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dispel.go
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dispel.go
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package dispel
import (
"github.com/gogo/protobuf/proto"
"github.com/ibalajiarun/go-consensus/peer"
"github.com/ibalajiarun/go-consensus/peer/peerpb"
"github.com/ibalajiarun/go-consensus/pkg/command/commandpb"
"github.com/ibalajiarun/go-consensus/pkg/logger"
"github.com/ibalajiarun/go-consensus/pkg/worker"
pb "github.com/ibalajiarun/go-consensus/protocols/dispel/dispelpb"
"github.com/ibalajiarun/go-consensus/utils"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promauto"
)
var (
promReproposeCount = promauto.NewCounter(prometheus.CounterOpts{
Namespace: "goconsensus",
Subsystem: "server",
Name: "dispel_repropose_count",
Help: "Dispel Repropose Count",
})
)
type Dispel struct {
id peerpb.PeerID
peers []peerpb.PeerID
maxFailures int
logger logger.Logger
certifier utils.Certifier
nextEpochNumber pb.Epoch
epochs map[pb.Epoch]*epoch
nextDeliverEpoch pb.Epoch
msgs []peerpb.Message
toDeliver []peer.ExecPacket
timers map[peer.TickingTimer]struct{}
rbThreshold int
signDispatcher *worker.Dispatcher
callbackC chan func()
}
func NewDispel(cfg *peer.LocalConfig) *Dispel {
d := &Dispel{
id: cfg.ID,
peers: cfg.Peers,
maxFailures: int(cfg.MaxFailures),
logger: cfg.Logger,
certifier: utils.NewSWCertifier(),
epochs: make(map[pb.Epoch]*epoch),
timers: make(map[peer.TickingTimer]struct{}),
}
if cfg.DispelWaitForAllRb {
d.rbThreshold = len(cfg.Peers)
} else {
d.rbThreshold = len(cfg.Peers) - int(cfg.MaxFailures)
}
if _, ok := cfg.Workers["mac_sign"]; !ok {
d.logger.Panicf("Worker count for mac_sign missing.")
}
if _, ok := cfg.WorkersQueueSizes["mac_sign"]; !ok {
d.logger.Panicf("Worker queue size for mac_sign missing.")
}
d.callbackC = make(chan func(), cfg.WorkersQueueSizes["mac_sign"])
d.signDispatcher = worker.NewDispatcher(
int(cfg.WorkersQueueSizes["mac_sign"]),
int(cfg.Workers["mac_sign"]),
d.callbackC,
)
d.signDispatcher.Run()
return d
}
func (d *Dispel) AsyncCallback() {
for {
select {
case cb := <-d.callbackC:
cb()
default:
return
}
}
}
func (d *Dispel) Callback(peer.ExecCallback) {
panic("not implemented")
}
func (d *Dispel) ClearExecutedCommands() {
d.toDeliver = nil
}
func (d *Dispel) MakeReady() peer.Ready {
return peer.Ready{
Messages: d.msgs,
OrderedCommands: d.toDeliver,
}
}
func (d *Dispel) Request(cmd *commandpb.Command) {
d.onRequest(cmd)
}
func (d *Dispel) Step(message peerpb.Message) {
mirMsg := &pb.DispelMessage{}
if err := proto.Unmarshal(message.Content, mirMsg); err != nil {
panic(err)
}
if !d.certifier.VerifyCertificate(message.Content, 0, message.Certificate) {
panic("Invalid certificate")
}
switch t := mirMsg.Type.(type) {
case *pb.DispelMessage_Broadcast:
d.stepBroadcast(t.Broadcast, message.From)
case *pb.DispelMessage_Consensus:
d.stepConsensus(t.Consensus, message.From)
default:
d.logger.Panicf("Unknown message: %v", mirMsg)
}
}
func (d *Dispel) stepBroadcast(m *pb.RBMessage, from peerpb.PeerID) {
d.logger.Debugf("Replica %d ====[%v, (E: %v, ID: %v)]====>>> Replica %d\n",
from, m.Type, m.EpochNum, m.PeerID, d.id)
switch m.Type {
case pb.RBMessage_Send:
d.onRBSend(m, from)
case pb.RBMessage_Echo:
d.onRBEcho(m, from)
case pb.RBMessage_Ready:
d.onRBReady(m, from)
default:
d.logger.Panicf("unexpected Message type: %v", m.Type)
}
}
func (d *Dispel) stepConsensus(m *pb.ConsensusMessage, from peerpb.PeerID) {
d.logger.Debugf("Replica %d ====[%v, (%v)]====>>> Replica %d\n", from, m.Type, m, d.id)
switch m.Type {
case pb.ConsensusMessage_Estimate:
d.onBVBroadcast(m, from)
case pb.ConsensusMessage_CoordValue:
d.onCoordValue(m, from)
case pb.ConsensusMessage_Aux:
d.onAuxMessage(m, from)
default:
d.logger.Panicf("unexpected Message type: %v", m.Type)
}
}
func (d *Dispel) Tick() {
for t := range d.timers {
t.Tick()
}
}
func (d *Dispel) registerOneTimeTimer(t peer.TickingTimer) {
d.timers[t] = struct{}{}
t.Instrument(func() {
d.unregisterTimer(t)
})
t.Reset()
}
func (d *Dispel) unregisterTimer(t peer.TickingTimer) {
t.Stop()
delete(d.timers, t)
}
func (d *Dispel) enqueueForExecution(cmd *commandpb.Command) {
d.toDeliver = append(d.toDeliver, peer.ExecPacket{Cmd: *cmd})
}
func (d *Dispel) hasExecuted(cmd *commandpb.Command) bool {
for _, pkt := range d.toDeliver {
if pkt.Cmd.Equal(cmd) {
return true
}
}
return false
}
func (d *Dispel) hasBroadcast(cmd *commandpb.Command) bool {
for _, ep := range d.epochs {
rb, ok := ep.rbs[cmd.Target]
if ok && rb.rbs.Status == pb.RBState_Readied {
return true
}
}
return false
}
var _ peer.Protocol = (*Dispel)(nil)