131 lines
2.6 KiB
Go
131 lines
2.6 KiB
Go
// Copyright 2015 The Chihaya Authors. All rights reserved.
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// Use of this source code is governed by the BSD 2-Clause license,
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// which can be found in the LICENSE file.
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package chihaya
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import (
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"flag"
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"os"
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"os/signal"
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"runtime"
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"runtime/pprof"
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"sync"
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"syscall"
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"github.com/golang/glog"
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"github.com/chihaya/chihaya/config"
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"github.com/chihaya/chihaya/http"
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"github.com/chihaya/chihaya/stats"
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"github.com/chihaya/chihaya/tracker"
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"github.com/chihaya/chihaya/udp"
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// See the README for how to import custom drivers.
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_ "github.com/chihaya/chihaya/backend/noop"
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)
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var (
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maxProcs int
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profile string
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configPath string
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)
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func init() {
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flag.IntVar(&maxProcs, "maxprocs", runtime.NumCPU(), "maximum parallel threads")
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flag.StringVar(&profile, "profile", "", "if non-empty, path to write profiling data")
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flag.StringVar(&configPath, "config", "", "path to the configuration file")
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}
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// Boot starts Chihaya. By exporting this function, anyone can import their own
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// custom drivers into their own package main and then call chihaya.Boot.
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func Boot() {
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defer glog.Flush()
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flag.Parse()
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runtime.GOMAXPROCS(maxProcs)
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glog.V(1).Info("Set max threads to ", maxProcs)
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if profile != "" {
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f, err := os.Create(profile)
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if err != nil {
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glog.Fatalf("Failed to create profile file: %s\n", err)
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}
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defer f.Close()
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pprof.StartCPUProfile(f)
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glog.Info("Started profiling")
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defer func() {
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pprof.StopCPUProfile()
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glog.Info("Stopped profiling")
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}()
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}
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cfg, err := config.Open(configPath)
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if err != nil {
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glog.Fatalf("Failed to parse configuration file: %s\n", err)
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}
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if cfg == &config.DefaultConfig {
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glog.V(1).Info("Using default config")
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} else {
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glog.V(1).Infof("Loaded config file: %s", configPath)
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}
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stats.DefaultStats = stats.New(cfg.StatsConfig)
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tkr, err := tracker.New(cfg)
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if err != nil {
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glog.Fatal("New: ", err)
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}
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var wg sync.WaitGroup
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var servers []tracker.Server
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if cfg.HTTPListenAddr != "" {
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wg.Add(1)
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srv := http.NewServer(cfg, tkr)
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servers = append(servers, srv)
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go func() {
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defer wg.Done()
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srv.Serve(cfg.HTTPListenAddr)
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}()
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}
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if cfg.UDPListenAddr != "" {
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wg.Add(1)
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srv := udp.NewServer(cfg, tkr)
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servers = append(servers, srv)
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go func() {
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defer wg.Done()
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srv.Serve(cfg.UDPListenAddr)
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}()
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}
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shutdown := make(chan os.Signal)
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signal.Notify(shutdown, syscall.SIGINT, syscall.SIGTERM)
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go func() {
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wg.Wait()
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signal.Stop(shutdown)
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close(shutdown)
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}()
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<-shutdown
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glog.Info("Shutting down...")
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for _, srv := range servers {
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srv.Stop()
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}
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<-shutdown
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if err := tkr.Close(); err != nil {
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glog.Errorf("Failed to shut down tracker cleanly: %s", err.Error())
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}
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}
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