[VOL-2235] Mocks and interfaces for rw-core
This update consists of mocks that are used by the rw-core
during unit testing. It also includes interfaces used for unit
tests.
Change-Id: I20ca1455c358113c3aa897acc6355e0ddbc614b7
diff --git a/vendor/go.etcd.io/etcd/etcdserver/api/v3election/election.go b/vendor/go.etcd.io/etcd/etcdserver/api/v3election/election.go
new file mode 100644
index 0000000..f5a3be3
--- /dev/null
+++ b/vendor/go.etcd.io/etcd/etcdserver/api/v3election/election.go
@@ -0,0 +1,134 @@
+// Copyright 2017 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 v3election
+
+import (
+ "context"
+ "errors"
+
+ "go.etcd.io/etcd/clientv3"
+ "go.etcd.io/etcd/clientv3/concurrency"
+ epb "go.etcd.io/etcd/etcdserver/api/v3election/v3electionpb"
+)
+
+// ErrMissingLeaderKey is returned when election API request
+// is missing the "leader" field.
+var ErrMissingLeaderKey = errors.New(`"leader" field must be provided`)
+
+type electionServer struct {
+ c *clientv3.Client
+}
+
+func NewElectionServer(c *clientv3.Client) epb.ElectionServer {
+ return &electionServer{c}
+}
+
+func (es *electionServer) Campaign(ctx context.Context, req *epb.CampaignRequest) (*epb.CampaignResponse, error) {
+ s, err := es.session(ctx, req.Lease)
+ if err != nil {
+ return nil, err
+ }
+ e := concurrency.NewElection(s, string(req.Name))
+ if err = e.Campaign(ctx, string(req.Value)); err != nil {
+ return nil, err
+ }
+ return &epb.CampaignResponse{
+ Header: e.Header(),
+ Leader: &epb.LeaderKey{
+ Name: req.Name,
+ Key: []byte(e.Key()),
+ Rev: e.Rev(),
+ Lease: int64(s.Lease()),
+ },
+ }, nil
+}
+
+func (es *electionServer) Proclaim(ctx context.Context, req *epb.ProclaimRequest) (*epb.ProclaimResponse, error) {
+ if req.Leader == nil {
+ return nil, ErrMissingLeaderKey
+ }
+ s, err := es.session(ctx, req.Leader.Lease)
+ if err != nil {
+ return nil, err
+ }
+ e := concurrency.ResumeElection(s, string(req.Leader.Name), string(req.Leader.Key), req.Leader.Rev)
+ if err := e.Proclaim(ctx, string(req.Value)); err != nil {
+ return nil, err
+ }
+ return &epb.ProclaimResponse{Header: e.Header()}, nil
+}
+
+func (es *electionServer) Observe(req *epb.LeaderRequest, stream epb.Election_ObserveServer) error {
+ s, err := es.session(stream.Context(), -1)
+ if err != nil {
+ return err
+ }
+ e := concurrency.NewElection(s, string(req.Name))
+ ch := e.Observe(stream.Context())
+ for stream.Context().Err() == nil {
+ select {
+ case <-stream.Context().Done():
+ case resp, ok := <-ch:
+ if !ok {
+ return nil
+ }
+ lresp := &epb.LeaderResponse{Header: resp.Header, Kv: resp.Kvs[0]}
+ if err := stream.Send(lresp); err != nil {
+ return err
+ }
+ }
+ }
+ return stream.Context().Err()
+}
+
+func (es *electionServer) Leader(ctx context.Context, req *epb.LeaderRequest) (*epb.LeaderResponse, error) {
+ s, err := es.session(ctx, -1)
+ if err != nil {
+ return nil, err
+ }
+ l, lerr := concurrency.NewElection(s, string(req.Name)).Leader(ctx)
+ if lerr != nil {
+ return nil, lerr
+ }
+ return &epb.LeaderResponse{Header: l.Header, Kv: l.Kvs[0]}, nil
+}
+
+func (es *electionServer) Resign(ctx context.Context, req *epb.ResignRequest) (*epb.ResignResponse, error) {
+ if req.Leader == nil {
+ return nil, ErrMissingLeaderKey
+ }
+ s, err := es.session(ctx, req.Leader.Lease)
+ if err != nil {
+ return nil, err
+ }
+ e := concurrency.ResumeElection(s, string(req.Leader.Name), string(req.Leader.Key), req.Leader.Rev)
+ if err := e.Resign(ctx); err != nil {
+ return nil, err
+ }
+ return &epb.ResignResponse{Header: e.Header()}, nil
+}
+
+func (es *electionServer) session(ctx context.Context, lease int64) (*concurrency.Session, error) {
+ s, err := concurrency.NewSession(
+ es.c,
+ concurrency.WithLease(clientv3.LeaseID(lease)),
+ concurrency.WithContext(ctx),
+ )
+ if err != nil {
+ return nil, err
+ }
+ s.Orphan()
+ return s, nil
+}