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// 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 v3lock
import (
"context"
"go.etcd.io/etcd/client/v3"
"go.etcd.io/etcd/client/v3/concurrency"
"go.etcd.io/etcd/server/v3/etcdserver/api/v3lock/v3lockpb"
)
type lockServer struct {
c *clientv3.Client
}
func NewLockServer(c *clientv3.Client) v3lockpb.LockServer {
return &lockServer{c}
}
func (ls *lockServer) Lock(ctx context.Context, req *v3lockpb.LockRequest) (*v3lockpb.LockResponse, error) {
s, err := concurrency.NewSession(
ls.c,
concurrency.WithLease(clientv3.LeaseID(req.Lease)),
concurrency.WithContext(ctx),
)
if err != nil {
return nil, err
}
s.Orphan()
m := concurrency.NewMutex(s, string(req.Name))
if err = m.Lock(ctx); err != nil {
return nil, err
}
return &v3lockpb.LockResponse{Header: m.Header(), Key: []byte(m.Key())}, nil
}
func (ls *lockServer) Unlock(ctx context.Context, req *v3lockpb.UnlockRequest) (*v3lockpb.UnlockResponse, error) {
resp, err := ls.c.Delete(ctx, string(req.Key))
if err != nil {
return nil, err
}
return &v3lockpb.UnlockResponse{Header: resp.Header}, nil
}
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