[VOL-4291] Rw-core updates for gRPC migration
Change-Id: I8d5a554409115b29318089671ca4e1ab3fa98810
diff --git a/vendor/github.com/coreos/etcd/etcdserver/api/v3rpc/lease.go b/vendor/github.com/coreos/etcd/etcdserver/api/v3rpc/lease.go
new file mode 100644
index 0000000..5b4f2b1
--- /dev/null
+++ b/vendor/github.com/coreos/etcd/etcdserver/api/v3rpc/lease.go
@@ -0,0 +1,148 @@
+// 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 v3rpc
+
+import (
+ "context"
+ "io"
+
+ "github.com/coreos/etcd/etcdserver"
+ "github.com/coreos/etcd/etcdserver/api/v3rpc/rpctypes"
+ pb "github.com/coreos/etcd/etcdserver/etcdserverpb"
+ "github.com/coreos/etcd/lease"
+)
+
+type LeaseServer struct {
+ hdr header
+ le etcdserver.Lessor
+}
+
+func NewLeaseServer(s *etcdserver.EtcdServer) pb.LeaseServer {
+ return &LeaseServer{le: s, hdr: newHeader(s)}
+}
+
+func (ls *LeaseServer) LeaseGrant(ctx context.Context, cr *pb.LeaseGrantRequest) (*pb.LeaseGrantResponse, error) {
+ resp, err := ls.le.LeaseGrant(ctx, cr)
+
+ if err != nil {
+ return nil, togRPCError(err)
+ }
+ ls.hdr.fill(resp.Header)
+ return resp, nil
+}
+
+func (ls *LeaseServer) LeaseRevoke(ctx context.Context, rr *pb.LeaseRevokeRequest) (*pb.LeaseRevokeResponse, error) {
+ resp, err := ls.le.LeaseRevoke(ctx, rr)
+ if err != nil {
+ return nil, togRPCError(err)
+ }
+ ls.hdr.fill(resp.Header)
+ return resp, nil
+}
+
+func (ls *LeaseServer) LeaseTimeToLive(ctx context.Context, rr *pb.LeaseTimeToLiveRequest) (*pb.LeaseTimeToLiveResponse, error) {
+ resp, err := ls.le.LeaseTimeToLive(ctx, rr)
+ if err != nil && err != lease.ErrLeaseNotFound {
+ return nil, togRPCError(err)
+ }
+ if err == lease.ErrLeaseNotFound {
+ resp = &pb.LeaseTimeToLiveResponse{
+ Header: &pb.ResponseHeader{},
+ ID: rr.ID,
+ TTL: -1,
+ }
+ }
+ ls.hdr.fill(resp.Header)
+ return resp, nil
+}
+
+func (ls *LeaseServer) LeaseLeases(ctx context.Context, rr *pb.LeaseLeasesRequest) (*pb.LeaseLeasesResponse, error) {
+ resp, err := ls.le.LeaseLeases(ctx, rr)
+ if err != nil && err != lease.ErrLeaseNotFound {
+ return nil, togRPCError(err)
+ }
+ if err == lease.ErrLeaseNotFound {
+ resp = &pb.LeaseLeasesResponse{
+ Header: &pb.ResponseHeader{},
+ Leases: []*pb.LeaseStatus{},
+ }
+ }
+ ls.hdr.fill(resp.Header)
+ return resp, nil
+}
+
+func (ls *LeaseServer) LeaseKeepAlive(stream pb.Lease_LeaseKeepAliveServer) (err error) {
+ errc := make(chan error, 1)
+ go func() {
+ errc <- ls.leaseKeepAlive(stream)
+ }()
+ select {
+ case err = <-errc:
+ case <-stream.Context().Done():
+ // the only server-side cancellation is noleader for now.
+ err = stream.Context().Err()
+ if err == context.Canceled {
+ err = rpctypes.ErrGRPCNoLeader
+ }
+ }
+ return err
+}
+
+func (ls *LeaseServer) leaseKeepAlive(stream pb.Lease_LeaseKeepAliveServer) error {
+ for {
+ req, err := stream.Recv()
+ if err == io.EOF {
+ return nil
+ }
+ if err != nil {
+ if isClientCtxErr(stream.Context().Err(), err) {
+ plog.Debugf("failed to receive lease keepalive request from gRPC stream (%q)", err.Error())
+ } else {
+ plog.Warningf("failed to receive lease keepalive request from gRPC stream (%q)", err.Error())
+ }
+ return err
+ }
+
+ // Create header before we sent out the renew request.
+ // This can make sure that the revision is strictly smaller or equal to
+ // when the keepalive happened at the local server (when the local server is the leader)
+ // or remote leader.
+ // Without this, a lease might be revoked at rev 3 but client can see the keepalive succeeded
+ // at rev 4.
+ resp := &pb.LeaseKeepAliveResponse{ID: req.ID, Header: &pb.ResponseHeader{}}
+ ls.hdr.fill(resp.Header)
+
+ ttl, err := ls.le.LeaseRenew(stream.Context(), lease.LeaseID(req.ID))
+ if err == lease.ErrLeaseNotFound {
+ err = nil
+ ttl = 0
+ }
+
+ if err != nil {
+ return togRPCError(err)
+ }
+
+ resp.TTL = ttl
+ err = stream.Send(resp)
+ if err != nil {
+ if isClientCtxErr(stream.Context().Err(), err) {
+ plog.Debugf("failed to send lease keepalive response to gRPC stream (%q)", err.Error())
+ } else {
+ plog.Warningf("failed to send lease keepalive response to gRPC stream (%q)", err.Error())
+ }
+ return err
+ }
+ }
+}