[FAB-2777] Alive msg handling

Move alive message store from gossip impl to discovy impl
to keep all alive messages handling in one place

Change-Id: I98157f1c208375b95db497f8fe8d1fac07ba97f3
Signed-off-by: Gennady Laventman <gennady@il.ibm.com>

gossip/discovery/discovery_impl.go

@@ -27,6 +27,7 @@ import (
 	"strings"
 
 	"github.com/hyperledger/fabric/gossip/common"
+	"github.com/hyperledger/fabric/gossip/gossip/msgstore"
 	"github.com/hyperledger/fabric/gossip/util"
 	proto "github.com/hyperledger/fabric/protos/gossip"
 	"github.com/op/go-logging"
@@ -79,6 +80,8 @@ type gossipDiscoveryImpl struct {
 	aliveMembership *util.MembershipStore
 	deadMembership  *util.MembershipStore
 
+	msgStore msgstore.MessageStore
+
 	bootstrapPeers []string
 
 	comm  CommService
@@ -102,6 +105,7 @@ func NewDiscoveryService(bootstrapPeers []string, self NetworkMember, comm CommS
 		id2Member:        make(map[string]*NetworkMember),
 		aliveMembership:  util.NewMembershipStore(),
 		deadMembership:   util.NewMembershipStore(),
+		msgStore:         msgstore.NewMessageStore(proto.NewGossipMessageComparator(0), func(m interface{}) {}),
 		crypt:            crypt,
 		comm:             comm,
 		lock:             &sync.RWMutex{},
@@ -319,6 +323,12 @@ func (d *gossipDiscoveryImpl) handleMsgFromComm(m *proto.SignedGossipMessage) {
 	}
 
 	if m.IsAliveMsg() {
+		added := d.msgStore.Add(m)
+		if !added {
+			return
+		}
+		d.comm.Gossip(m)
+
 		d.handleAliveMessage(m)
 		return
 	}

gossip/gossip/gossip_impl.go

@@ -70,7 +70,6 @@ type gossipServiceImpl struct {
 	chanState         *channelState
 	disSecAdap        *discoverySecurityAdapter
 	mcs               api.MessageCryptoService
-	aliveMsgStore     msgstore.MessageStore
 	stateInfoMsgStore msgstore.MessageStore
 }
 
@@ -110,8 +109,6 @@ func NewGossipService(conf *Config, s *grpc.Server, secAdvisor api.SecurityAdvis
 		includeIdentityPeriod: time.Now().Add(conf.PublishCertPeriod),
 	}
 
-	g.aliveMsgStore = msgstore.NewMessageStore(proto.NewGossipMessageComparator(0), func(m interface{}) {})
-
 	g.chanState = newChannelState(g)
 	g.emitter = newBatchingEmitter(conf.PropagateIterations,
 		conf.MaxPropagationBurstSize, conf.MaxPropagationBurstLatency,
@@ -298,14 +295,6 @@ func (g *gossipServiceImpl) handleMessage(m proto.ReceivedMessage) {
 		return
 	}
 
-	if msg.IsAliveMsg() {
-		added := g.aliveMsgStore.Add(msg)
-		if !added {
-			return
-		}
-		g.emitter.Add(msg)
-	}
-
 	if msg.IsChannelRestricted() {
 		if gc := g.chanState.getGossipChannelByChainID(msg.Channel); gc == nil {
 			// If we're not in the channel but we should forward to peers of our org