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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 v3client
import (
"context"
"time"
"go.etcd.io/etcd/client/v3"
"go.etcd.io/etcd/server/v3/etcdserver"
"go.etcd.io/etcd/server/v3/etcdserver/api/v3rpc"
"go.etcd.io/etcd/server/v3/proxy/grpcproxy/adapter"
)
// New creates a clientv3 client that wraps an in-process EtcdServer. Instead
// of making gRPC calls through sockets, the client makes direct function calls
// to the etcd server through its api/v3rpc function interfaces.
func New(s *etcdserver.EtcdServer) *clientv3.Client {
c := clientv3.NewCtxClient(context.Background(), clientv3.WithZapLogger(s.Logger()))
kvc := adapter.KvServerToKvClient(v3rpc.NewQuotaKVServer(s))
c.KV = clientv3.NewKVFromKVClient(kvc, c)
lc := adapter.LeaseServerToLeaseClient(v3rpc.NewQuotaLeaseServer(s))
c.Lease = clientv3.NewLeaseFromLeaseClient(lc, c, time.Second)
wc := adapter.WatchServerToWatchClient(v3rpc.NewWatchServer(s))
c.Watcher = &watchWrapper{clientv3.NewWatchFromWatchClient(wc, c)}
mc := adapter.MaintenanceServerToMaintenanceClient(v3rpc.NewMaintenanceServer(s, nil))
c.Maintenance = clientv3.NewMaintenanceFromMaintenanceClient(mc, c)
clc := adapter.ClusterServerToClusterClient(v3rpc.NewClusterServer(s))
c.Cluster = clientv3.NewClusterFromClusterClient(clc, c)
a := adapter.AuthServerToAuthClient(v3rpc.NewAuthServer(s))
c.Auth = clientv3.NewAuthFromAuthClient(a, c)
return c
}
// BlankContext implements Stringer on a context so the ctx string doesn't
// depend on the context's WithValue data, which tends to be unsynchronized
// (e.g., x/net/trace), causing ctx.String() to throw data races.
type blankContext struct{ context.Context }
func (*blankContext) String() string { return "(blankCtx)" }
// watchWrapper wraps clientv3 watch calls to blank out the context
// to avoid races on trace data.
type watchWrapper struct{ clientv3.Watcher }
func (ww *watchWrapper) Watch(ctx context.Context, key string, opts ...clientv3.OpOption) clientv3.WatchChan {
return ww.Watcher.Watch(&blankContext{ctx}, key, opts...)
}
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