func (a *applierV2store) Put(r *pb.Request) Response {
ttlOptions := toTTLOptions(r)
exists, existsSet := pbutil.GetBool(r.PrevExist)
switch {
case existsSet:
if exists {
if r.PrevIndex == 0 && r.PrevValue == "" {
return toResponse(a.s.store.Update(r.Path, r.Val, ttlOptions))
} else {
return toResponse(a.s.store.CompareAndSwap(r.Path, r.PrevValue, r.PrevIndex, r.Val, ttlOptions))
}
}
return toResponse(a.s.store.Create(r.Path, r.Dir, r.Val, false, ttlOptions))
case r.PrevIndex > 0 || r.PrevValue != "":
return toResponse(a.s.store.CompareAndSwap(r.Path, r.PrevValue, r.PrevIndex, r.Val, ttlOptions))
default:
if storeMemberAttributeRegexp.MatchString(r.Path) {
id := membership.MustParseMemberIDFromKey(path.Dir(r.Path))
var attr membership.Attributes
if err := json.Unmarshal([]byte(r.Val), &attr); err != nil {
plog.Panicf("unmarshal %s should never fail: %v", r.Val, err)
}
a.s.cluster.UpdateAttributes(id, attr)
// return an empty response since there is no consumer.
return Response{}
}
if r.Path == membership.StoreClusterVersionKey() {
a.s.cluster.SetVersion(semver.Must(semver.NewVersion(r.Val)))
// return an empty response since there is no consumer.
return Response{}
}
return toResponse(a.s.store.Set(r.Path, r.Dir, r.Val, ttlOptions))
}
}
func (s *EtcdServer) updateClusterVersion(ver string) {
if s.cluster.Version() == nil {
plog.Infof("setting up the initial cluster version to %s", version.Cluster(ver))
} else {
plog.Infof("updating the cluster version from %s to %s", version.Cluster(s.cluster.Version().String()), version.Cluster(ver))
}
req := pb.Request{
Method: "PUT",
Path: membership.StoreClusterVersionKey(),
Val: ver,
}
ctx, cancel := context.WithTimeout(context.Background(), s.Cfg.ReqTimeout())
_, err := s.Do(ctx, req)
cancel()
switch err {
case nil:
return
case ErrStopped:
plog.Infof("aborting update cluster version because server is stopped")
return
default:
plog.Errorf("error updating cluster version (%v)", err)
}
}
// applyRequest interprets r as a call to store.X and returns a Response interpreted
// from store.Event
func (s *EtcdServer) applyRequest(r pb.Request) Response {
f := func(ev *store.Event, err error) Response {
return Response{Event: ev, err: err}
}
refresh, _ := pbutil.GetBool(r.Refresh)
ttlOptions := store.TTLOptionSet{Refresh: refresh}
if r.Expiration != 0 {
ttlOptions.ExpireTime = time.Unix(0, r.Expiration)
}
switch r.Method {
case "POST":
return f(s.store.Create(r.Path, r.Dir, r.Val, true, ttlOptions))
case "PUT":
exists, existsSet := pbutil.GetBool(r.PrevExist)
switch {
case existsSet:
if exists {
if r.PrevIndex == 0 && r.PrevValue == "" {
return f(s.store.Update(r.Path, r.Val, ttlOptions))
} else {
return f(s.store.CompareAndSwap(r.Path, r.PrevValue, r.PrevIndex, r.Val, ttlOptions))
}
}
return f(s.store.Create(r.Path, r.Dir, r.Val, false, ttlOptions))
case r.PrevIndex > 0 || r.PrevValue != "":
return f(s.store.CompareAndSwap(r.Path, r.PrevValue, r.PrevIndex, r.Val, ttlOptions))
default:
if storeMemberAttributeRegexp.MatchString(r.Path) {
id := membership.MustParseMemberIDFromKey(path.Dir(r.Path))
var attr membership.Attributes
if err := json.Unmarshal([]byte(r.Val), &attr); err != nil {
plog.Panicf("unmarshal %s should never fail: %v", r.Val, err)
}
s.cluster.UpdateAttributes(id, attr)
// return an empty response since there is no consumer.
return Response{}
}
if r.Path == membership.StoreClusterVersionKey() {
s.cluster.SetVersion(semver.Must(semver.NewVersion(r.Val)))
// return an empty response since there is no consumer.
return Response{}
}
return f(s.store.Set(r.Path, r.Dir, r.Val, ttlOptions))
}
case "DELETE":
switch {
case r.PrevIndex > 0 || r.PrevValue != "":
return f(s.store.CompareAndDelete(r.Path, r.PrevValue, r.PrevIndex))
default:
return f(s.store.Delete(r.Path, r.Dir, r.Recursive))
}
case "QGET":
return f(s.store.Get(r.Path, r.Recursive, r.Sorted))
case "SYNC":
s.store.DeleteExpiredKeys(time.Unix(0, r.Time))
return Response{}
default:
// This should never be reached, but just in case:
return Response{err: ErrUnknownMethod}
}
}