Merge pull request #3 from simple-rules/stopConsensus

adding message to stop running consensus

aws-code/transaction_generator.go

@@ -1,12 +1,16 @@
 package main
 
 import (
-	"harmony-benchmark/blockchain"
-	"math/rand"
-	"time"
+	"bufio"
 	"flag"
+	"fmt"
+	"harmony-benchmark/blockchain"
 	"harmony-benchmark/node"
 	"harmony-benchmark/p2p"
+	"math/rand"
+	"os"
+	"strings"
+	"time"
 )
 
 func newRandTransaction() blockchain.Transaction {
@@ -18,16 +22,35 @@ func newRandTransaction() blockchain.Transaction {
 	return tx
 }
 
+func getPeers(Ip, Port, iplist string) []p2p.Peer {
+	file, _ := os.Open(iplist)
+	fscanner := bufio.NewScanner(file)
+	var peerList []p2p.Peer
+	for fscanner.Scan() {
+		p := strings.Split(fscanner.Text(), " ")
+		ip, port, status := p[0], p[1], p[2]
+		if status == "leader" || ip == Ip && port == Port {
+			continue
+		}
+		peer := p2p.Peer{Port: port, Ip: ip}
+		peerList = append(peerList, peer)
+	}
+	return peerList
+}
 func main() {
 
 	ip := flag.String("ip", "127.0.0.1", "IP of the leader")
 	port := flag.String("port", "9000", "port of the leader.")
-	txToSend := flag.Int("tx_count", 100, "number of transaction")
-
+	ipfile := flag.String("ipfile", "local_iplist.txt", "file containing all ip addresses")
+	//getLeader to get ip,port and get totaltime I want to run
+	start := time.Now()
+	totalTime := 60.0
 	txs := make([]blockchain.Transaction, 10)
 	txCount := 0
 	for true {
-		if txCount >= *txToSend {
+		t := time.Now()
+		if t.Sub(start).Seconds() >= totalTime {
+			fmt.Println(int(t.Sub(start)), start, totalTime)
 			break
 		}
 		for i := range txs {
@@ -36,7 +59,12 @@ func main() {
 		}
 		msg := node.ConstructTransactionListMessage(txs)
 		p2p.SendMessage(p2p.Peer{*ip, *port, "n/a"}, msg)
-		txCount += len(txs)
-		time.Sleep(1 * time.Second)  // 10 transactions per second
+		time.Sleep(1 * time.Second) // 10 transactions per second
 	}
+	msg := node.ConstructStopMessage()
+	var leaderPeer p2p.Peer
+	leaderPeer.Ip = *ip
+	leaderPeer.Port = *port
+	peers := append(getPeers(*ip, *port, *ipfile), leaderPeer)
+	p2p.BroadcastMessage(peers, msg)
 }

consensus/consensus_leader.go

@@ -4,20 +4,19 @@ import (
 	"log"
 	"sync"
 
-	"harmony-benchmark/p2p"
 	"bytes"
 	"encoding/binary"
 	"errors"
 	"fmt"
 	"harmony-benchmark/blockchain"
+	"harmony-benchmark/p2p"
 )
 
 var mutex = &sync.Mutex{}
 
-
 func (consensus *Consensus) WaitForNewBlock(blockChannel chan blockchain.Block) {
 	for { // keep waiting for new blocks
-		newBlock := <- blockChannel
+		newBlock := <-blockChannel
 		// TODO: think about potential race condition
 		if consensus.state == READY {
 			consensus.startConsensus(&newBlock)
@@ -134,23 +133,23 @@ func (consensus *Consensus) processCommitMessage(payload []byte) {
 	//#### Read payload data
 	offset := 0
 	// 4 byte consensus id
-	consensusId := binary.BigEndian.Uint32(payload[offset:offset+4])
+	consensusId := binary.BigEndian.Uint32(payload[offset : offset+4])
 	offset += 4
 
 	// 32 byte block hash
-	blockHash := payload[offset:offset+32]
+	blockHash := payload[offset : offset+32]
 	offset += 32
 
 	// 2 byte validator id
-	validatorId := string(payload[offset:offset+2])
+	validatorId := string(payload[offset : offset+2])
 	offset += 2
 
 	// 33 byte commit
-	commit := payload[offset:offset+33]
+	commit := payload[offset : offset+33]
 	offset += 33
 
 	// 64 byte of signature on previous data
-	signature := payload[offset:offset+64]
+	signature := payload[offset : offset+64]
 	offset += 64
 	//#### END: Read payload data
 
@@ -240,23 +239,23 @@ func (consensus *Consensus) processResponseMessage(payload []byte) {
 	//#### Read payload data
 	offset := 0
 	// 4 byte consensus id
-	consensusId := binary.BigEndian.Uint32(payload[offset:offset+4])
+	consensusId := binary.BigEndian.Uint32(payload[offset : offset+4])
 	offset += 4
 
 	// 32 byte block hash
-	blockHash := payload[offset:offset+32]
+	blockHash := payload[offset : offset+32]
 	offset += 32
 
 	// 2 byte validator id
-	validatorId := string(payload[offset:offset+2])
+	validatorId := string(payload[offset : offset+2])
 	offset += 2
 
 	// 32 byte response
-	response := payload[offset:offset+32]
+	response := payload[offset : offset+32]
 	offset += 32
 
 	// 64 byte of signature on previous data
-	signature := payload[offset:offset+64]
+	signature := payload[offset : offset+64]
 	offset += 64
 	//#### END: Read payload data
 

consensus/message.go

@@ -87,7 +87,8 @@ func (msgType MessageType) String() string {
 		"COMMIT",
 		"CHALLENGE",
 		"RESPONSE",
-		"START_CONSENSUS"}
+		"START_CONSENSUS",
+	}
 
 	if msgType < ANNOUNCE || msgType > START_CONSENSUS {
 		return "Unknown"

deploy.sh

@@ -5,4 +5,4 @@ while read ip port mode; do
   go run ./benchmark_main.go -ip $ip -port $port -ipfile $ipfile&
 done < $ipfile
 
-go run ./aws-code/transaction_generator.go
+go run ./aws-code/transaction_generator.go -ipfile $ipfile

message/message.go

@@ -26,9 +26,9 @@ n - 2 bytes       - actual message payload
 const NODE_TYPE_BYTES = 1
 const ACTION_TYPE_BYTES = 1
 
-
 // The category of messages
 type MessageCategory byte
+
 const (
 	COMMITTEE MessageCategory = iota
 	NODE
@@ -37,20 +37,21 @@ const (
 
 // The specific types of message under committee category
 type CommitteeMessageType byte
+
 const (
 	CONSENSUS CommitteeMessageType = iota
 	// TODO: add more types
 )
 
-
 // The specific types of message under node category
 type NodeMessageType byte
+
 const (
 	TRANSACTION NodeMessageType = iota
+	CONTROL
 	// TODO: add more types
 )
 
-
 // Get the message category from the p2p message content
 func GetMessageCategory(message []byte) (MessageCategory, error) {
 	if len(message) < NODE_TYPE_BYTES {
@@ -61,7 +62,7 @@ func GetMessageCategory(message []byte) (MessageCategory, error) {
 
 // Get the action type from the p2p message content
 func GetMessageType(message []byte) (byte, error) {
-	if len(message) < NODE_TYPE_BYTES + ACTION_TYPE_BYTES {
+	if len(message) < NODE_TYPE_BYTES+ACTION_TYPE_BYTES {
 		return 0, errors.New("Failed to get action type: no data available.")
 	}
 	return byte(message[NODE_TYPE_BYTES+ACTION_TYPE_BYTES-1]), nil

node/message.go

@@ -1,10 +1,10 @@
 package node
 
 import (
-	"harmony-benchmark/blockchain"
 	"bytes"
-	"harmony-benchmark/message"
 	"encoding/gob"
+	"harmony-benchmark/blockchain"
+	"harmony-benchmark/message"
 )
 
 type TransactionMessageType int
@@ -13,6 +13,13 @@ const (
 	SEND TransactionMessageType = iota
 )
 
+type ControlMessageType int
+
+const (
+	STOP ControlMessageType = iota
+)
+
+//ConstructTransactionListMessage constructs serialized transactions
 func ConstructTransactionListMessage(transactions []blockchain.Transaction) []byte {
 	byteBuffer := bytes.NewBuffer([]byte{byte(message.NODE)})
 	byteBuffer.WriteByte(byte(message.TRANSACTION))
@@ -20,4 +27,12 @@ func ConstructTransactionListMessage(transactions []blockchain.Transaction) []by
 	encoder := gob.NewEncoder(byteBuffer)
 	encoder.Encode(transactions)
 	return byteBuffer.Bytes()
-}
+}
+
+//ConstructStopMessage is  STOP message
+func ConstructStopMessage() []byte {
+	byteBuffer := bytes.NewBuffer([]byte{byte(message.NODE)})
+	byteBuffer.WriteByte(byte(message.CONTROL))
+	byteBuffer.WriteByte(byte(STOP))
+	return byteBuffer.Bytes()
+}

node/node.go

@@ -1,22 +1,23 @@
 package node
 
 import (
+	"bytes"
+	"encoding/gob"
+	"harmony-benchmark/blockchain"
+	"harmony-benchmark/consensus"
+	"harmony-benchmark/message"
+	"harmony-benchmark/p2p"
 	"log"
 	"net"
 	"os"
-	"harmony-benchmark/p2p"
-	"harmony-benchmark/consensus"
-	"harmony-benchmark/message"
-	"harmony-benchmark/blockchain"
-	"bytes"
-	"encoding/gob"
 	"time"
 )
 
 // A node represents a program (machine) participating in the network
 type Node struct {
-	consensus *consensus.Consensus
-	BlockChannel chan blockchain.Block
+	consensus           *consensus.Consensus
+	consensus           *consensus.Consensus
+	BlockChannel        chan blockchain.Block
 	pendingTransactions []blockchain.Transaction
 }
 
@@ -114,6 +115,12 @@ func (node *Node) NodeHandler(conn net.Conn) {
 			}
 			node.pendingTransactions = append(node.pendingTransactions, *txList...)
 			log.Println(len(node.pendingTransactions))
+		case message.CONTROL:
+			controlType := msgPayload[0]
+			if ControlMessageType(controlType) == STOP {
+				log.Println("Stopping Node")
+				os.Exit(0)
+			}
 
 		}
 	}
@@ -121,7 +128,7 @@ func (node *Node) NodeHandler(conn net.Conn) {
 
 func (node *Node) WaitForConsensusReady(readySignal chan int) {
 	for { // keep waiting for consensus ready
-		<- readySignal
+		<-readySignal
 		// create a new block
 		newBlock := new(blockchain.Block)
 		for {
@@ -149,4 +156,4 @@ func NewNode(consensus *consensus.Consensus) Node {
 	node.consensus = consensus
 	node.BlockChannel = make(chan blockchain.Block)
 	return node
-}
+}