cc-backend/tools/nats-manager/main.go

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// Copyright (C) 2022 NHR@FAU, University Erlangen-Nuremberg.
// All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package main
import (
"flag"
"fmt"
"log"
"os"
"github.com/ClusterCockpit/cc-backend/internal/scheduler"
"github.com/nats-io/nats.go"
)
func usage() {
log.Printf("Usage: nats-pub [-s server] [-creds file] <subject> <msg>\n")
flag.PrintDefaults()
}
func showUsageAndExit(exitcode int) {
usage()
os.Exit(exitcode)
}
func setupPublisher() {
var urls = flag.String("s", nats.DefaultURL, "The nats server URLs (separated by comma)")
var userCreds = flag.String("creds", "", "User Credentials File")
var showHelp = flag.Bool("h", false, "Show help message")
log.SetFlags(0)
flag.Usage = usage
flag.Parse()
if *showHelp {
showUsageAndExit(0)
}
args := flag.Args()
if len(args) != 2 {
showUsageAndExit(1)
}
fmt.Printf("Hello Nats\n")
// Connect Options.
opts := []nats.Option{nats.Name("NATS Sample Publisher")}
// Use UserCredentials
if *userCreds != "" {
opts = append(opts, nats.UserCredentials(*userCreds))
}
// Connect to NATS
nc, err := nats.Connect(*urls, opts...)
if err != nil {
log.Fatal(err)
}
defer nc.Close()
subj, msg := args[0], []byte(args[1])
nc.Publish(subj, msg)
nc.Flush()
if err := nc.LastError(); err != nil {
log.Fatal(err)
} else {
log.Printf("Published [%s] : '%s'\n", subj, msg)
}
os.Exit(0)
}
func main() {
cfgData := []byte(`{"target": "localhost"}`)
var sch scheduler.SlurmNatsScheduler
// sch.URL = "nats://127.0.0.1:1223"
sch.Init(cfgData)
os.Exit(0)
}