mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
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61 lines
1.7 KiB
Go
61 lines
1.7 KiB
Go
/*
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*
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* Copyright 2021 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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// Package admin contains internal implementation for admin service.
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package admin
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import "google.golang.org/grpc"
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// services is a map from name to service register functions.
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var services []func(grpc.ServiceRegistrar) (func(), error)
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// AddService adds a service to the list of admin services.
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//
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// NOTE: this function must only be called during initialization time (i.e. in
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// an init() function), and is not thread-safe.
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//
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// If multiple services with the same service name are added (e.g. two services
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// for `grpc.channelz.v1.Channelz`), the server will panic on `Register()`.
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func AddService(f func(grpc.ServiceRegistrar) (func(), error)) {
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services = append(services, f)
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}
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// Register registers the set of admin services to the given server.
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func Register(s grpc.ServiceRegistrar) (cleanup func(), _ error) {
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var cleanups []func()
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for _, f := range services {
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cleanup, err := f(s)
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if err != nil {
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callFuncs(cleanups)
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return nil, err
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}
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if cleanup != nil {
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cleanups = append(cleanups, cleanup)
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}
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}
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return func() {
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callFuncs(cleanups)
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}, nil
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}
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func callFuncs(fs []func()) {
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for _, f := range fs {
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f()
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}
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}
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