blob: 9e043789c8df7859025733ae239770aee7d3fa0b [file] [log] [blame]
William Kurkianea869482019-04-09 15:16:11 -04001// Copyright 2018 The etcd Authors
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15package picker
16
17import (
18 "context"
19
20 "google.golang.org/grpc/balancer"
21)
22
23// NewErr returns a picker that always returns err on "Pick".
24func NewErr(err error) Picker {
David Bainbridge788e5202019-10-21 18:49:40 +000025 return &errPicker{p: Error, err: err}
William Kurkianea869482019-04-09 15:16:11 -040026}
27
28type errPicker struct {
David Bainbridge788e5202019-10-21 18:49:40 +000029 p Policy
William Kurkianea869482019-04-09 15:16:11 -040030 err error
31}
32
David Bainbridge788e5202019-10-21 18:49:40 +000033func (ep *errPicker) String() string {
34 return ep.p.String()
35}
36
37func (ep *errPicker) Pick(context.Context, balancer.PickOptions) (balancer.SubConn, func(balancer.DoneInfo), error) {
38 return nil, nil, ep.err
William Kurkianea869482019-04-09 15:16:11 -040039}