84 lines
1.7 KiB
Go
84 lines
1.7 KiB
Go
// Copyright 2016 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package grpcproxy
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import (
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"github.com/coreos/etcd/clientv3"
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pb "github.com/coreos/etcd/etcdserver/etcdserverpb"
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"github.com/coreos/etcd/mvcc"
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"github.com/coreos/etcd/mvcc/mvccpb"
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)
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type watchRange struct {
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key, end string
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}
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type watcher struct {
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id int64
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wr watchRange
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rev int64
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filters []mvcc.FilterFunc
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progress bool
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ch chan<- *pb.WatchResponse
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}
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func (w *watcher) send(wr clientv3.WatchResponse) {
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if wr.IsProgressNotify() && !w.progress {
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return
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}
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events := make([]*mvccpb.Event, 0, len(wr.Events))
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for i := range wr.Events {
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ev := (*mvccpb.Event)(wr.Events[i])
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if ev.Kv.ModRevision <= w.rev {
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continue
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} else {
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w.rev = ev.Kv.ModRevision
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}
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filtered := false
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if len(w.filters) != 0 {
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for _, filter := range w.filters {
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if filter(*ev) {
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filtered = true
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break
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}
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}
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}
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if !filtered {
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events = append(events, ev)
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}
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}
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// all events are filtered out?
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if !wr.IsProgressNotify() && len(events) == 0 {
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return
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}
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pbwr := &pb.WatchResponse{
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Header: &wr.Header,
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WatchId: w.id,
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Events: events,
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}
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select {
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case w.ch <- pbwr:
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default:
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panic("handle this")
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}
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}
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