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Extract Admin Server (yorkie-team#311)
Admin Server needs to be handled by a different auth mechanism. It also has to handle different workloads than RPC. So this commit extract Admin Server from RPC Server.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| /* | ||
| * Copyright 2022 The Yorkie Authors. All rights reserved. | ||
| * | ||
| * 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 | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
| "fmt" | ||
| "net" | ||
|
|
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| "google.golang.org/grpc" | ||
|
|
||
| "github.com/yorkie-team/yorkie/api" | ||
| "github.com/yorkie-team/yorkie/api/converter" | ||
| "github.com/yorkie-team/yorkie/yorkie/backend" | ||
| "github.com/yorkie-team/yorkie/yorkie/backend/db" | ||
| "github.com/yorkie-team/yorkie/yorkie/documents" | ||
| "github.com/yorkie-team/yorkie/yorkie/logging" | ||
| ) | ||
|
|
||
| // ErrInvalidAdminPort occurs when the port in the config is invalid. | ||
| var ErrInvalidAdminPort = errors.New("invalid port number for Admin server") | ||
|
|
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| // Config is the configuration for creating a Server. | ||
| type Config struct { | ||
| Port int `yaml:"Port"` | ||
| } | ||
|
|
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| // Validate validates the port number. | ||
| func (c *Config) Validate() error { | ||
| if c.Port < 1 || 65535 < c.Port { | ||
| return fmt.Errorf("must be between 1 and 65535, given %d: %w", c.Port, ErrInvalidAdminPort) | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
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| // Server is the gRPC server for admin. | ||
| type Server struct { | ||
| conf *Config | ||
| grpcServer *grpc.Server | ||
| backend *backend.Backend | ||
| } | ||
|
|
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| // NewServer creates a new Server. | ||
| func NewServer(conf *Config, be *backend.Backend) *Server { | ||
| grpcServer := grpc.NewServer() | ||
|
|
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| server := &Server{ | ||
| conf: conf, | ||
| backend: be, | ||
| grpcServer: grpcServer, | ||
| } | ||
|
|
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| api.RegisterAdminServer(grpcServer, server) | ||
|
|
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| return server | ||
| } | ||
|
|
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| // Start starts this server by opening the rpc port. | ||
| func (s *Server) Start() error { | ||
| return s.listenAndServeGRPC() | ||
| } | ||
|
|
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| // Shutdown shuts down this server. | ||
| func (s *Server) Shutdown(graceful bool) { | ||
| if graceful { | ||
| s.grpcServer.GracefulStop() | ||
| } else { | ||
| s.grpcServer.Stop() | ||
| } | ||
| } | ||
|
|
||
| // GRPCServer returns the gRPC server. | ||
| func (s *Server) GRPCServer() *grpc.Server { | ||
| return s.grpcServer | ||
| } | ||
|
|
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| func (s *Server) listenAndServeGRPC() error { | ||
| lis, err := net.Listen("tcp", fmt.Sprintf(":%d", s.conf.Port)) | ||
| if err != nil { | ||
| logging.DefaultLogger().Error(err) | ||
| return err | ||
| } | ||
|
|
||
| go func() { | ||
| logging.DefaultLogger().Infof("serving Admin on %d", s.conf.Port) | ||
|
|
||
| if err := s.grpcServer.Serve(lis); err != nil { | ||
| if err != grpc.ErrServerStopped { | ||
| logging.DefaultLogger().Error(err) | ||
| } | ||
| } | ||
| }() | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| // ListDocuments lists documents. | ||
| func (s *Server) ListDocuments( | ||
| ctx context.Context, | ||
| req *api.ListDocumentsRequest, | ||
| ) (*api.ListDocumentsResponse, error) { | ||
| docs, err := documents.ListDocumentSummaries( | ||
| ctx, | ||
| s.backend, | ||
| db.ID(req.PreviousId), | ||
| int(req.PageSize), | ||
| ) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return &api.ListDocumentsResponse{ | ||
| Documents: converter.ToDocumentSummaries(docs), | ||
| }, nil | ||
| } |
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