protected void OnReceived(ClusterMessage message)
{
if (Received != null)
{
Received(message);
}
}
/// <summary>
/// Broadcasts a message from this node that it would like to
/// participate in a cluster.
/// </summary>
public override void Send(ClusterMessage message)
{
lock (_udpLock)
{
var packet = message.ToPacket();
_client.Send(packet, packet.Length, _broadcast);
}
}
/// <summary>
/// Sends to all known cluster nodes specifically without using
/// a broadcast.
/// </summary>
public override void SendAll(ClusterMessage message)
{
lock (_udpLock)
{
var packet = message.ToPacket();
foreach (var node in ClusterNetwork.Current.Nodes)
{
_client.Send(packet, packet.Length, Util.NetUtil.CreateIPEndPoint(node.IP, _port));
}
}
}
/// <summary>
/// Sends the host message directly to an IP, in case it can't
/// seem to see the broadcasts.
/// </summary>
public override void Send(string ip, ClusterMessage message)
{
lock (_udpLock)
{
var packet = message.ToPacket();
try
{
_client.Send(packet, packet.Length, Util.NetUtil.CreateIPEndPoint(ip, _port));
}
catch (Exception ex)
{
if (ex != null)
{
}
}
}
}
/// <summary>
/// Receives results from the non-blocking call within
/// StartListening() to raise the Recieved event. Will keep
/// calling StartListening() until the UdpClient is different
/// than the one that called it.
/// </summary>
private void Receive(IAsyncResult ar)
{
IPEndPoint ip;
UdpClient client = null;
try
{
// grab resources now as they might change while blocked
lock (_udpLock)
{
client = ar.AsyncState as UdpClient;
ip = _any;
}
// finish listening for broadcast
byte[] packet = null;
if (client != null)
{
packet = client.EndReceive(ar, ref ip);
}
// send events
if (packet != null)
{
var message = ClusterMessage.Parse(packet);
if (message != null)
{
OnReceived(message);
}
}
}
finally
{
// make sure we keep listening if the port hasn't changed
bool stillOnSamePort;
lock (_udpLock)
{
stillOnSamePort = client == _client;
}
if (stillOnSamePort)
{
StartListening();
}
}
}
/// <summary>
/// Registers a new type from an instance.
/// </summary>
public static void Register(ClusterMessage instance)
{
if (instance == null)
{
return;
}
var messageId = instance.MessageID;
if (messageId == null)
{
return;
}
messageId = messageId.ToLower().Trim();
lock (_types)
{
if (_types.ContainsKey(messageId) == false)
{
_types.Add(messageId, instance.GetType());
}
}
}
public override void Send(string ip, ClusterMessage message)
{
}
public override void SendAll(ClusterMessage message)
{
}
/// <summary> /// Sends the host message directly to an IP, in case it can't /// seem to see the broadcasts. /// </summary> public abstract void Send(string ip, ClusterMessage message);
/// <summary> /// Sends to all known cluster nodes specifically without using /// a broadcast. /// </summary> public abstract void SendAll(ClusterMessage message);
