forked from cybozu-go/kkok
/
main.go
123 lines (107 loc) · 2.26 KB
/
main.go
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package main
import (
"context"
"flag"
"fmt"
"os"
"github.com/BurntSushi/toml"
"github.com/cybozu-go/cmd"
"github.com/cybozu-go/kkok"
_ "github.com/cybozu-go/kkok/plugins/filters/all"
_ "github.com/cybozu-go/kkok/plugins/sources/all"
_ "github.com/cybozu-go/kkok/plugins/transports/all"
"github.com/cybozu-go/log"
)
const (
defaultConfigPath = "/etc/kkok.toml"
)
var (
configPath = flag.String("f", defaultConfigPath, "Configuration file name")
flgVersion = flag.Bool("v", false, "Print version and exit")
flgTest = flag.Bool("test", false, "Test config file")
)
func main() {
flag.Parse()
if *flgVersion {
fmt.Println(kkok.Version)
return
}
cfg := kkok.NewConfig()
_, err := toml.DecodeFile(*configPath, cfg)
if err != nil {
log.ErrorExit(err)
}
err = cfg.Log.Apply()
if err != nil {
log.ErrorExit(err)
}
k := kkok.NewKkok()
// register routes
for id, pl := range cfg.Routes {
r := make([]kkok.Transport, len(pl))
for i, p := range pl {
t, err := kkok.NewTransport(p.Type, p.Params)
if err != nil {
log.ErrorExit(err)
}
r[i] = t
}
err = k.AddRoute(id, r)
if err != nil {
log.ErrorExit(err)
}
}
// register filters
idMap := make(map[string]struct{})
for _, p := range cfg.Filters {
f, err := kkok.NewFilter(p.Type, p.Params)
if err != nil {
log.ErrorExit(err)
}
id := f.ID()
if _, ok := idMap[id]; ok {
fmt.Fprintln(os.Stderr, "duplicate filter ID: "+id)
os.Exit(1)
}
idMap[id] = struct{}{}
err = k.AddStaticFilter(f)
if err != nil {
log.ErrorExit(err)
}
}
// start dispatcher
d := kkok.NewDispatcher(cfg.InitialDuration(), cfg.MaxDuration(), k)
if !*flgTest {
cmd.Go(d.Run)
}
for _, p := range cfg.Sources {
src, err := kkok.NewSource(p.Type, p.Params)
if err != nil {
log.ErrorExit(err)
}
if *flgTest {
continue
}
cmd.Go(func(ctx context.Context) error {
return src.Run(ctx, d.Post)
})
}
// start API server
s, err := kkok.NewHTTPServer(cfg.Addr, cfg.APIToken, k, d)
if err != nil {
log.ErrorExit(err)
}
if *flgTest {
// all configurations are tested.
return
}
err = s.ListenAndServe()
if err != nil {
log.ErrorExit(err)
}
// all done. wait for completion.
err = cmd.Wait()
if err != nil && !cmd.IsSignaled(err) {
log.ErrorExit(err)
}
}