FAB-426 Implemented simple non-valdiating engine

Allows the network to come up and form a simple p2p system.
This is an interim step to refactoring for the v1 network which
will allow for the existing behave test to be executed after
modification in subsequent changeset.

Change-Id: Ibd0403b32f1f4366fae9d84b1db562a1e4a9a86c
Signed-off-by: jeffgarratt <garratt.jeff@gmail.com>

core/peernext/engine.go

@@ -0,0 +1,71 @@
+/*
+Copyright IBM Corp. 2016 All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+		 http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package peer
+
+import (
+	"sync"
+
+	pb "github.com/hyperledger/fabric/protos"
+)
+
+// EngineImpl implements a struct to manage Peer default engine functionality
+type EngineImpl struct {
+	//consenter    consensus.Consenter
+	peerEndpoint *pb.PeerEndpoint
+}
+
+// GetHandlerFactory returns new NewConsensusHandler
+func (eng *EngineImpl) GetHandlerFactory() HandlerFactory {
+	return eng.GetNewPeerHandler
+}
+
+//GetNewPeerHandler handlerFactory function for simple peer discovery
+func (eng *EngineImpl) GetNewPeerHandler(coord MessageHandlerCoordinator, chatStream ChatStream, initiatedStream bool, next MessageHandler) (MessageHandler, error) {
+	return NewPeerHandler(coord, chatStream, initiatedStream, next)
+}
+
+// ProcessTransactionMsg processes a Message in context of a Transaction
+func (eng *EngineImpl) ProcessTransactionMsg(msg *pb.Message, tx *pb.Transaction) (response *pb.Response) {
+	return nil
+}
+
+var engineOnce sync.Once
+
+var engine *EngineImpl
+
+func getEngineImpl() *EngineImpl {
+	return engine
+}
+
+// GetEngine returns initialized Engine
+func GetEngine(coord MessageHandlerCoordinator) (Engine, error) {
+	var err error
+	engineOnce.Do(func() {
+		engine = new(EngineImpl)
+		engine.peerEndpoint, err = coord.GetPeerEndpoint()
+
+		//go func() {
+		//	peerLogger.Debug("Starting up message thread for consenter")
+		//
+		//	// The channel never closes, so this should never break
+		//	for msg := range engine.consensusFan.GetOutChannel() {
+		//		engine.consenter.RecvMsg(msg.Msg, msg.Sender)
+		//	}
+		//}()
+	})
+	return engine, err
+}

core/peernext/peer.go

@@ -613,14 +613,15 @@ func (p *Impl) newHelloMessage() (*pb.HelloMessage, error) {
 	if err != nil {
 		return nil, fmt.Errorf("Error creating hello message: %s", err)
 	}
-	p.ledgerWrapper.RLock()
-	defer p.ledgerWrapper.RUnlock()
-	//size := p.ledgerWrapper.ledger.GetBlockchainSize()
-	blockChainInfo, err := p.ledgerWrapper.ledger.GetBlockchainInfo()
-	if err != nil {
-		return nil, fmt.Errorf("Error creating hello message, error getting block chain info: %s", err)
-	}
-	return &pb.HelloMessage{PeerEndpoint: endpoint, BlockchainInfo: blockChainInfo}, nil
+	//p.ledgerWrapper.RLock()
+	//defer p.ledgerWrapper.RUnlock()
+	////size := p.ledgerWrapper.ledger.GetBlockchainSize()
+	//blockChainInfo, err := p.ledgerWrapper.ledger.GetBlockchainInfo()
+	//if err != nil {
+	//	return nil, fmt.Errorf("Error creating hello message, error getting block chain info: %s", err)
+	//}
+	//return &pb.HelloMessage{PeerEndpoint: endpoint, BlockchainInfo: blockChainInfo}, nil
+	return &pb.HelloMessage{PeerEndpoint: endpoint}, nil
 }
 
 // GetBlockByNumber return a block by block number

peer/node/start.go

@@ -152,7 +152,7 @@ func serve(args []string) error {
 		logger.Debugf("Running as validating peer - installing consensus %s",
 			viper.GetString("peer.validator.consensus"))
 
-		peerServer, err = peer.NewPeerWithEngine(secHelperFunc, nil) //PDMP- remove need for consensus engine
+		peerServer, err = peer.NewPeerWithEngine(secHelperFunc, peer.GetEngine)
 	} else {
 		logger.Debug("Running as non-validating peer")
 		peerServer, err = peer.NewPeerWithHandler(secHelperFunc, peer.NewPeerHandler)