mirror of https://github.com/grpc/grpc-go.git
61 lines
1.7 KiB
Go
61 lines
1.7 KiB
Go
/*
|
|
*
|
|
* Copyright 2021 gRPC 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 admin contains internal implementation for admin service.
|
|
package admin
|
|
|
|
import "google.golang.org/grpc"
|
|
|
|
// services is a map from name to service register functions.
|
|
var services []func(grpc.ServiceRegistrar) (func(), error)
|
|
|
|
// AddService adds a service to the list of admin services.
|
|
//
|
|
// NOTE: this function must only be called during initialization time (i.e. in
|
|
// an init() function), and is not thread-safe.
|
|
//
|
|
// If multiple services with the same service name are added (e.g. two services
|
|
// for `grpc.channelz.v1.Channelz`), the server will panic on `Register()`.
|
|
func AddService(f func(grpc.ServiceRegistrar) (func(), error)) {
|
|
services = append(services, f)
|
|
}
|
|
|
|
// Register registers the set of admin services to the given server.
|
|
func Register(s grpc.ServiceRegistrar) (cleanup func(), _ error) {
|
|
var cleanups []func()
|
|
for _, f := range services {
|
|
cleanup, err := f(s)
|
|
if err != nil {
|
|
callFuncs(cleanups)
|
|
return nil, err
|
|
}
|
|
if cleanup != nil {
|
|
cleanups = append(cleanups, cleanup)
|
|
}
|
|
}
|
|
return func() {
|
|
callFuncs(cleanups)
|
|
}, nil
|
|
}
|
|
|
|
func callFuncs(fs []func()) {
|
|
for _, f := range fs {
|
|
f()
|
|
}
|
|
}
|