| /* |
| * |
| * Copyright 2019 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 main |
| |
| import ( |
| "encoding/gob" |
| "fmt" |
| "os" |
| |
| "google.golang.org/grpc/grpclog" |
| ) |
| |
| func loadSnapshot(snapshotFileName string) (*snapshot, error) { |
| grpclog.Infof("opening snapshot file %s", snapshotFileName) |
| snapshotFile, err := os.Open(snapshotFileName) |
| if err != nil { |
| grpclog.Errorf("cannot open %s: %v", snapshotFileName, err) |
| return nil, err |
| } |
| defer snapshotFile.Close() |
| |
| grpclog.Infof("decoding snapshot file %s", snapshotFileName) |
| s := &snapshot{} |
| decoder := gob.NewDecoder(snapshotFile) |
| if err = decoder.Decode(s); err != nil { |
| grpclog.Errorf("cannot decode %s: %v", snapshotFileName, err) |
| return nil, err |
| } |
| |
| return s, nil |
| } |
| |
| func localCommand() error { |
| if *flagSnapshot == "" { |
| return fmt.Errorf("-snapshot flag missing") |
| } |
| |
| s, err := loadSnapshot(*flagSnapshot) |
| if err != nil { |
| return err |
| } |
| |
| if *flagStreamStatsCatapultJSON == "" { |
| return fmt.Errorf("snapshot file specified without an action to perform") |
| } |
| |
| if *flagStreamStatsCatapultJSON != "" { |
| if err = streamStatsCatapultJSON(s, *flagStreamStatsCatapultJSON); err != nil { |
| return err |
| } |
| } |
| |
| return nil |
| } |