesInNeedOfPositions)
}