| /* |
| * |
| * 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 ( |
| "flag" |
| "fmt" |
| ) |
| |
| var flagAddress = flag.String("address", "", "address of a remote gRPC server with profiling turned on to retrieve stats from") |
| var flagTimeout = flag.Int("timeout", 0, "network operations timeout in seconds to remote target (0 indicates unlimited)") |
| |
| var flagRetrieveSnapshot = flag.Bool("retrieve-snapshot", false, "connect to remote target and retrieve a profiling snapshot locally for processing") |
| var flagSnapshot = flag.String("snapshot", "", "snapshot file to write to when retrieving profiling data or snapshot file to read from when processing profiling data") |
| |
| var flagEnableProfiling = flag.Bool("enable-profiling", false, "enable profiling in remote target") |
| var flagDisableProfiling = flag.Bool("disable-profiling", false, "disable profiling in remote target") |
| |
| var flagStreamStatsCatapultJSON = flag.String("stream-stats-catapult-json", "", "path to a file to write to after transforming a snapshot into catapult's JSON format") |
| var flagStreamStatsFilter = flag.String("stream-stats-filter", "server,client", "comma-separated list of stat tags to filter for") |
| |
| func exactlyOneOf(opts ...bool) bool { |
| first := true |
| for _, o := range opts { |
| if !o { |
| continue |
| } |
| |
| if first { |
| first = false |
| } else { |
| return false |
| } |
| } |
| |
| return !first |
| } |
| |
| func parseArgs() error { |
| flag.Parse() |
| |
| if *flagAddress != "" { |
| if !exactlyOneOf(*flagEnableProfiling, *flagDisableProfiling, *flagRetrieveSnapshot) { |
| return fmt.Errorf("when -address is specified, you must include exactly only one of -enable-profiling, -disable-profiling, and -retrieve-snapshot") |
| } |
| |
| if *flagStreamStatsCatapultJSON != "" { |
| return fmt.Errorf("when -address is specified, you must not include -stream-stats-catapult-json") |
| } |
| } else { |
| if *flagEnableProfiling || *flagDisableProfiling || *flagRetrieveSnapshot { |
| return fmt.Errorf("when -address isn't specified, you must not include any of -enable-profiling, -disable-profiling, and -retrieve-snapshot") |
| } |
| |
| if *flagStreamStatsCatapultJSON == "" { |
| return fmt.Errorf("when -address isn't specified, you must include -stream-stats-catapult-json") |
| } |
| } |
| |
| return nil |
| } |