Matteo Scandolo | a6a3aee | 2019-11-26 13:30:14 -0700 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * Copyright 2017 gRPC authors. |
| 4 | * |
| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | * you may not use this file except in compliance with the License. |
| 7 | * You may obtain a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
| 16 | * |
| 17 | */ |
| 18 | |
| 19 | // Package passthrough implements a pass-through resolver. It sends the target |
| 20 | // name without scheme back to gRPC as resolved address. |
| 21 | package passthrough |
| 22 | |
| 23 | import "google.golang.org/grpc/resolver" |
| 24 | |
| 25 | const scheme = "passthrough" |
| 26 | |
| 27 | type passthroughBuilder struct{} |
| 28 | |
David K. Bainbridge | c415efe | 2021-08-19 13:05:21 +0000 | [diff] [blame] | 29 | func (*passthroughBuilder) Build(target resolver.Target, cc resolver.ClientConn, opts resolver.BuildOption) (resolver.Resolver, error) { |
Matteo Scandolo | a6a3aee | 2019-11-26 13:30:14 -0700 | [diff] [blame] | 30 | r := &passthroughResolver{ |
| 31 | target: target, |
| 32 | cc: cc, |
| 33 | } |
| 34 | r.start() |
| 35 | return r, nil |
| 36 | } |
| 37 | |
| 38 | func (*passthroughBuilder) Scheme() string { |
| 39 | return scheme |
| 40 | } |
| 41 | |
| 42 | type passthroughResolver struct { |
| 43 | target resolver.Target |
| 44 | cc resolver.ClientConn |
| 45 | } |
| 46 | |
| 47 | func (r *passthroughResolver) start() { |
| 48 | r.cc.UpdateState(resolver.State{Addresses: []resolver.Address{{Addr: r.target.Endpoint}}}) |
| 49 | } |
| 50 | |
David K. Bainbridge | c415efe | 2021-08-19 13:05:21 +0000 | [diff] [blame] | 51 | func (*passthroughResolver) ResolveNow(o resolver.ResolveNowOption) {} |
Matteo Scandolo | a6a3aee | 2019-11-26 13:30:14 -0700 | [diff] [blame] | 52 | |
| 53 | func (*passthroughResolver) Close() {} |
| 54 | |
| 55 | func init() { |
| 56 | resolver.Register(&passthroughBuilder{}) |
| 57 | } |