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流小强 / clientv3

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watch_client_adapter.go 1.86 KB
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流小强 提交于 2020-03-22 17:56 . etcdv3
// 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 adapter
import (
"context"
"errors"
pb "go.etcd.io/etcd/etcdserver/etcdserverpb"
"google.golang.org/grpc"
)
var errAlreadySentHeader = errors.New("adapter: already sent header")
type ws2wc struct{ wserv pb.WatchServer }
func WatchServerToWatchClient(wserv pb.WatchServer) pb.WatchClient {
return &ws2wc{wserv}
}
func (s *ws2wc) Watch(ctx context.Context, opts ...grpc.CallOption) (pb.Watch_WatchClient, error) {
cs := newPipeStream(ctx, func(ss chanServerStream) error {
return s.wserv.Watch(&ws2wcServerStream{ss})
})
return &ws2wcClientStream{cs}, nil
}
// ws2wcClientStream implements Watch_WatchClient
type ws2wcClientStream struct{ chanClientStream }
// ws2wcServerStream implements Watch_WatchServer
type ws2wcServerStream struct{ chanServerStream }
func (s *ws2wcClientStream) Send(wr *pb.WatchRequest) error {
return s.SendMsg(wr)
}
func (s *ws2wcClientStream) Recv() (*pb.WatchResponse, error) {
var v interface{}
if err := s.RecvMsg(&v); err != nil {
return nil, err
}
return v.(*pb.WatchResponse), nil
}
func (s *ws2wcServerStream) Send(wr *pb.WatchResponse) error {
return s.SendMsg(wr)
}
func (s *ws2wcServerStream) Recv() (*pb.WatchRequest, error) {
var v interface{}
if err := s.RecvMsg(&v); err != nil {
return nil, err
}
return v.(*pb.WatchRequest), nil
}
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