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package main
import (
"context"
"fmt"
"io"
"log"
"net/http"
"os"
"os/signal"
"runtime"
"syscall"
"time"
_ "net/http/pprof"
"github.com/centrifugal/centrifuge"
)
func handleLog(e centrifuge.LogEntry) {
log.Printf("%s: %+v", e.Message, e.Fields)
}
func waitExitSignal(n *centrifuge.Node) {
sigCh := make(chan os.Signal, 1)
done := make(chan bool, 1)
signal.Notify(sigCh, syscall.SIGINT, syscall.SIGTERM)
go func() {
<-sigCh
_ = n.Shutdown(context.Background())
done <- true
}()
<-done
}
func main() {
log.Printf("NumCPU: %d", runtime.NumCPU())
cfg := centrifuge.DefaultConfig
cfg.LogLevel = centrifuge.LogLevelError
cfg.LogHandler = handleLog
node, _ := centrifuge.New(cfg)
if os.Getenv("CENTRIFUGE_BROKER") == "redis" {
redisShardConfigs := []centrifuge.RedisShardConfig{
{Address: "localhost:6379"},
}
var redisShards []*centrifuge.RedisShard
for _, redisConf := range redisShardConfigs {
redisShard, err := centrifuge.NewRedisShard(node, redisConf)
if err != nil {
log.Fatal(err)
}
redisShards = append(redisShards, redisShard)
}
broker, err := centrifuge.NewRedisBroker(node, centrifuge.RedisBrokerConfig{
HistoryMetaTTL: 7 * 24 * time.Hour,
Shards: redisShards,
})
if err != nil {
log.Fatal(err)
}
node.SetBroker(broker)
}
node.OnConnecting(func(ctx context.Context, e centrifuge.ConnectEvent) (centrifuge.ConnectReply, error) {
return centrifuge.ConnectReply{
Credentials: ¢rifuge.Credentials{
UserID: "bench",
},
}, nil
})
node.OnConnect(func(client *centrifuge.Client) {
client.OnSubscribe(func(e centrifuge.SubscribeEvent, cb centrifuge.SubscribeCallback) {
cb(centrifuge.SubscribeReply{}, nil)
})
client.OnPublish(func(e centrifuge.PublishEvent, cb centrifuge.PublishCallback) {
cb(centrifuge.PublishReply{}, nil)
})
client.OnMessage(func(e centrifuge.MessageEvent) {
err := client.Send(e.Data)
if err != nil {
if err != io.EOF {
log.Fatalln("error sending to client:", err.Error())
}
}
})
})
if err := node.Run(); err != nil {
panic(err)
}
http.Handle("/connection/websocket", centrifuge.NewWebsocketHandler(node, centrifuge.WebsocketConfig{
WriteTimeout: time.Second,
}))
go func() {
if err := http.ListenAndServe(":8000", nil); err != nil {
panic(err)
}
}()
waitExitSignal(node)
fmt.Println("exiting")
}
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