From 36cdab206849c7e363e0b9911553098c3e8ca644 Mon Sep 17 00:00:00 2001
From: Felix Lange <fjl@twurst.com>
Date: Tue, 14 Oct 2014 01:58:31 +0200
Subject: all: use (blocking) event package instead of ethreact

---
 ethchain/state_manager.go | 55 +++++++++++++++++------------------------------
 1 file changed, 20 insertions(+), 35 deletions(-)

(limited to 'ethchain/state_manager.go')

diff --git a/ethchain/state_manager.go b/ethchain/state_manager.go
index 589b99ac2..b71cbe8a1 100644
--- a/ethchain/state_manager.go
+++ b/ethchain/state_manager.go
@@ -11,11 +11,10 @@ import (
 
 	"github.com/ethereum/eth-go/ethcrypto"
 	"github.com/ethereum/eth-go/ethlog"
-	"github.com/ethereum/eth-go/ethreact"
 	"github.com/ethereum/eth-go/ethstate"
 	"github.com/ethereum/eth-go/ethutil"
 	"github.com/ethereum/eth-go/ethwire"
-	"github.com/ethereum/eth-go/eventer"
+	"github.com/ethereum/eth-go/event"
 )
 
 var statelogger = ethlog.NewLogger("STATE")
@@ -37,7 +36,6 @@ type EthManager interface {
 	BlockChain() *BlockChain
 	TxPool() *TxPool
 	Broadcast(msgType ethwire.MsgType, data []interface{})
-	Reactor() *ethreact.ReactorEngine
 	PeerCount() int
 	IsMining() bool
 	IsListening() bool
@@ -45,7 +43,7 @@ type EthManager interface {
 	KeyManager() *ethcrypto.KeyManager
 	ClientIdentity() ethwire.ClientIdentity
 	Db() ethutil.Database
-	Eventer() *eventer.EventMachine
+	EventMux() *event.TypeMux
 }
 
 type StateManager struct {
@@ -73,17 +71,15 @@ type StateManager struct {
 	// 'Process' & canonical validation.
 	lastAttemptedBlock *Block
 
-	// Quit chan
-	quit chan bool
+	events event.Subscription
 }
 
 func NewStateManager(ethereum EthManager) *StateManager {
 	sm := &StateManager{
-		mem:  make(map[string]*big.Int),
-		Pow:  &EasyPow{},
-		eth:  ethereum,
-		bc:   ethereum.BlockChain(),
-		quit: make(chan bool),
+		mem: make(map[string]*big.Int),
+		Pow: &EasyPow{},
+		eth: ethereum,
+		bc:  ethereum.BlockChain(),
 	}
 	sm.transState = ethereum.BlockChain().CurrentBlock.State().Copy()
 	sm.miningState = ethereum.BlockChain().CurrentBlock.State().Copy()
@@ -93,36 +89,25 @@ func NewStateManager(ethereum EthManager) *StateManager {
 
 func (self *StateManager) Start() {
 	statelogger.Debugln("Starting state manager")
-
+	self.events = self.eth.EventMux().Subscribe(Blocks(nil))
 	go self.updateThread()
 }
 
 func (self *StateManager) Stop() {
 	statelogger.Debugln("Stopping state manager")
-
-	close(self.quit)
+	self.events.Unsubscribe()
 }
 
 func (self *StateManager) updateThread() {
-	blockChan := self.eth.Eventer().Register("blocks")
-
-out:
-	for {
-		select {
-		case event := <-blockChan:
-			blocks := event.Data.(Blocks)
-			for _, block := range blocks {
-				err := self.Process(block, false)
-				if err != nil {
-					statelogger.Infoln(err)
-					statelogger.Debugf("Block #%v failed (%x...)\n", block.Number, block.Hash()[0:4])
-					statelogger.Debugln(block)
-					break
-				}
+	for ev := range self.events.Chan() {
+		for _, block := range ev.(Blocks) {
+			err := self.Process(block, false)
+			if err != nil {
+				statelogger.Infoln(err)
+				statelogger.Debugf("Block #%v failed (%x...)\n", block.Number, block.Hash()[0:4])
+				statelogger.Debugln(block)
+				break
 			}
-
-		case <-self.quit:
-			break out
 		}
 	}
 }
@@ -202,7 +187,7 @@ done:
 		}
 
 		// Notify all subscribers
-		self.eth.Reactor().Post("newTx:post", tx)
+		self.eth.EventMux().Post(TxEvent{TxPost, tx})
 
 		receipts = append(receipts, receipt)
 		handled = append(handled, tx)
@@ -293,7 +278,7 @@ func (sm *StateManager) Process(block *Block, dontReact bool) (err error) {
 
 		statelogger.Infof("Imported block #%d (%x...)\n", block.Number, block.Hash()[0:4])
 		if dontReact == false {
-			sm.eth.Reactor().Post("newBlock", block)
+			sm.eth.EventMux().Post(NewBlockEvent{block})
 
 			state.Manifest().Reset()
 		}
@@ -434,7 +419,7 @@ func (sm *StateManager) createBloomFilter(state *ethstate.State) *BloomFilter {
 		bloomf.Set(msg.From)
 	}
 
-	sm.eth.Reactor().Post("messages", state.Manifest().Messages)
+	sm.eth.EventMux().Post(state.Manifest().Messages)
 
 	return bloomf
 }
-- 
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