func (wps *watchProxyStream) recvLoop() error {
for {
req, err := wps.stream.Recv()
if err != nil {
return err
}
switch uv := req.RequestUnion.(type) {
case *pb.WatchRequest_CreateRequest:
cr := uv.CreateRequest
w := &watcher{
wr: watchRange{string(cr.Key), string(cr.RangeEnd)},
id: wps.nextWatcherID,
wps: wps,
nextrev: cr.StartRevision,
progress: cr.ProgressNotify,
prevKV: cr.PrevKv,
filters: v3rpc.FiltersFromRequest(cr),
}
if !w.wr.valid() {
w.post(&pb.WatchResponse{WatchId: -1, Created: true, Canceled: true})
continue
}
wps.nextWatcherID++
w.nextrev = cr.StartRevision
wps.watchers[w.id] = w
wps.ranges.add(w)
case *pb.WatchRequest_CancelRequest:
wps.delete(uv.CancelRequest.WatchId)
default:
panic("not implemented")
}
}
}
func (sws *serverWatchStream) recvLoop() error {
defer sws.close()
for {
req, err := sws.gRPCStream.Recv()
if err == io.EOF {
return nil
}
if err != nil {
return err
}
switch uv := req.RequestUnion.(type) {
case *pb.WatchRequest_CreateRequest:
cr := uv.CreateRequest
watcher := watcher{
wr: watchRange{
key: string(cr.Key),
end: string(cr.RangeEnd),
},
id: sws.nextWatcherID,
ch: sws.watchCh,
progress: cr.ProgressNotify,
filters: v3rpc.FiltersFromRequest(cr),
}
if cr.StartRevision != 0 {
sws.addDedicatedWatcher(watcher, cr.StartRevision)
} else {
sws.addCoalescedWatcher(watcher)
}
wresp := &pb.WatchResponse{
Header: &pb.ResponseHeader{}, // TODO: fill in header
WatchId: sws.nextWatcherID,
Created: true,
}
sws.nextWatcherID++
select {
case sws.ctrlCh <- wresp:
default:
panic("handle this")
}
case *pb.WatchRequest_CancelRequest:
sws.removeWatcher(uv.CancelRequest.WatchId)
default:
panic("not implemented")
}
}
}