// Interface towards the Grapher
func (self *latestTransformer) TransformClientMutation(mutation grapher.MutationNode, concurrent <-chan grapher.MutationNode) (err os.Error) {
mut, e := decodeGenericMutation(mutation)
if e != nil {
log.Printf("Err: Decoding")
return e
}
// If any of these is later, then the mutation is transformed into the epsilon operation
for m := range concurrent {
if m.Time() > mut.Time {
mutation.SetOperation([]byte("null"))
return
}
}
return
}
// Interface towards the Grapher
func (self *latestTransformer) TransformMutation(mutation grapher.MutationNode, rollback <-chan grapher.MutationNode, concurrent []string) (err os.Error) {
mut, e := decodeGenericMutation(mutation)
if e != nil {
return e
}
// Get a list of all concurrent mutations
conc := make(map[string]bool)
for _, id := range concurrent {
conc[id] = true
}
for m := range rollback {
// Skip those which are not concurrent
if _, ok := conc[m.BlobRef()]; !ok {
continue
}
if m.Time() > mut.Time {
mutation.SetOperation([]byte("null"))
return
}
}
return
}
