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main.go
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main.go
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/*
Copyright 2017 Loopring Project Ltd (Loopring Foundation).
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package main
import (
"fmt"
"os"
"runtime"
"github.com/Loopring/relay-cluster/node"
"github.com/Loopring/relay-lib/log"
"github.com/Loopring/relay-lib/params"
"gopkg.in/urfave/cli.v1"
"os/signal"
"path/filepath"
"reflect"
)
func main() {
app := newApp()
app.Action = startNode
app.HideVersion = true // we have a command to print the version
app.Copyright = "Copyright 2013-2017 The Loopring Authors"
globalFlags := globalFlags()
app.Flags = append(app.Flags, globalFlags...)
app.Before = func(ctx *cli.Context) error {
runtime.GOMAXPROCS(runtime.NumCPU())
return nil
}
app.After = func(ctx *cli.Context) error {
return nil
}
if err := app.Run(os.Args); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}
func startNode(ctx *cli.Context) error {
globalConfig := setGlobalConfig(ctx)
logger := log.Initialize(globalConfig.Log)
defer func() {
if nil != logger {
logger.Sync()
}
}()
var n *node.Node
signalChan := make(chan os.Signal, 1)
signal.Notify(signalChan, os.Interrupt)
signal.Notify(signalChan, os.Kill)
go func() {
for {
select {
case sig := <-signalChan:
log.Infof("captured %s, exiting...\n", sig.String())
if nil != n {
n.Stop()
}
os.Exit(1)
}
}
}()
n = node.NewNode(logger, globalConfig)
n.Start()
log.Info("started")
n.Wait()
return nil
}
func newApp() *cli.App {
app := cli.NewApp()
app.Name = filepath.Base(os.Args[0])
app.Version = params.Version
app.Usage = "the Loopring/relay command line interface"
app.Author = ""
app.Email = ""
return app
}
func globalFlags() []cli.Flag {
return []cli.Flag{
cli.StringFlag{
Name: "config,c",
Usage: "config file",
},
}
}
func setGlobalConfig(ctx *cli.Context) *node.GlobalConfig {
file := ""
if ctx.IsSet("config") {
file = ctx.String("config")
}
globalConfig := node.LoadConfig(file)
if _, err := node.Validator(reflect.ValueOf(globalConfig).Elem()); nil != err {
panic(err)
}
return globalConfig
}