path: root/cmd/dexcon-simulation/main.go

// Copyright 2018 The dexon-consensus-core Authors
// This file is part of the dexon-consensus-core library.
//
// The dexon-consensus-core library is free software: you can redistribute it
// and/or modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation, either version 3 of the License,
// or (at your option) any later version.
//
// The dexon-consensus-core library is distributed in the hope that it will be
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
// General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the dexon-consensus-core library. If not, see
// <http://www.gnu.org/licenses/>.

package main

import (
    "flag"
    "fmt"
    "io"
    "log"
    "math/rand"
    "os"
    "runtime"
    "runtime/pprof"
    "time"

    "github.com/dexon-foundation/dexon-consensus-core/simulation"
    "github.com/dexon-foundation/dexon-consensus-core/simulation/config"
)

var initialize = flag.Bool("init", false, "initialize config file")
var configFile = flag.String("config", "", "path to simulation config file")
var cpuprofile = flag.String("cpuprofile", "", "write cpu profile to `file`")
var memprofile = flag.String("memprofile", "", "write memory profile to `file`")
var legacy = flag.Bool("legacy", false, "legacy consensus protocal")
var logfile = flag.String("log", "", "write log to `file`")

func main() {
    flag.Parse()

    rand.Seed(time.Now().UnixNano())

    if *configFile == "" {
        fmt.Fprintln(os.Stderr, "error: no configuration file specified")
        os.Exit(1)
    }

    if *initialize {
        if err := config.GenerateDefault(*configFile); err != nil {
            fmt.Fprintf(os.Stderr, "error: %s", err)
            os.Exit(1)
        }
        //os.Exit(0)
    }

    if *cpuprofile != "" {
        f, err := os.Create(*cpuprofile)
        if err != nil {
            log.Fatal("could not create CPU profile: ", err)
        }
        if err := pprof.StartCPUProfile(f); err != nil {
            log.Fatal("could not start CPU profile: ", err)
        }
        defer pprof.StopCPUProfile()
    }

    if *logfile != "" {
        f, err := os.Create(*logfile)
        if err != nil {
            log.Fatal("could not create log file: ", err)
        }
        mw := io.MultiWriter(os.Stdout, f)
        log.SetOutput(mw)
    }

    cfg, err := config.Read(*configFile)
    if err != nil {
        panic(err)
    }
    simulation.Run(cfg, *legacy)

    if *memprofile != "" {
        f, err := os.Create(*memprofile)
        if err != nil {
            log.Fatal("could not create memory profile: ", err)
        }
        runtime.GC() // get up-to-date statistics
        if err := pprof.WriteHeapProfile(f); err != nil {
            log.Fatal("could not write memory profile: ", err)
        }
        f.Close()
    }
}