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// 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 (
"math/rand"
"sync"
"time"
"github.com/dexon-foundation/dexon-consensus-core/common"
"github.com/dexon-foundation/dexon-consensus-core/core/types"
)
// FakeNetwork implements the Network interface.
type FakeNetwork struct {
model Model
endpointMutex sync.RWMutex
endpoints map[types.ValidatorID]chan interface{}
}
// NewFakeNetwork returns pointer to a new Network instance.
func NewFakeNetwork(model Model) *FakeNetwork {
return &FakeNetwork{
model: model,
endpoints: make(map[types.ValidatorID]chan interface{}),
}
}
// Start starts the network.
func (n *FakeNetwork) Start() {
}
// NumPeers returns the number of peers in the network.
func (n *FakeNetwork) NumPeers() int {
n.endpointMutex.Lock()
defer n.endpointMutex.Unlock()
return len(n.endpoints)
}
// Join allow a client to join the network. It reutnrs a interface{} channel for
// the client to recieve information.
func (n *FakeNetwork) Join(endpoint Endpoint) chan interface{} {
n.endpointMutex.Lock()
defer n.endpointMutex.Unlock()
if x, exists := n.endpoints[endpoint.GetID()]; exists {
return x
}
recivingChannel := make(chan interface{}, msgBufferSize)
n.endpoints[endpoint.GetID()] = recivingChannel
return recivingChannel
}
// Send sends a msg to another client.
func (n *FakeNetwork) Send(destID types.ValidatorID, msg interface{}) {
clientChannel, exists := n.endpoints[destID]
if !exists {
return
}
go func() {
if rand.Float64() > n.model.LossRate() {
time.Sleep(n.model.Delay())
clientChannel <- msg
}
}()
}
// BroadcastBlock broadcast blocks into the network.
func (n *FakeNetwork) BroadcastBlock(block *types.Block) {
n.endpointMutex.Lock()
defer n.endpointMutex.Unlock()
for endpoint := range n.endpoints {
n.Send(endpoint, block.Clone())
}
}
// DeliverBlocks sends blocks to peerServer.
func (n *FakeNetwork) DeliverBlocks(blocks common.Hashes, id int) {
// TODO
return
}
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