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watcher.go
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/
watcher.go
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// Copyright 2016 The etcd Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package grpcproxy
import (
"github.com/coreos/etcd/clientv3"
pb "github.com/coreos/etcd/etcdserver/etcdserverpb"
"github.com/coreos/etcd/mvcc/mvccpb"
)
type watchRange struct {
key, end string
}
type watcher struct {
id int64
wr watchRange
// TODO: support filter
progress bool
ch chan<- *pb.WatchResponse
}
func (w *watcher) send(wr clientv3.WatchResponse) {
if wr.IsProgressNotify() && !w.progress {
return
}
// todo: filter out the events that this watcher already seen.
evs := wr.Events
events := make([]*mvccpb.Event, len(evs))
for i := range evs {
events[i] = (*mvccpb.Event)(evs[i])
}
pbwr := &pb.WatchResponse{
Header: &wr.Header,
WatchId: w.id,
Events: events,
}
select {
case w.ch <- pbwr:
default:
panic("handle this")
}
}