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gohangout.go
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gohangout.go
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package main
import (
"flag"
"net/http"
_ "net/http/pprof"
"os"
"os/signal"
"runtime"
"runtime/pprof"
"sync"
"syscall"
"github.com/childe/gohangout/input"
"github.com/golang/glog"
jsoniter "github.com/json-iterator/go"
)
var json = jsoniter.ConfigCompatibleWithStandardLibrary
var options = &struct {
config string
pprof bool
pprofAddr string
cpuprofile string
memprofile string
}{}
var (
worker = flag.Int("worker", 1, "worker thread count")
)
func init() {
flag.StringVar(&options.config, "config", options.config, "path to configuration file or directory")
flag.BoolVar(&options.pprof, "pprof", false, "if pprof")
flag.StringVar(&options.pprofAddr, "pprof-address", "127.0.0.1:8899", "default: 127.0.0.1:8899")
flag.StringVar(&options.cpuprofile, "cpuprofile", "", "write cpu profile to `file`")
flag.StringVar(&options.memprofile, "memprofile", "", "write mem profile to `file`")
flag.Parse()
}
func buildPluginLink(config map[string]interface{}) []*input.InputBox {
boxes := make([]*input.InputBox, 0)
for input_idx, inputI := range config["inputs"].([]interface{}) {
var inputPlugin input.Input
i := inputI.(map[interface{}]interface{})
glog.Infof("input[%d] %v", input_idx+1, i)
// len(i) is 1
for inputTypeI, inputConfigI := range i {
inputType := inputTypeI.(string)
inputConfig := inputConfigI.(map[interface{}]interface{})
inputPlugin = input.GetInput(inputType, inputConfig)
box := input.NewInputBox(inputPlugin, config)
boxes = append(boxes, box)
}
}
return boxes
}
func main() {
if options.pprof {
go func() {
http.ListenAndServe(options.pprofAddr, nil)
}()
}
if options.cpuprofile != "" {
f, err := os.Create(options.cpuprofile)
if err != nil {
glog.Fatalf("could not create CPU profile: %s", err)
}
if err := pprof.StartCPUProfile(f); err != nil {
glog.Fatalf("could not start CPU profile: %s", err)
}
defer pprof.StopCPUProfile()
}
if options.memprofile != "" {
defer func() {
f, err := os.Create(options.memprofile)
if err != nil {
glog.Fatalf("could not create memory profile: %s", err)
}
defer f.Close()
runtime.GC() // get up-to-date statistics
if err := pprof.WriteHeapProfile(f); err != nil {
glog.Fatalf("could not write memory profile: %s", err)
}
}()
}
config, err := parseConfig(options.config)
if err != nil {
glog.Fatalf("could not parse config:%s", err)
}
glog.Infof("%v", config)
boxes := buildPluginLink(config)
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt, syscall.SIGTERM)
go func() {
for {
<-c
signal.Stop(c)
for _, box := range boxes {
box.Shutdown()
}
}
}()
var wg sync.WaitGroup
wg.Add(len(boxes))
defer wg.Wait()
for i, _ := range boxes {
go func(i int) {
defer wg.Done()
boxes[i].Beat(*worker)
}(i)
}
}