93 lines
2.4 KiB
Go
93 lines
2.4 KiB
Go
// Copyright 2016 CoreOS, Inc.
|
|
//
|
|
// 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 (
|
|
"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"
|
|
"golang.org/x/net/context"
|
|
)
|
|
|
|
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 == lease.ErrLeaseExists {
|
|
return nil, rpctypes.ErrGRPCLeaseExist
|
|
}
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
ls.hdr.fill(resp.Header)
|
|
return resp, err
|
|
}
|
|
|
|
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, rpctypes.ErrGRPCLeaseNotFound
|
|
}
|
|
ls.hdr.fill(resp.Header)
|
|
return resp, nil
|
|
}
|
|
|
|
func (ls *LeaseServer) LeaseKeepAlive(stream pb.Lease_LeaseKeepAliveServer) error {
|
|
for {
|
|
req, err := stream.Recv()
|
|
if err == io.EOF {
|
|
return nil
|
|
}
|
|
if err != nil {
|
|
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(lease.LeaseID(req.ID))
|
|
if err == lease.ErrLeaseNotFound {
|
|
err = nil
|
|
ttl = 0
|
|
}
|
|
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
resp.TTL = ttl
|
|
err = stream.Send(resp)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
}
|