Merge pull request #4325 from xiang90/client_lease

clientv3: lease initial api

clientv3/lease.go

@@ -0,0 +1,42 @@
+// 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 clientv3
+
+import (
+	"github.com/coreos/etcd/Godeps/_workspace/src/golang.org/x/net/context"
+	pb "github.com/coreos/etcd/etcdserver/etcdserverpb"
+	"github.com/coreos/etcd/lease"
+)
+
+type (
+	LeaseCreateResponse    pb.LeaseCreateResponse
+	LeaseRevokeResponse    pb.LeaseRevokeResponse
+	LeaseKeepAliveResponse pb.LeaseKeepAliveResponse
+)
+
+type Lease interface {
+	// Create creates a new lease.
+	Create(ctx context.Context, ttl int64) *LeaseCreateResponse
+
+	// Revoke revokes the given lease.
+	Revoke(ctx context.Context, id lease.LeaseID) *LeaseRevokeResponse
+
+	// KeepAlive keeps the given lease alive forever.
+	KeepAlive(ctx context.Context, id lease.LeaseID) (chan<- *LeaseKeepAliveResponse, error)
+
+	// KeepAliveOnce renews the lease once. In most of the cases, Keepalive
+	// should be used instead of KeepAliveOnce.
+	KeepAliveOnce(ctx context.Context, id lease.LeaseID) (*LeaseKeepAliveResponse, error)
+}