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divyadesai19009132020-03-04 12:58:08 +00001// 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 {
25 return &errPicker{p: Error, err: err}
26}
27
28type errPicker struct {
29 p Policy
30 err error
31}
32
33func (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
39}