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Two-round consensus finished; change logging to use log package everywhere; limit the visibility of Consensus struct fields

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pull/2/head
Rongjian Lan 7 years ago
parent 561185a065
commit 403508f2d1
6 changed files with 76 additions and 56 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 15
      benchmark_node.go
  2. 23
      consensus/consensus.go
  3. 57
      consensus/consensus_leader.go
  4. 22
      consensus/consensus_validator.go
  5. 10
      node.go
  6. 3
      p2p/peer.go

15
benchmark_node.go
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@ -5,7 +5,6 @@ import (
"./p2p"
"bufio"
"flag"
"fmt"
"log"
"net"
"os"
@ -48,7 +47,7 @@ func relayToPorts(msg string, conn net.Conn) {
}
count := 0
for count < len(ports) {
fmt.Println(<-ch)
log.Println(<-ch)
count++
}
w.Write([]byte(Message))
@ -72,7 +71,7 @@ func convertIntoInts(data string) []int {
// Do check error.
func checkError(err error) {
if err != nil {
fmt.Fprintf(os.Stderr, "Fatal error: %s", err.Error())
log.Fatalln(os.Stderr, "Fatal error: %s", err.Error())
os.Exit(1)
}
}
@ -104,7 +103,7 @@ func Send(port int, message string, ch chan int) (returnMessage string) {
ip := "127.0.0.1"
returnMessage = SocketClient(ip, message, port)
ch <- port
fmt.Println(returnMessage)
log.Println(returnMessage)
return
}
@ -164,7 +163,7 @@ func main() {
port := flag.String("port", "9000", "port of the node.")
ipfile := flag.String("ipfile", "iplist.txt", "file containing all ip addresses")
flag.Parse()
fmt.Println()
log.Println()
consensusObj := consensus.InitConsensus(*ip, *port, getPeers(*ip, *port, *ipfile), getLeader(*ipfile))
var nodeStatus string
@ -173,8 +172,8 @@ func main() {
} else {
nodeStatus = "validator"
}
fmt.Println(consensusObj)
fmt.Printf("This node is a %s node with ip: %s and port: %s\n", nodeStatus, *ip, *port)
fmt.Println()
log.Println(consensusObj)
log.Printf("This node is a %s node with ip: %s and port: %s\n", nodeStatus, *ip, *port)
log.Println()
startServer(*port, NodeHandler, &consensusObj)
}

23
consensus/consensus.go
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@ -7,17 +7,19 @@ import (
// Consensus data containing all info related to one consensus process
type Consensus struct {
State ConsensusState
state ConsensusState
// Signatures collected from validators
Signatures map[string]string
commits map[string]string
// Signatures collected from validators
responses map[string]string
// Actual block data to reach consensus on
Data string
data string
// List of validators
Validators []p2p.Peer
validators []p2p.Peer
// Leader
Leader p2p.Peer
leader p2p.Peer
// private key of current node
PriKey string
priKey string
// Whether I am leader. False means I am validator
IsLeader bool
}
@ -65,10 +67,11 @@ func InitConsensus(ip, port string, peers []p2p.Peer, leader p2p.Peer) Consensus
} else {
consensus.IsLeader = false
}
consensus.Signatures = make(map[string]string)
consensus.Leader = leaderPeer
consensus.Validators = Peers
consensus.commits = make(map[string]string)
consensus.responses = make(map[string]string)
consensus.leader = leaderPeer
consensus.validators = Peers
consensus.PriKey = ip + ":" + port // use ip:port as unique key for now
consensus.priKey = ip + ":" + port // use ip:port as unique key for now
return consensus
}

57
consensus/consensus_leader.go
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@ -2,7 +2,6 @@ package consensus
import (
"log"
"fmt"
"../p2p"
"sync"
)
@ -22,20 +21,20 @@ func (consensus *Consensus) ProcessMessageLeader(message []byte) {
}
msg := string(payload)
fmt.Printf("[Leader] Received and processing message: %s, %s\n", msgType, msg)
log.Printf("[Leader] Received and processing message: %s, %s\n", msgType, msg)
switch msgType {
case ANNOUNCE:
fmt.Println("Unexpected message type: %s", msgType)
log.Println("Unexpected message type: %s", msgType)
case COMMIT:
consensus.processCommitMessage(msg)
case CHALLENGE:
fmt.Println("Unexpected message type: %s", msgType)
log.Println("Unexpected message type: %s", msgType)
case RESPONSE:
consensus.processResponseMessage(msg)
case START_CONSENSUS:
consensus.processStartConsensusMessage(msg)
default:
fmt.Println("Unexpected message type: %s", msgType)
log.Println("Unexpected message type: %s", msgType)
}
}
@ -48,42 +47,60 @@ func (consensus *Consensus) startConsensus(msg string) {
// prepare message and broadcast to validators
msgToSend := ConstructConsensusMessage(ANNOUNCE, []byte("block"))
p2p.BroadcastMessage(consensus.Validators, msgToSend)
p2p.BroadcastMessage(consensus.validators, msgToSend)
// Set state to ANNOUNCE_DONE
consensus.State = ANNOUNCE_DONE
consensus.state = ANNOUNCE_DONE
}
func (consensus *Consensus) processCommitMessage(msg string) {
// verify and aggregate all the signatures
if _, ok := consensus.Signatures[msg]; !ok {
// proceed only when the message is not received before and this consensus phase is not done.
if _, ok := consensus.commits[msg]; !ok && consensus.state != CHALLENGE_DONE {
mutex.Lock()
consensus.Signatures[msg] = msg
consensus.commits[msg] = msg
log.Printf("Number of commits received: %d", len(consensus.commits))
mutex.Unlock()
} else {
return
}
log.Printf("Number of signatures received: %d", len(consensus.Signatures))
if consensus.State != CHALLENGE_DONE && len(consensus.Signatures) >= (2 * len(consensus.Validators)) / 3 + 1 {
if consensus.state != CHALLENGE_DONE && len(consensus.commits) >= (2 * len(consensus.validators)) / 3 + 1 {
mutex.Lock()
if consensus.State == ANNOUNCE_DONE {
if consensus.state == ANNOUNCE_DONE {
// Set state to CHALLENGE_DONE
consensus.State = CHALLENGE_DONE
consensus.state = CHALLENGE_DONE
}
mutex.Unlock()
// Broadcast challenge
msgToSend := ConstructConsensusMessage(CHALLENGE, []byte("challenge"))
p2p.BroadcastMessage(consensus.Validators, msgToSend)
p2p.BroadcastMessage(consensus.validators, msgToSend)
log.Printf("Consensus reached with %d signatures: %s", len(consensus.Signatures), consensus.Signatures)
log.Printf("Enough commits received with %d signatures: %s", len(consensus.commits), consensus.commits)
}
}
func (consensus *Consensus) processResponseMessage(msg string) {
// verify and aggregate all signatures
// proceed only when the message is not received before and this consensus phase is not done.
if _, ok := consensus.responses[msg]; !ok && consensus.state != FINISHED {
mutex.Lock()
consensus.responses[msg] = msg
log.Printf("Number of responses received: %d", len(consensus.responses))
mutex.Unlock()
} else {
return
}
if consensus.state != FINISHED && len(consensus.responses) >= (2 * len(consensus.validators)) / 3 + 1 {
mutex.Lock()
if consensus.state == CHALLENGE_DONE {
// Set state to FINISHED
consensus.State = FINISHED
consensus.state = FINISHED
log.Println("Hooray! Consensus reached!!!!!!!!!!!!!")
}
mutex.Unlock()
// TODO: composes new block and broadcast the new block to validators
log.Printf("Consensus reached with %d signatures: %s", len(consensus.responses), consensus.responses)
}
}

22
consensus/consensus_validator.go
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@ -2,7 +2,6 @@ package consensus
import (
"log"
"fmt"
"../p2p"
)
@ -19,18 +18,18 @@ func (consensus *Consensus) ProcessMessageValidator(message []byte) {
}
msg := string(payload)
fmt.Printf("[Validator] Received and processing message: %s, %s\n", msgType, msg)
log.Printf("[Validator] Received and processing message: %s, %s\n", msgType, msg)
switch msgType {
case ANNOUNCE:
consensus.processAnnounceMessage(msg)
case COMMIT:
fmt.Println("Unexpected message type: %s", msgType)
log.Println("Unexpected message type: %s", msgType)
case CHALLENGE:
consensus.processChallengeMessage(msg)
case RESPONSE:
fmt.Println("Unexpected message type: %s", msgType)
log.Println("Unexpected message type: %s", msgType)
default:
fmt.Println("Unexpected message type: %s", msgType)
log.Println("Unexpected message type: %s", msgType)
}
}
@ -41,11 +40,11 @@ func (consensus *Consensus) processAnnounceMessage(msg string) {
// TODO: return the signature(commit) to leader
// For now, simply return the private key of this node.
msgToSend := ConstructConsensusMessage(COMMIT, []byte(consensus.PriKey))
p2p.SendMessage(consensus.Leader, msgToSend)
msgToSend := ConstructConsensusMessage(COMMIT, []byte(consensus.priKey))
p2p.SendMessage(consensus.leader, msgToSend)
// Set state to COMMIT_DONE
consensus.State = COMMIT_DONE
consensus.state = COMMIT_DONE
}
@ -54,9 +53,12 @@ func (consensus *Consensus) processChallengeMessage(msg string) {
// sign the message
// return the signature(response) to leader
// TODO: return the signature(response) to leader
// For now, simply return the private key of this node.
msgToSend := ConstructConsensusMessage(RESPONSE, []byte(consensus.priKey))
p2p.SendMessage(consensus.leader, msgToSend)
// Set state to RESPONSE_DONE
consensus.State = RESPONSE_DONE
consensus.state = RESPONSE_DONE
}

10
node.go
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@ -1,7 +1,7 @@
package main
import (
"fmt"
"log"
"math/rand"
"time"
)
@ -32,18 +32,18 @@ func randomString(len int) string {
func (n Node) send(cin <-chan string, id int) {
for msg := range cin {
fmt.Printf("Leader has sent message %s to %d\n", msg, id)
log.Printf("Leader has sent message %s to %d\n", msg, id)
}
}
func consume(cin <-chan string, id int) {
for msg := range cin {
fmt.Printf("Leader has sent message %s to %d\n", msg, id)
log.Printf("Leader has sent message %s to %d\n", msg, id)
}
}
func (n Node) receive() {
fmt.Printf("Node: %d received message\n", n.ip)
log.Printf("Node: %d received message\n", n.ip)
}
func createNode(ip int, isLeader bool) Node {
@ -85,7 +85,7 @@ func TxnGenerator(numOfTxns int, lenOfRandomString int) <-chan string {
go func() {
for i := 0; i < numOfTxns; i++ {
out <- randomString(lenOfRandomString)
fmt.Printf("Transaction Number %d\n", i)
log.Printf("Transaction Number %d\n", i)
//time.Sleep(2 * time.Second)
}
close(out)

3
p2p/peer.go
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@ -3,7 +3,6 @@ package p2p
import (
"bytes"
"encoding/binary"
"fmt"
"log"
"net"
"strings"
@ -74,6 +73,6 @@ func sendWithSocketClient(ip, port string, message []byte) (res string) {
// Send a message to another node with given port.
func send(ip, port string, message []byte) (returnMessage string) {
returnMessage = sendWithSocketClient(ip, port, message)
fmt.Println(returnMessage)
log.Println(returnMessage)
return
}

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