public void ChannelDisconnected(IRequestResponseChannel channel, string reason)
{
try
{
if (channel != null && ((IDualChannel)channel).ShouldTryReconnecting && _primary != null && _primary.Address.Equals(channel.PeerAddress))
{
if (LoggerManager.Instance.ShardLogger != null && LoggerManager.Instance.ShardLogger.IsInfoEnabled)
{
LoggerManager.Instance.ShardLogger.Info("RemoteShard.ChannelDisconnected.ShoudTryReconnecting", ((IDualChannel)channel).ShouldTryReconnecting.ToString());
}
lock (_onChannel)
{
_remoteShardChannel = null;
}
BrokenConnectionInfo info = new BrokenConnectionInfo();
info.BrokenAddress = channel.PeerAddress;
info.SessionType = SessionTypes.Shard;
_connectionRestoration.RegisterListener(info, this, context.LocalShardName);
}
}
catch (Exception e)
{
if (LoggerManager.Instance.ShardLogger != null && LoggerManager.Instance.ShardLogger.IsErrorEnabled)
{
LoggerManager.Instance.ShardLogger.Error("RemoteShard.ChannelDisconnected()", e.ToString());
}
}
}
/// <summary>
/// Removes the broken connection of the shard from the restoration manager.
/// </summary>
public void RemoveBrokenConnection()
{
if (_primary != null)
{
BrokenConnectionInfo info = new BrokenConnectionInfo
{
BrokenAddress = _primary.Address,
SessionType = SessionTypes.Shard
};
_connectionRestoration.UnregisterListener(info);
}
}
public void ChannelDisconnected(IRequestResponseChannel channel, string reason)
{
try
{
if (_shardChannels != null)
{
bool connected = false;
if (channel != null)
{
Server server = new Server(channel.PeerAddress, Status.Stopped);
Server key = null;
if (_shardChannels != null)
{
IList <Server> shardchannelKeys = _shardChannels.Keys.ToList();
if (server != null && server.Address != null && !server.Address.Equals(context.LocalAddress) && shardchannelKeys != null && shardchannelKeys.Count > 0)
{
foreach (Server node in shardchannelKeys)
{
if (_shardChannels[node].PeerAddress != null && _shardChannels[node].PeerAddress.Equals(channel.PeerAddress))
{
key = node;
break;
}
}
}
IDualChannel tempChannel = channel as IDualChannel;
if (tempChannel != null && key != null && tempChannel.ShouldTryReconnecting)
{
lock (_shardChannels)
{
//_shardChannels[key].Disconnect();
_shardChannels.Remove(key);
if (LoggerManager.Instance.ShardLogger != null &&
LoggerManager.Instance.ShardLogger.IsDebugEnabled)
{
LoggerManager.Instance.ShardLogger.Debug("Localshard.Channeldisconnected(): ",
server.Address.ToString() + " removed from existing channels.");
}
}
if (!key.Address.Equals(context.LocalAddress))
{
BrokenConnectionInfo info = new BrokenConnectionInfo();
info.BrokenAddress = key.Address;
info.SessionType = SessionTypes.Shard;
_connectionRestoration.RegisterListener(info, this, context.LocalShardName);
}
}
}
try
{
if (!connected)
{
IShardListener listener = _shardListeners[Common.MiscUtil.CONFIGURATION_MANAGER];
listener.OnMemberLeft(new Server(channel.PeerAddress, Status.Stopped));
}
}
catch (Exception ex)
{
}
}
}
}
catch (Exception)
{
throw;
}
}
public bool OnMembershipChanged(MembershipChangeArgs args)
{
if (args != null)
{
if (LoggerManager.Instance.ShardLogger != null && LoggerManager.Instance.ShardLogger.IsDebugEnabled)
{
LoggerManager.Instance.ShardLogger.Debug("LocalShard.OnMembershipChanged()", "Membership change type: " + args.ChangeType);
}
switch (args.ChangeType)
{
case MembershipChangeArgs.MembershipChangeType.PrimarySet:
case MembershipChangeArgs.MembershipChangeType.PrimarySelected:
if (args.ServerName != null)
{
if (args.ServerName.Equals(context.LocalAddress))
{
lock (_mutexOnnodeRole)
{
NodeRole = Common.Configuration.Services.NodeRole.Primary;
}
}
else
{
lock (_mutexOnnodeRole)
{
if (NodeRole != NodeRole.Intermediate)
{
NodeRole = Common.Configuration.Services.NodeRole.Secondary;
}
}
}
Primary = new Server(args.ServerName, Status.Running);
if (LoggerManager.Instance.ShardLogger != null && LoggerManager.Instance.ShardLogger.IsInfoEnabled && args.ElectionId != null)
{
LoggerManager.Instance.ShardLogger.Info("LocalShard.OnMembershipChanged()", "This term's election id is: " + args.ElectionId.Id);
}
if (LoggerManager.Instance.ShardLogger != null && LoggerManager.Instance.ShardLogger.IsInfoEnabled)
{
if (args.ChangeType.Equals(MembershipChangeArgs.MembershipChangeType.PrimarySet))
{
LoggerManager.Instance.ShardLogger.Info("LocalShard.OnMembershipChanged()", "Node " + args.ServerName.IpAddress.ToString() + " set as the primary node for the shard.");
}
else if (args.ChangeType.Equals(MembershipChangeArgs.MembershipChangeType.PrimarySelected))
{
LoggerManager.Instance.ShardLogger.Info("LocalShard.OnMembershipChanged()", "Node " + args.ServerName.IpAddress.ToString() + " selected as the primary node for the shard.");
}
}
AppUtil.LogEvent(AppUtil.EventLogSource, string.Format("Node {0} is selected as primary for shard \"{1}\"", args.ServerName.ToString(), context.LocalShardName),
EventLogEntryType.Information, EventCategories.Information, EventID.PrimaySelected);
}
break;
case MembershipChangeArgs.MembershipChangeType.PrimaryLost:
case MembershipChangeArgs.MembershipChangeType.PrimaryDemoted:
case MembershipChangeArgs.MembershipChangeType.NodeLeft:
if (args.ServerName != null && Primary != null && args.ServerName.Equals(Primary.Address))
{
lock (_mutexOnnodeRole)
{
if (NodeRole != NodeRole.Intermediate)
{
NodeRole = Common.Configuration.Services.NodeRole.None;
}
}
Primary = null;
if (args.ServerName != null)
{
if (args.ChangeType.Equals(MembershipChangeArgs.MembershipChangeType.PrimaryDemoted))
{
AppUtil.LogEvent(AppUtil.EventLogSource, string.Format("Primary Node {0} is demoted for shard \"{1}\"", args.ServerName.ToString(), context.LocalShardName),
EventLogEntryType.Warning, EventCategories.Warning, EventID.PrimaryLost);
if (LoggerManager.Instance.ShardLogger != null && LoggerManager.Instance.ShardLogger.IsWarnEnabled)
{
LoggerManager.Instance.ShardLogger.Warn("LocalShard.OnMembershipChanged()", "The primary " + args.ServerName.ToString() + " is demoted.");
}
}
else if (args.ChangeType.Equals(MembershipChangeArgs.MembershipChangeType.PrimaryLost))
{
AppUtil.LogEvent(AppUtil.EventLogSource, string.Format("Connection with the primary node {0} lost \"{1}\"", args.ServerName.ToString(), context.LocalShardName),
EventLogEntryType.Warning, EventCategories.Warning, EventID.PrimaryLost);
if (LoggerManager.Instance.ShardLogger != null && LoggerManager.Instance.ShardLogger.IsWarnEnabled)
{
LoggerManager.Instance.ShardLogger.Warn("LocalShard.OnMembershipChanged()", "The primary " + args.ServerName.ToString() + " is lost.");
}
}
}
}
_clusterConfigMgr.UpdateClusterConfiguration();
if (args.ServerName != null)
{
ShardConfiguration sConfig = null;
if (_clusterConfigMgr != null && _clusterConfigMgr.LatestConfiguration != null && _clusterConfigMgr.LatestConfiguration.Deployment != null)
{
sConfig = _clusterConfigMgr.LatestConfiguration.Deployment.GetShardConfiguration(context.LocalShardName);
}
{
ServerNode node = null;
if (sConfig != null && sConfig.Servers != null)
{
node = sConfig.Servers.GetServerNode(args.ServerName.IpAddress.ToString());
}
if (node == null)
{
if (_connectionRestoration != null)
{
BrokenConnectionInfo info = new BrokenConnectionInfo();
info.BrokenAddress = args.ServerName;
info.SessionType = SessionTypes.Shard;
_connectionRestoration.UnregisterListener(info);
}
}
}
}
break;
case MembershipChangeArgs.MembershipChangeType.TimeoutOnRestrictedPrimary:
return(_membershipManager.AbortTakeoverMechanismTask(args));
case MembershipChangeArgs.MembershipChangeType.ForcefullyDemotePrimary:
return(_membershipManager.OnForcefulPrimaryDemotion(args));
}
if (_membershipManager != null)
{
_membershipManager.UpdateLocalMembership(args);
if (context != null && context.DatabasesManager != null &&
(args.ChangeType == MembershipChangeArgs.MembershipChangeType.PrimarySet ||
(args.ChangeType == MembershipChangeArgs.MembershipChangeType.PrimarySelected)))
{
context.DatabasesManager.ElectionResult = _membershipManager.LatestMembership.ElectionId;
context.ElectionResult = new ElectionResult();
context.ElectionResult.ElectionId = _membershipManager.LatestMembership.ElectionId;
}
DatabaseMessage primaryChangedMessage = new DatabaseMessage();
primaryChangedMessage.OpCode = OpCode.PrimaryChanged;
IShardListener listener = _shardListeners[Common.MiscUtil.CLUSTER_MANAGER];
listener.OnMessageReceived(primaryChangedMessage, new Server(context.LocalAddress, Status.Running));
}
}
return(false);
}
public void OnPrimaryChanged(ServerInfo newPrimary, int port)
{
//RTD: review
if ((newPrimary == null && _primary != null) ||
(newPrimary != null && _primary != null && !this._primary.Address.Equals(newPrimary.Address)))
{
BrokenConnectionInfo info = new BrokenConnectionInfo();
info.BrokenAddress = _primary.Address;
info.SessionType = SessionTypes.Shard;
_connectionRestoration.UnregisterListener(info);
}
Address primaryAddress = null;
if (newPrimary != null && newPrimary.Address != null)
{
primaryAddress = new Address(newPrimary.Address.IpAddress, port);
}
ConnectPrimary(primaryAddress);
//// If primary is null, it means the respective shard has no primary anymore so
//if (newPrimary == null)
//{
// if (_remoteShardChannel != null)
// {
// ((DualChannel)_remoteShardChannel).ShouldTryReconnecting = false;
// _remoteShardChannel.Disconnect();
// _remoteShardChannel = null;
// }
//}
//else
//{
// if (_remoteShardChannel != null)
// {
// if (_remoteShardChannel.PeerAddress.Equals(newPrimary) && ((IDualChannel)this._remoteShardChannel).Connected)
// return;
// }
// bool isConnected = false;
// IRequestResponseChannel channel = factory.GetChannel(newPrimary.Address.IpAddress.ToString(), _shardPort, context.LocalAddress.IpAddress.ToString(), SessionTypes.Shard, _traceProvider, _channelFormatter);
// try
// {
// isConnected = channel.Connect(false);
// }
// catch (ChannelException e)
// {
// if (LoggerManager.Instance.ShardLogger != null && LoggerManager.Instance.ShardLogger.IsErrorEnabled)
// LoggerManager.Instance.ShardLogger.Error("Error: RemoteShard.OnPrimaryChanged()", e.ToString());
// }
// //catch (Exception ex)
// //{
// // if (LoggerManager.Instance.ShardLogger != null && LoggerManager.Instance.ShardLogger.IsErrorEnabled)
// // LoggerManager.Instance.ShardLogger.Error("Error: RemoteShard.OnPrimaryChanged()", e.ToString());
// //}
// if (isConnected)
// {
// SessionInfo info = new SessionInfo();
// info.Cluster = this.Context.ClusterName;
// info.Shard = this.Context.LocalShardName;
// channel.SendMessage(info, true);
// lock (_onChannel)
// {
// _remoteShardChannel = _resolveDispute.GetValidChannel(_resolveDispute.SetConnectInfo(channel as IDualChannel, ConnectInfo.ConnectStatus.CONNECT_FIRST_TIME), _remoteShardChannel);
// ((IDualChannel)_remoteShardChannel).StartReceiverThread();
// ((IDualChannel)_remoteShardChannel).RegisterRequestHandler(this);
// }
// lock (_onPrimary)
// {
// _primary = new Server(new Address(newPrimary.Address.IpAddress.ToString(), port), Status.Running);
// }
// }
//}
}
public bool OnSessionEstablished(Session session)
{
// check if the shardConnected event is required to be raised
bool shardConnected = false;
Server server = new Server(new Common.Net.Address(session.IP.ToString(), this._shardPort), Status.Initializing);
IRequestResponseChannel channel = factory.GetChannel(session.Connection, session.IP.ToString(), this._shardPort, context.LocalAddress.ToString(), SessionTypes.Shard, _traceProvider, _channelFormatter);
LoggerManager.Instance.SetThreadContext(new LoggerContext()
{
ShardName = _name != null ? _name : "", DatabaseName = ""
});
try
{
if (_remoteShardChannel != null && !((IDualChannel)_remoteShardChannel).Connected && _remoteShardChannel.PeerAddress.Equals(server))
{
session.Connection.Disconnect();
//throw new ChannelException("already connected with shard"+_name);
}
if (channel.Connect(false))
{
ConnectInfo.ConnectStatus status = ConnectInfo.ConnectStatus.CONNECT_FIRST_TIME;
if (_remoteShardChannel != null && _remoteShardChannel.PeerAddress.Equals(server.Address))
{
status = ConnectInfo.ConnectStatus.RECONNECTING;
}
lock (_onChannel)
{
_remoteShardChannel = _resolveDispute.GetValidChannel(_resolveDispute.SetConnectInfo(channel as IDualChannel, status), _remoteShardChannel);
((IDualChannel)_remoteShardChannel).StartReceiverThread();
((IDualChannel)_remoteShardChannel).RegisterRequestHandler(this);
shardConnected = true;
}
if (_primary != null && !_primary.Address.Equals(server.Address))
{
BrokenConnectionInfo info = new BrokenConnectionInfo();
info.BrokenAddress = _primary.Address;
info.SessionType = SessionTypes.Shard;
_connectionRestoration.UnregisterListener(info);
}
lock (_onPrimary)
{
_primary = server;
}
if (LoggerManager.Instance.ShardLogger != null && LoggerManager.Instance.ShardLogger.IsInfoEnabled)
{
LoggerManager.Instance.ShardLogger.Info("RemoteShard.OnSessionEstd()", "Session of the shard " + _name + " estd successfully");
}
return(IsStarted = true);
}
else
{
return(false);
}
}
catch (ChannelException e)
{
if (LoggerManager.Instance.ShardLogger != null && LoggerManager.Instance.ShardLogger.IsErrorEnabled)
{
LoggerManager.Instance.ShardLogger.Error("Error: RemoteShard.OnSessionEstd()", e.ToString());
}
return(false);
}
finally
{
if (shardConnected)
{
ShardConnected();
}
}
}
