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/*
*
* 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
}
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