path: root/simulation/simulation.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 simulation

import (
    "sync"
    "time"

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

// Run starts the simulation.
func Run(cfg *config.Config) {
    var (
        networkType = cfg.Networking.Type
        server      *PeerServer
        wg          sync.WaitGroup
        err         error
    )

    dMoment := time.Now().UTC().Add(1 * time.Second)

    // init is a function to init a node.
    init := func(serverEndpoint interface{}) {
        prv, err := ecdsa.NewPrivateKey()
        if err != nil {
            panic(err)
        }
        v := newNode(prv, *cfg)
        wg.Add(1)
        go func() {
            defer wg.Done()
            v.run(serverEndpoint, dMoment)
        }()
    }

    switch networkType {
    case config.NetworkTypeTCP:
        // Intialized a simulation on multiple remotely peers.
        // The peer-server would be initialized with another command.
        init(nil)
    case config.NetworkTypeTCPLocal, config.NetworkTypeFake:
        // Initialize a local simulation with a peer server.
        var serverEndpoint interface{}
        server = NewPeerServer()
        if serverEndpoint, err = server.Setup(cfg); err != nil {
            panic(err)
        }
        wg.Add(1)
        go func() {
            defer wg.Done()
            server.Run()
        }()
        // Initialize all nodes.
        for i := 0; i < cfg.Node.Num; i++ {
            init(serverEndpoint)
        }
    }
    wg.Wait()

    // Do not exit when we are in TCP node, since k8s will restart the pod and
    // cause confusions.
    if networkType == config.NetworkTypeTCP {
        select {}
    }
}