election.go

Documentation: go.etcd.io/etcd/server/v3/proxy/grpcproxy

     1  // Copyright 2017 The etcd Lockors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package grpcproxy
    16  
    17  import (
    18  	"context"
    19  
    20  	"go.etcd.io/etcd/client/v3"
    21  	"go.etcd.io/etcd/server/v3/etcdserver/api/v3election/v3electionpb"
    22  )
    23  
    24  type electionProxy struct {
    25  	client *clientv3.Client
    26  }
    27  
    28  func NewElectionProxy(client *clientv3.Client) v3electionpb.ElectionServer {
    29  	return &electionProxy{client: client}
    30  }
    31  
    32  func (ep *electionProxy) Campaign(ctx context.Context, req *v3electionpb.CampaignRequest) (*v3electionpb.CampaignResponse, error) {
    33  	return v3electionpb.NewElectionClient(ep.client.ActiveConnection()).Campaign(ctx, req)
    34  }
    35  
    36  func (ep *electionProxy) Proclaim(ctx context.Context, req *v3electionpb.ProclaimRequest) (*v3electionpb.ProclaimResponse, error) {
    37  	return v3electionpb.NewElectionClient(ep.client.ActiveConnection()).Proclaim(ctx, req)
    38  }
    39  
    40  func (ep *electionProxy) Leader(ctx context.Context, req *v3electionpb.LeaderRequest) (*v3electionpb.LeaderResponse, error) {
    41  	return v3electionpb.NewElectionClient(ep.client.ActiveConnection()).Leader(ctx, req)
    42  }
    43  
    44  func (ep *electionProxy) Observe(req *v3electionpb.LeaderRequest, s v3electionpb.Election_ObserveServer) error {
    45  	conn := ep.client.ActiveConnection()
    46  	ctx, cancel := context.WithCancel(s.Context())
    47  	defer cancel()
    48  	sc, err := v3electionpb.NewElectionClient(conn).Observe(ctx, req)
    49  	if err != nil {
    50  		return err
    51  	}
    52  	for {
    53  		rr, err := sc.Recv()
    54  		if err != nil {
    55  			return err
    56  		}
    57  		if err = s.Send(rr); err != nil {
    58  			return err
    59  		}
    60  	}
    61  }
    62  
    63  func (ep *electionProxy) Resign(ctx context.Context, req *v3electionpb.ResignRequest) (*v3electionpb.ResignResponse, error) {
    64  	return v3electionpb.NewElectionClient(ep.client.ActiveConnection()).Resign(ctx, req)
    65  }
    66
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