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// Copyright (c) 2018 Cisco and/or its affiliates.
//
// 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"
"log"
"os"
"strings"
"git.fd.io/govpp.git/adapter"
"git.fd.io/govpp.git/adapter/vppapiclient"
)
// ------------------------------------------------------------------
// Example - Stats API
// ------------------------------------------------------------------
// The example stats_api demonstrates how to retrieve stats
// from the VPP using the new stats API.
// ------------------------------------------------------------------
var (
statsSocket = flag.String("socket", vppapiclient.DefaultStatSocket, "VPP stats segment socket")
dumpAll = flag.Bool("all", false, "Dump all stats including ones with zero values")
)
func init() {
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "%s: usage [ls|dump] <patterns>...\n", os.Args[0])
flag.PrintDefaults()
os.Exit(1)
}
}
func main() {
flag.Parse()
cmd := flag.Arg(0)
switch cmd {
case "", "ls", "dump":
default:
flag.Usage()
}
var patterns []string
if flag.NArg() > 0 {
patterns = flag.Args()[1:]
}
client := vppapiclient.NewStatClient(*statsSocket)
fmt.Printf("Connecting to stats socket: %s\n", *statsSocket)
if err := client.Connect(); err != nil {
log.Fatalln("Connecting failed:", err)
}
defer client.Disconnect()
switch cmd {
case "dump":
dumpStats(client, patterns, !*dumpAll)
default:
listStats(client, patterns)
}
}
func listStats(client adapter.StatsAPI, patterns []string) {
fmt.Printf("Listing stats.. %s\n", strings.Join(patterns, " "))
list, err := client.ListStats(patterns...)
if err != nil {
log.Fatalln("listing stats failed:", err)
}
for _, stat := range list {
fmt.Printf(" - %v\n", stat)
}
fmt.Printf("Listed %d stats\n", len(list))
}
func dumpStats(client adapter.StatsAPI, patterns []string, skipZeros bool) {
fmt.Printf("Dumping stats.. %s\n", strings.Join(patterns, " "))
stats, err := client.DumpStats(patterns...)
if err != nil {
log.Fatalln("dumping stats failed:", err)
}
n := 0
for _, stat := range stats {
if isZero(stat.Data) && skipZeros {
continue
}
fmt.Printf(" - %-25s %25v %+v\n", stat.Name, stat.Type, stat.Data)
n++
}
fmt.Printf("Dumped %d (%d) stats\n", n, len(stats))
}
func isZero(stat adapter.Stat) bool {
switch s := stat.(type) {
case adapter.ScalarStat:
return s == 0
case adapter.ErrorStat:
return s == 0
case adapter.SimpleCounterStat:
for _, ss := range s {
for _, sss := range ss {
if sss != 0 {
return false
}
}
}
case adapter.CombinedCounterStat:
for _, ss := range s {
for _, sss := range ss {
if sss.Bytes != 0 || sss.Packets != 0 {
return false
}
}
}
}
return true
}
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