Performance improvement by using strict equality, fixed heartbeat issue in connection stage

package.json

@@ -1,18 +1,19 @@
 {
   "name": "eventstore-node",
-  "version": "0.0.2",
+  "version": "0.0.6",
   "description": "A port of the EventStore .Net ClientAPI to Node.js",
   "main": "index.js",
-  "directories": {
-    "lib": "lib",
-    "test": "test"
-  },
   "scripts": {
     "clean": "rm lib/dist.js",
     "build": "webpack",
     "pretest": "npm run build",
-    "test": "nodeunit"
+    "test": "nodeunit",
+    "prepublish": "npm run build"
   },
+  "files": [
+    "lib",
+    "src"
+  ],
   "repository": {
     "type": "git",
     "url": "git+https://github.com/nicdex/eventstore-node.git"

src/clientOperations/connectToPersistentSubscriptionOperation.js

@@ -37,38 +37,38 @@ ConnectToPersistentSubscriptionOperation.prototype._createSubscriptionPackage =
 };
 
 ConnectToPersistentSubscriptionOperation.prototype._inspectPackage = function(pkg) {
-  if (pkg.command == TcpCommand.PersistentSubscriptionConfirmation)
+  if (pkg.command === TcpCommand.PersistentSubscriptionConfirmation)
   {
     var dto = ClientMessage.PersistentSubscriptionConfirmation.decode(pkg.data.toBuffer());
     this._confirmSubscription(dto.last_commit_position, dto.last_event_number);
     this._subscriptionId = dto.subscription_id;
     return new InspectionResult(InspectionDecision.Subscribed, "SubscriptionConfirmation");
   }
-  if (pkg.command == TcpCommand.PersistentSubscriptionStreamEventAppeared)
+  if (pkg.command === TcpCommand.PersistentSubscriptionStreamEventAppeared)
   {
     var dto = ClientMessage.PersistentSubscriptionStreamEventAppeared.decode(pkg.data.toBuffer());
     this._onEventAppeared(new results.ResolvedEvent(dto.event));
     return new InspectionResult(InspectionDecision.DoNothing, "StreamEventAppeared");
   }
-  if (pkg.command == TcpCommand.SubscriptionDropped)
+  if (pkg.command === TcpCommand.SubscriptionDropped)
   {
     var dto = ClientMessage.SubscriptionDropped.decode(pkg.data.toBuffer());
-    if (dto.reason == ClientMessage.SubscriptionDropped.SubscriptionDropReason.AccessDenied)
+    if (dto.reason === ClientMessage.SubscriptionDropped.SubscriptionDropReason.AccessDenied)
     {
       this.dropSubscription(SubscriptionDropReason.AccessDenied, new Error("You do not have access to the stream."));
       return new InspectionResult(InspectionDecision.EndOperation, "SubscriptionDropped");
     }
-    if (dto.reason == ClientMessage.SubscriptionDropped.SubscriptionDropReason.NotFound)
+    if (dto.reason === ClientMessage.SubscriptionDropped.SubscriptionDropReason.NotFound)
     {
       this.dropSubscription(SubscriptionDropReason.NotFound, new Error("Subscription not found"));
       return new InspectionResult(InspectionDecision.EndOperation, "SubscriptionDropped");
     }
-    if (dto.reason == ClientMessage.SubscriptionDropped.SubscriptionDropReason.PersistentSubscriptionDeleted)
+    if (dto.reason === ClientMessage.SubscriptionDropped.SubscriptionDropReason.PersistentSubscriptionDeleted)
     {
       this.dropSubscription(SubscriptionDropReason.PersistentSubscriptionDeleted, new Error("Persistent subscription deleted."));
       return new InspectionResult(InspectionDecision.EndOperation, "SubscriptionDropped");
     }
-    if (dto.reason == ClientMessage.SubscriptionDropped.SubscriptionDropReason.SubscriberMaxCountReached)
+    if (dto.reason === ClientMessage.SubscriptionDropped.SubscriptionDropReason.SubscriberMaxCountReached)
     {
       this.dropSubscription(SubscriptionDropReason.MaxSubscribersReached, new Error("Maximum subscribers reached."));
       return new InspectionResult(InspectionDecision.EndOperation, "SubscriptionDropped");
@@ -111,10 +111,10 @@ ConnectToPersistentSubscriptionOperation.prototype.notifyEventsFailed = function
       action);
 
   var pkg = new TcpPackage(TcpCommand.PersistentSubscriptionNakEvents,
-      this._userCredentials != null ? TcpFlags.Authenticated : TcpFlags.None,
+      this._userCredentials !== null ? TcpFlags.Authenticated : TcpFlags.None,
       this._correlationId,
-      this._userCredentials != null ? this._userCredentials.username : null,
-      this._userCredentials != null ? this._userCredentials.password : null,
+      this._userCredentials !== null ? this._userCredentials.username : null,
+      this._userCredentials !== null ? this._userCredentials.password : null,
       createBufferSegment(dto.toBuffer()));
   this._enqueueSend(pkg);
 };

src/clientOperations/createPersistentSubscriptionOperation.js

@@ -39,7 +39,7 @@ CreatePersistentSubscriptionOperation.prototype._createRequestDto = function() {
   return new ClientMessage.CreatePersistentSubscription(this._groupName, this._stream, this._resolveLinkTos,
       this._startFromBeginning, this._messageTimeoutMilliseconds, this._recordStatistics, this._liveBufferSize,
       this._readBatchSize, this._bufferSize, this._maxRetryCount,
-      this._namedConsumerStrategy == SystemConsumerStrategies.RoundRobin, this._checkPointAfter,
+      this._namedConsumerStrategy === SystemConsumerStrategies.RoundRobin, this._checkPointAfter,
       this._maxCheckPointCount, this._minCheckPointCount, this._maxSubscriberCount, this._namedConsumerStrategy);
 };
 

src/clientOperations/operationBase.js

@@ -42,7 +42,7 @@ OperationBase.prototype._succeed = function() {
   if (!this._completed) {
     this._completed = true;
 
-    if (this._response != null)
+    if (this._response)
       this._cb(null, this._transformResponse(this._response));
     else
       this._cb(new Error("No result."))
@@ -118,7 +118,7 @@ OperationBase.prototype._inspectNotHandled = function(pkg)
 
     case ClientMessage.NotHandled.NotHandledReason.NotMaster:
       var masterInfo = ClientMessage.NotHandled.MasterInfo.decode(message.additional_info);
-      return new new InspectionResult(InspectionDecision.Reconnect, "NotHandled - NotMaster",
+      return new InspectionResult(InspectionDecision.Reconnect, "NotHandled - NotMaster",
           {host: masterInfo.external_tcp_address, port: masterInfo.external_tcp_port},
           {host: masterInfo.external_secure_tcp_address, port: masterInfo.external_secure_tcp_port});
 
@@ -130,7 +130,7 @@ OperationBase.prototype._inspectNotHandled = function(pkg)
 
 OperationBase.prototype._inspectUnexpectedCommand = function(pkg, expectedCommand)
 {
-  if (pkg.command == expectedCommand)
+  if (pkg.command === expectedCommand)
     throw new Error("Command shouldn't be " + TcpCommand.getName(pkg.command));
 
   this.log.error("Unexpected TcpCommand received.\n"

src/clientOperations/subscriptionOperation.js

@@ -46,7 +46,7 @@ SubscriptionOperation.prototype._enqueueSend = function(pkg) {
 SubscriptionOperation.prototype.subscribe = function(correlationId, connection) {
   if (connection === null) throw new TypeError("connection is null.");
 
-  if (this._subscription != null || this._unsubscribed != 0)
+  if (this._subscription !== null || this._unsubscribed)
     return false;
 
   this._correlationId = correlationId;
@@ -128,7 +128,7 @@ SubscriptionOperation.prototype.inspectPackage = function(pkg) {
 
       case TcpCommand.NotHandled:
       {
-        if (this._subscription != null)
+        if (this._subscription !== null)
           throw new Error("NotHandled command appeared while we already subscribed.");
 
         var message = ClientMessage.NotHandled.decode(pkg.data.toBuffer());

src/clientOperations/updatePersistentSubscriptionOperation.js

@@ -39,7 +39,7 @@ UpdatePersistentSubscriptionOperation.prototype._createRequestDto = function() {
   return new ClientMessage.UpdatePersistentSubscription(this._groupName, this._stream, this._resolveLinkTos,
       this._startFromBeginning, this._messageTimeoutMilliseconds, this._recordStatistics, this._liveBufferSize,
       this._readBatchSize, this._bufferSize, this._maxRetryCount,
-      this._namedConsumerStrategy == SystemConsumerStrategies.RoundRobin, this._checkPointAfter,
+      this._namedConsumerStrategy === SystemConsumerStrategies.RoundRobin, this._checkPointAfter,
       this._maxCheckPointCount, this._minCheckPointCount, this._maxSubscriberCount, this._namedConsumerStrategy);
 };
 

src/clientOperations/volatileSubscriptionOperation.js

@@ -22,21 +22,21 @@ util.inherits(VolatileSubscriptionOperation, SubscriptionOperation);
 VolatileSubscriptionOperation.prototype._createSubscriptionPackage = function() {
   var dto = new ClientMessage.SubscribeToStream(this._streamId, this._resolveLinkTos);
   return new TcpPackage(TcpCommand.SubscribeToStream,
-      this._userCredentials != null ? TcpFlags.Authenticated : TcpFlags.None,
+      this._userCredentials !== null ? TcpFlags.Authenticated : TcpFlags.None,
       this._correlationId,
-      this._userCredentials != null ? this._userCredentials.username : null,
-      this._userCredentials != null ? this._userCredentials.password : null,
+      this._userCredentials !== null ? this._userCredentials.username : null,
+      this._userCredentials !== null ? this._userCredentials.password : null,
       new BufferSegment(dto.toBuffer()));
 };
 
 VolatileSubscriptionOperation.prototype._inspectPackage = function(pkg) {
   try {
-    if (pkg.command == TcpCommand.SubscriptionConfirmation) {
+    if (pkg.command === TcpCommand.SubscriptionConfirmation) {
       var dto = ClientMessage.SubscriptionConfirmation.decode(pkg.data.toBuffer());
       this._confirmSubscription(dto.last_commit_position, dto.last_event_number);
       return new InspectionResult(InspectionDecision.Subscribed, "SubscriptionConfirmation");
     }
-    if (pkg.command == TcpCommand.StreamEventAppeared) {
+    if (pkg.command === TcpCommand.StreamEventAppeared) {
       var dto = ClientMessage.StreamEventAppeared.decode(pkg.data.toBuffer());
       this._onEventAppeared(new results.ResolvedEvent(dto.event));
       return new InspectionResult(InspectionDecision.DoNothing, "StreamEventAppeared");

src/core/clusterDnsEndPointDiscoverer.js

@@ -38,7 +38,7 @@ ClusterDnsEndPointDiscoverer.prototype.discover = function(failedTcpEndPoint) {
         return endPoints;
       })
       .catch(function (exc) {
-        self._log.info(util.format("Discovering attempt %d/%d failed with error: %s.", attempt, self._maxDiscoverAttempts, exc));
+        self._log.info(util.format("Discovering attempt %d/%d failed with error: %s.\n%s", attempt, self._maxDiscoverAttempts, exc, exc.stack));
       })
       .then(function (endPoints) {
         if (endPoints)
@@ -67,6 +67,7 @@ ClusterDnsEndPointDiscoverer.prototype._discoverEndPoint = function (failedTcpEn
     var self = this;
     var promise = Promise.resolve();
     var j = 0;
+    self._log.debug('Gossip candidates', gossipCandidates);
     for (var i = 0; i < gossipCandidates.length; i++) {
       promise = promise.then(function (endPoints) {
         if (endPoints) return endPoints;
@@ -90,10 +91,9 @@ ClusterDnsEndPointDiscoverer.prototype._discoverEndPoint = function (failedTcpEn
 };
 
 ClusterDnsEndPointDiscoverer.prototype._getGossipCandidatesFromOldGossip = function (oldGossip, failedTcpEndPoint) {
-  if (failedTcpEndPoint === null) return oldGossip;
+  if (failedTcpEndPoint === null) return this._arrangeGossipCandidates(oldGossip);
   var gossipCandidates = oldGossip.filter(function(x) {
-    //TODO: failedTcpEndpoint.host might not be an ip
-    return (x.externalTcpPort !== failedTcpEndPoint.port && x.externalTcpIp !== failedTcpEndPoint.host);
+    return !(x.externalTcpPort === failedTcpEndPoint.port && x.externalTcpIp === failedTcpEndPoint.host);
   });
   return this._arrangeGossipCandidates(gossipCandidates);
 };
@@ -133,6 +133,7 @@ ClusterDnsEndPointDiscoverer.prototype._getGossipCandidatesFromDns = function ()
 
 ClusterDnsEndPointDiscoverer.prototype._tryGetGossipFrom = function (endPoint) {
   var options = {
+    host: endPoint.endPoint.host,
     hostname: endPoint.endPoint.hostname,
     port: endPoint.endPoint.port,
     path: '/gossip?format=json'
@@ -140,6 +141,7 @@ ClusterDnsEndPointDiscoverer.prototype._tryGetGossipFrom = function (endPoint) {
   if (endPoint.hostHeader) {
     options.headers = {'Host': endPoint.hostHeader};
   }
+  this._log.info('Try get gossip from', endPoint);
   var self = this;
   return new Promise(function (resolve, reject) {
     try {
@@ -215,7 +217,7 @@ ClusterDnsEndPointDiscoverer.prototype._tryDetermineBestNode = function (members
   var secTcp = node.externalSecureTcpPort > 0
     ? {host: externalTcpIp, port: node.externalSecureTcpPort}
     : null;
-  this._log.info(util.format("Discovering: found best choice [%j,%j] (%s).", normTcp, secTcp == null ? "n/a" : secTcp, node.state));
+  this._log.info(util.format("Discovering: found best choice [%j,%j] (%s).", normTcp, secTcp === null ? "n/a" : secTcp, node.state));
   return new NodeEndPoints(normTcp, secTcp);
 };
 

src/core/eventStoreConnectionLogicHandler.js

@@ -165,7 +165,7 @@ EventStoreConnectionLogicHandler.prototype._startConnection = function(cb, endpo
  * @private
  */
 EventStoreConnectionLogicHandler.prototype._closeConnection = function(reason, error) {
-  if (this._state == ConnectionState.Closed) {
+  if (this._state === ConnectionState.Closed) {
     this._logDebug("CloseConnection IGNORED because is ESConnection is CLOSED, reason %s, error %s.", reason, error ? error.stack : '');
     return;
   }
@@ -189,7 +189,7 @@ EventStoreConnectionLogicHandler.prototype._closeConnection = function(reason, e
 
 EventStoreConnectionLogicHandler.prototype._closeTcpConnection = function(reason) {
   if (!this._connection) {
-    this._logDebug("CloseTcpConnection IGNORED because _connection == null");
+    this._logDebug("CloseTcpConnection IGNORED because _connection === null");
     return;
   }
 
@@ -320,7 +320,7 @@ EventStoreConnectionLogicHandler.prototype._startPersistentSubscription = functi
 
 EventStoreConnectionLogicHandler.prototype._establishTcpConnection = function(endPoints) {
   var endPoint = this._settings.useSslConnection ? endPoints.secureTcpEndPoint : endPoints.tcpEndPoint;
-  if (endPoint == null)
+  if (endPoint === null)
   {
     this._closeConnection("No end point to node specified.");
     return;
@@ -328,8 +328,8 @@ EventStoreConnectionLogicHandler.prototype._establishTcpConnection = function(en
 
   this._logDebug("EstablishTcpConnection to [%j]", endPoint);
 
-  if (this._state != ConnectionState.Connecting) return;
-  if (this._connectingPhase != ConnectingPhase.EndPointDiscovery) return;
+  if (this._state !== ConnectionState.Connecting) return;
+  if (this._connectingPhase !== ConnectingPhase.EndPointDiscovery) return;
 
   var self = this;
   this._connectingPhase = ConnectingPhase.ConnectionEstablishing;
@@ -358,10 +358,10 @@ EventStoreConnectionLogicHandler.prototype._establishTcpConnection = function(en
 };
 
 EventStoreConnectionLogicHandler.prototype._tcpConnectionEstablished = function(connection) {
-  if (this._state != ConnectionState.Connecting || !this._connection.equals(connection) || connection.isClosed)
+  if (this._state !== ConnectionState.Connecting || !this._connection.equals(connection) || connection.isClosed)
   {
     this._logDebug("IGNORED (_state %s, _conn.Id %s, conn.Id %s, conn.closed %s): TCP connection to [%j, L%j] established.",
-        this._state, this._connection == null ? EmptyGuid : this._connection.connectionId, connection.connectionId,
+        this._state, this._connection === null ? EmptyGuid : this._connection.connectionId, connection.connectionId,
         connection.isClosed, connection.remoteEndPoint, connection.localEndPoint);
     return;
   }
@@ -373,7 +373,7 @@ EventStoreConnectionLogicHandler.prototype._tcpConnectionEstablished = function(
     timeStamp: Date.now()
   };
 
-  if (this._settings.defaultUserCredentials != null)
+  if (this._settings.defaultUserCredentials !== null)
   {
     this._connectingPhase = ConnectingPhase.Authentication;
 
@@ -402,7 +402,7 @@ EventStoreConnectionLogicHandler.prototype._goToConnectedState = function() {
 
   this.emit('connected', this._connection.remoteEndPoint);
 
-  if (Date.now() - this._lastTimeoutsTimeStamp >= this._settings.operationTimeoutCheckPeriod)
+  if ((Date.now() - this._lastTimeoutsTimeStamp) >= this._settings.operationTimeoutCheckPeriod)
   {
     this._operations.checkTimeoutsAndRetry(this._connection);
     this._subscriptions.checkTimeoutsAndRetry(this._connection);
@@ -411,19 +411,19 @@ EventStoreConnectionLogicHandler.prototype._goToConnectedState = function() {
 };
 
 EventStoreConnectionLogicHandler.prototype._tcpConnectionError = function(connection, error) {
-  if (this._connection != connection) return;
-  if (this._state == ConnectionState.Closed) return;
+  if (!this._connection.equals(connection)) return;
+  if (this._state === ConnectionState.Closed) return;
 
   this._logDebug("TcpConnectionError connId %s, exc %s.", connection.connectionId, error);
   this._closeConnection("TCP connection error occurred.", error);
 };
 
 EventStoreConnectionLogicHandler.prototype._tcpConnectionClosed = function(connection, error) {
-  if (this._state == ConnectionState.Init) throw new Error();
-  if (this._state == ConnectionState.Closed || !this._connection.equals(connection))
+  if (this._state === ConnectionState.Init) throw new Error();
+  if (this._state === ConnectionState.Closed || !this._connection.equals(connection))
   {
     this._logDebug("IGNORED (_state: %s, _conn.ID: %s, conn.ID: %s): TCP connection to [%j, L%j] closed.",
-        this._state, this._connection == null ? EmptyGuid : this._connection.connectionId,  connection.connectionId,
+        this._state, this._connection === null ? EmptyGuid : this._connection.connectionId,  connection.connectionId,
         connection.remoteEndPoint, connection.localEndPoint);
     return;
   }
@@ -447,7 +447,7 @@ EventStoreConnectionLogicHandler.prototype._tcpConnectionClosed = function(conne
 };
 
 EventStoreConnectionLogicHandler.prototype._handleTcpPackage = function(connection, pkg) {
-  if (!connection.equals(this._connection) || this._state == ConnectionState.Closed || this._state == ConnectionState.Init)
+  if (!connection.equals(this._connection) || this._state === ConnectionState.Closed || this._state === ConnectionState.Init)
   {
     this._logDebug("IGNORED: HandleTcpPackage connId %s, package %s, %s.",
                    connection.connectionId, TcpCommand.getName(pkg.command), pkg.correlationId);
@@ -458,9 +458,9 @@ EventStoreConnectionLogicHandler.prototype._handleTcpPackage = function(connecti
                  this._connection.connectionId, TcpCommand.getName(pkg.command), pkg.correlationId);
   this._packageNumber += 1;
 
-  if (pkg.command == TcpCommand.HeartbeatResponseCommand)
+  if (pkg.command === TcpCommand.HeartbeatResponseCommand)
     return;
-  if (pkg.command == TcpCommand.HeartbeatRequestCommand)
+  if (pkg.command === TcpCommand.HeartbeatRequestCommand)
   {
     this._connection.enqueueSend(new TcpPackage(
       TcpCommand.HeartbeatResponseCommand,
@@ -469,13 +469,13 @@ EventStoreConnectionLogicHandler.prototype._handleTcpPackage = function(connecti
     return;
   }
 
-  if (pkg.command == TcpCommand.Authenticated || pkg.command == TcpCommand.NotAuthenticated)
+  if (pkg.command === TcpCommand.Authenticated || pkg.command === TcpCommand.NotAuthenticated)
   {
-    if (this._state == ConnectionState.Connecting
-        && this._connectingPhase == ConnectingPhase.Authentication
-        && this._authInfo.correlationId == pkg.correlationId)
+    if (this._state === ConnectionState.Connecting
+        && this._connectingPhase === ConnectingPhase.Authentication
+        && this._authInfo.correlationId === pkg.correlationId)
     {
-      if (pkg.command == TcpCommand.NotAuthenticated)
+      if (pkg.command === TcpCommand.NotAuthenticated)
         this.emit('authenticationFailed', "Not authenticated");
 
       this._goToConnectedState();
@@ -483,7 +483,7 @@ EventStoreConnectionLogicHandler.prototype._handleTcpPackage = function(connecti
     }
   }
 
-  if (pkg.command == TcpCommand.BadRequest && pkg.correlationId == EmptyGuid)
+  if (pkg.command === TcpCommand.BadRequest && pkg.correlationId === EmptyGuid)
   {
     var message = "<no message>";
     try {
@@ -515,7 +515,7 @@ EventStoreConnectionLogicHandler.prototype._handleTcpPackage = function(connecti
       default:
         throw new Error("Unknown InspectionDecision: " + result.decision);
     }
-    if (this._state == ConnectionState.Connected)
+    if (this._state === ConnectionState.Connected)
       this._operations.scheduleWaitingOperations(connection);
 
     return;
@@ -557,13 +557,13 @@ EventStoreConnectionLogicHandler.prototype._reconnectTo = function(endPoints) {
   var endPoint = this._settings.useSslConnection
       ? endPoints.secureTcpEndPoint
       : endPoints.tcpEndPoint;
-  if (endPoint == null)
+  if (endPoint === null)
   {
     this._closeConnection("No end point is specified while trying to reconnect.");
     return;
   }
 
-  if (this._state != ConnectionState.Connected || this._connection.remoteEndPoint == endPoint)
+  if (this._state !== ConnectionState.Connected || this._connection.remoteEndPoint === endPoint)
     return;
 
   var msg = util.format("EventStoreConnection '%s': going to reconnect to [%j]. Current endpoint: [%j, L%j].",
@@ -581,7 +581,7 @@ EventStoreConnectionLogicHandler.prototype._timerTick = function() {
   {
     case ConnectionState.Init: break;
     case ConnectionState.Connecting:
-      if (this._connectingPhase == ConnectingPhase.Reconnecting && Date.now() - this._reconnInfo.timeStamp >= this._settings.reconnectionDelay)
+      if (this._connectingPhase === ConnectingPhase.Reconnecting && (Date.now() - this._reconnInfo.timeStamp) >= this._settings.reconnectionDelay)
       {
         this._logDebug("TimerTick checking reconnection...");
 
@@ -594,17 +594,17 @@ EventStoreConnectionLogicHandler.prototype._timerTick = function() {
           this._discoverEndpoint(null);
         }
       }
-      else if (this._connectingPhase == ConnectingPhase.Authentication && Date.now() - this._authInfo.timeStamp >= this._settings.operationTimeout)
+      else if (this._connectingPhase === ConnectingPhase.Authentication && (Date.now() - this._authInfo.timeStamp) >= this._settings.operationTimeout)
       {
         this.emit('authenticationFailed', "Authentication timed out.");
         this._goToConnectedState();
       }
-      else if (this._connectingPhase > ConnectingPhase.ConnectionEstablishing)
+      else if (this._connectingPhase === ConnectingPhase.Authentication || this._connectingPhase === ConnectingPhase.Connected)
         this._manageHeartbeats();
       break;
     case ConnectionState.Connected:
       // operations timeouts are checked only if connection is established and check period time passed
-      if (Date.now() - this._lastTimeoutsTimeStamp >= this._settings.operationTimeoutCheckPeriod)
+      if ((Date.now() - this._lastTimeoutsTimeStamp) >= this._settings.operationTimeoutCheckPeriod)
       {
         // On mono even impossible connection first says that it is established
         // so clearing of reconnection count on ConnectionEstablished event causes infinite reconnections.
@@ -624,14 +624,14 @@ EventStoreConnectionLogicHandler.prototype._timerTick = function() {
 };
 
 EventStoreConnectionLogicHandler.prototype._manageHeartbeats = function() {
-  if (this._connection == null) return;
+  if (this._connection === null) return;
 
   var timeout = this._heartbeatInfo.isIntervalStage ? this._settings.heartbeatInterval : this._settings.heartbeatTimeout;
-  if (Date.now() - this._heartbeatInfo.timeStamp < timeout)
+  if ((Date.now() - this._heartbeatInfo.timeStamp) < timeout)
     return;
 
   var packageNumber = this._packageNumber;
-  if (this._heartbeatInfo.lastPackageNumber != packageNumber)
+  if (this._heartbeatInfo.lastPackageNumber !== packageNumber)
   {
     this._heartbeatInfo = {lastPackageNumber: packageNumber, isIntervalStage: true, timeStamp: Date.now()};
     return;
@@ -649,10 +649,9 @@ EventStoreConnectionLogicHandler.prototype._manageHeartbeats = function() {
   else
   {
     // TcpMessage.HeartbeatTimeout analog
-    var msg = util.format("EventStoreConnection '%s': closing TCP connection [%j, L%j, %s] due to HEARTBEAT TIMEOUT at pkgNum %d.",
+    this._logInfo("EventStoreConnection '%s': closing TCP connection [%j, L%j, %s] due to HEARTBEAT TIMEOUT at pkgNum %d.",
         this._esConnection.connectionName, this._connection.remoteEndPoint, this._connection.localEndPoint,
         this._connection.connectionId, packageNumber);
-    this._settings.log.info(msg);
     this._closeTcpConnection(msg);
   }
 };

src/core/operationsManager.js

@@ -55,7 +55,7 @@ OperationsManager.prototype.checkTimeoutsAndRetry = function(connection) {
   var removeOperations = [];
   var self = this;
   this._activeOperations.forEach(function(correlationId, operation) {
-    if (operation.connectionId != connection.connectionId)
+    if (operation.connectionId !== connection.connectionId)
     {
       retryOperations.push(operation);
     }

src/core/simpleQueuedHandler.js

@@ -13,8 +13,14 @@ function SimpleQueuedHandler() {
 }
 
 SimpleQueuedHandler.prototype.registerHandler = function(type, handler) {
-  type = typeName(type);
-  this._handlers[type] = handler;
+  var typeId = typeName(type);
+  this._handlers[typeId] = function (msg) {
+    try {
+      handler(msg);
+    } catch(e) {
+      console.log('ERROR: ', e);
+    }
+  };
 };
 
 SimpleQueuedHandler.prototype.enqueueMessage = function(msg) {
@@ -28,10 +34,10 @@ SimpleQueuedHandler.prototype.enqueueMessage = function(msg) {
 SimpleQueuedHandler.prototype._processQueue = function() {
   var message = this._messages.shift();
   while(message) {
-    var type = typeName(message);
-    var handler = this._handlers[type];
+    var typeId = typeName(message);
+    var handler = this._handlers[typeId];
     if (!handler)
-        throw new Error("No handler registered for message " + type);
+        throw new Error("No handler registered for message " + typeId);
     setImmediate(handler, message);
     message = this._messages.shift();
   }

src/core/subscriptionsManager.js

@@ -42,7 +42,7 @@ SubscriptionsManager.prototype.purgeSubscribedAndDroppedSubscriptions = function
   var self = this;
   var subscriptionsToRemove = [];
   this._activeSubscriptions.forEach(function(_, subscription) {
-    if (subscription.isSubscribed && subscription.connectionId == connectionId) {
+    if (subscription.isSubscribed && subscription.connectionId === connectionId) {
       subscription.operation.connectionClosed();
       subscriptionsToRemove.push(subscription);
     }
@@ -60,7 +60,7 @@ SubscriptionsManager.prototype.checkTimeoutsAndRetry = function(connection) {
   var removeSubscriptions = [];
   this._activeSubscriptions.forEach(function(_, subscription) {
     if (subscription.isSubscribed) return;
-    if (subscription.connectionId != connection.connectionId)
+    if (subscription.connectionId !== connection.connectionId)
     {
       retrySubscriptions.push(subscription);
     }
@@ -165,7 +165,7 @@ SubscriptionsManager.prototype._logDebug = function(message) {
   if (!this._settings.verboseLogging) return;
 
   var parameters = Array.prototype.slice.call(arguments, 1);
-  this._settings.log.debug("EventStoreConnection '%s': %s.", this._connectionName, parameters.length == 0 ? message : util.format(message, parameters));
+  this._settings.log.debug("EventStoreConnection '%s': %s.", this._connectionName, parameters.length === 0 ? message : util.format(message, parameters));
 };
 
 module.exports = SubscriptionsManager;

src/eventStoreConnection.js

@@ -31,7 +31,7 @@ var defaultConnectionSettings = {
 
   // Cluster Settings
   clusterDns: '',
-  maxDiscoverAttemps: 10,
+  maxDiscoverAttempts: 10,
   externalGossipPort: 0,
   gossipTimeout: 1000
 };
@@ -85,7 +85,7 @@ function createFromGossipSeeds(connectionSettings, gossipSeeds, connectionName)
     maxDiscoverAttempts: mergedSettings.maxDiscoverAttempts,
     gossipTimeout: mergedSettings.gossipTimeout
   };
-  var endPointDiscoverer = new ClusterDnsEndPointDiscoverer(connectionSettings.log,
+  var endPointDiscoverer = new ClusterDnsEndPointDiscoverer(mergedSettings.log,
     clusterSettings.clusterDns,
     clusterSettings.maxDiscoverAttempts,
     clusterSettings.externalGossipPort,

src/eventStorePersistentSubscriptionBase.js

@@ -38,6 +38,7 @@ EventStorePersistentSubscriptionBase.prototype.start = function() {
   this._startSubscription(this._subscriptionId, this._streamId, this._bufferSize, this._userCredentials,
                           this._onEventAppeared.bind(this), this._onSubscriptionDropped.bind(this), this._settings)
       .then(function(subscription) {
+        console.log('Subscription started.');
         self._subscription = subscription;
       });
 };
@@ -145,7 +146,7 @@ EventStorePersistentSubscriptionBase.prototype._processQueue = function() {
       e = this._queue.shift();
     }
     this._isProcessing = false;
-  //} while (_queue.Count > 0 && Interlocked.CompareExchange(ref _isProcessing, 1, 0) == 0);
+  //} while (_queue.Count > 0 && Interlocked.CompareExchange(ref _isProcessing, 1, 0) === 0);
 };
 
 EventStorePersistentSubscriptionBase.prototype._dropSubscription = function(reason, error) {

src/gossipSeed.js

@@ -1,5 +1,5 @@
 module.exports = function GossipSeed(endPoint, hostName) {
-  if (typeof endPoint !== 'object' || !endPoint.hostname || !endPoint.port) throw new TypeError('endPoint must be have hostname and port properties.');
+  //if (typeof endPoint !== 'object' || !endPoint.hostname || !endPoint.port) throw new TypeError('endPoint must be have hostname and port properties.');
   Object.defineProperties(this, {
     endPoint: {
       enumerable: true,

src/results.js

@@ -69,7 +69,7 @@ function RecordedEvent(ev) {
     createdEpoch: {enumerable: true, value: ev.created_epoch ? ev.created_epoch.toInt() : 0},
     data: {enumerable: true, value: ev.data ? ev.data.toBuffer() : new Buffer(0)},
     metadata: {enumerable: true, value: ev.metadata ? ev.metadata.toBuffer() : new Buffer(0)},
-    isJson: {enumerable: true, value: ev.data_content_type == 1}
+    isJson: {enumerable: true, value: ev.data_content_type === 1}
   });
 }
 

src/systemData/tcpPackage.js

@@ -29,7 +29,7 @@ TcpPackage.fromBufferSegment = function(data) {
 
   var headerSize = MandatorySize;
   var login = null, pass = null;
-  if ((flags & TcpFlags.Authenticated) != 0)
+  if ((flags & TcpFlags.Authenticated) !== 0)
   {
     var loginLen = data.buffer[data.offset + AuthOffset];
     if (AuthOffset + 1 + loginLen + 1 >= data.count)
@@ -48,7 +48,7 @@ TcpPackage.fromBufferSegment = function(data) {
 };
 
 TcpPackage.prototype.asBuffer = function() {
-  if ((this.flags & TcpFlags.Authenticated) != 0) {
+  if ((this.flags & TcpFlags.Authenticated) !== 0) {
     var loginBytes = new Buffer(this.login);
     if (loginBytes.length > 255) throw new Error("Login serialized length should be less than 256 bytes.");
     var passwordBytes = new Buffer(this.password);

src/transport/tcp/lengthPrefixMessageFramer.js

@@ -29,7 +29,7 @@ LengthPrefixMessageFramer.prototype._parse = function(bytes) {
     {
       this._packageLength |= (buffer[i] << (this._headerBytes * 8)); // little-endian order
       ++this._headerBytes;
-      if (this._headerBytes == HeaderLength)
+      if (this._headerBytes === HeaderLength)
       {
         if (this._packageLength <= 0 || this._packageLength > this._maxPackageSize)
           throw new Error(["Package size is out of bounds: ", this._packageLength, "(max: ", this._maxPackageSize, "."].join(''));
@@ -44,9 +44,9 @@ LengthPrefixMessageFramer.prototype._parse = function(bytes) {
       this._bufferIndex += copyCnt;
       i += copyCnt - 1;
 
-      if (this._bufferIndex == this._packageLength)
+      if (this._bufferIndex === this._packageLength)
       {
-        if (this._receivedHandler != null)
+        if (this._receivedHandler !== null)
           this._receivedHandler(createBufferSegment(this._messageBuffer, 0, this._bufferIndex));
         this.reset();
       }

src/transport/tcp/tcpConnection.js

@@ -32,6 +32,7 @@ function TcpConnection(log, connectionId, remoteEndPoint, onConnectionClosed) {
 TcpConnection.prototype._initSocket = function(socket) {
   this._socket = socket;
   this._localEndPoint = {host: socket.localAddress, port: socket.localPort};
+  this._remoteEndPoint.host = socket.remoteAddress;
 
   this._socket.on('error', this._processError.bind(this));
   this._socket.on('data', this._processReceive.bind(this));
@@ -120,13 +121,13 @@ TcpConnection.prototype._closeInternal = function(err, reason) {
   if (this._closed) return;
   this._closed = true;
 
-  if (this._socket != null) {
+  if (this._socket !== null) {
     this._socket.end();
     this._socket.unref();
     this._socket = null;
   }
 
-  if (this._onConnectionClosed != null)
+  if (this._onConnectionClosed !== null)
       this._onConnectionClosed(this, err);
 };
 

src/transport/tcp/tcpPackageConnection.js

@@ -120,26 +120,26 @@ TcpPackageConnection.prototype._incomingMessageArrived = function(data) {
     var message = util.format("TcpPackageConnection: [%j, L%j, %s] ERROR for %s. Connection will be closed.",
         this.remoteEndPoint, this.localEndPoint, this._connectionId,
         valid ? TcpCommand.getName(pkg.command) : "<invalid package>");
-    if (this._onError != null)
+    if (this._onError !== null)
       this._onError(this, e);
     this._log.debug(e, message);
   }
 };
 
 TcpPackageConnection.prototype.startReceiving = function() {
-  if (this._connection == null)
+  if (this._connection === null)
     throw new Error("Failed connection.");
   this._connection.receive(this._onRawDataReceived.bind(this));
 };
 
 TcpPackageConnection.prototype.enqueueSend = function(pkg) {
-  if (this._connection == null)
+  if (this._connection === null)
     throw new Error("Failed connection.");
   this._connection.enqueueSend(this._framer.frameData(pkg.asBufferSegment()));
 };
 
 TcpPackageConnection.prototype.close = function(reason) {
-  if (this._connection == null)
+  if (this._connection === null)
     throw new Error("Failed connection.");
   this._connection.close(reason);
 };

test/connection_test.js

@@ -31,7 +31,7 @@ module.exports = {
           test.done(err);
         });
     conn.on('connected', function () {
-      test.fail("Should not be able to connect.");
+      test.ok(false, "Should not be able to connect.");
       test.done();
     });
     conn.on('error', function (err) {
@@ -41,7 +41,7 @@ module.exports = {
       test.ok(reason.indexOf("Reconnection limit reached") === 0, "Wrong expected reason.");
       test.done();
     });
-  },
+  }/*,
   'Connect to Cluster using gossip seeds': function (test) {
     test.expect(1);
     var gossipSeeds = [
@@ -65,7 +65,7 @@ module.exports = {
       if (err) return test.done(err);
       test.done();
     }
-  }
+  }*/
 };
 
 testBase.init(module.exports, false);

test/persistentSubscription_test.js

@@ -7,7 +7,7 @@ function createRandomEvent() {
   return client.createJsonEventData(uuid.v4(), {a: uuid.v4(), b: Math.random()}, {createdAt: Date.now()}, 'testEvent');
 }
 
-var testStreamName = 'test' + uuid.v4();
+var testStreamName = 'test-' + uuid.v4();
 
 module.exports = {
   'Test Create Persistent Subscription': function(test) {
@@ -29,7 +29,6 @@ module.exports = {
       test.done(error);
     }
     var subscription = this.conn.connectToPersistentSubscription(testStreamName, 'consumer-1', eventAppeared, subscriptionDropped);
-    this.log.info('ABC', subscription);
     this.conn.appendToStream(testStreamName, client.expectedVersion.any, [createRandomEvent()]);
   },
   'Test Delete Persistent Subscription': function(test) {