/// <summary>
/// Processes a join request from another node
/// </summary>
/// <param name="joinUpdate">The details of the node requesting to join the cluster</param>
private void ProcessJoin(GossipNode joinUpdate) {
try {
//Verify node has valid ID
if (joinUpdate.NodeId == null) {
//TODO: Log Error
return;
}
//Verify it's not already in the registry
GossipNode existingNode = registry.GossipList.FirstOrDefault(n => n.NodeId.Equals(joinUpdate.NodeId));
if (existingNode != null) {
if (existingNode.Status != GossipStatus.Unknown &&
existingNode.Status != GossipStatus.Suspended) {
//TODO: Log Error
return;
}
}
if (string.IsNullOrEmpty(joinUpdate.Partition)) {
//TODO: Log Error
return;
}
joinUpdate.Status = GossipStatus.Active;
joinUpdate.GossipHeartbeats = 0;
joinUpdate.SuspectMatrix = new Dictionary<Guid, bool>();
joinUpdate.UpdateVersion = DateTime.Now.Ticks;
joinUpdate.Suspect = false;
lock (registryLock) {
registry.GossipList.Add(joinUpdate);
}
if (this.OnNodeAdded != null) {
this.OnNodeAdded(this, joinUpdate);
}
} catch (Exception ex) {
//TODO: Log Error
}
}
/// <summary>
/// Processes a leave request from another node
/// </summary>
/// <param name="leaveUpdate">The details of the node requesting to leave the cluster</param>
private void ProcessLeave(GossipNode leaveUpdate) {
// Update status of node to "Suspended"
lock (registryLock) {
var node = registry.GossipList.FirstOrDefault(n => n.NodeId.Equals(leaveUpdate.NodeId));
if (node == null) {
//TODO: Log Error
return;
}
node.Status = GossipStatus.Suspended;
}
if (this.OnNodeSuspended != null) {
this.OnNodeSuspended(this, leaveUpdate);
}
}
private void Init() {
List<string> endpointList = new List<string>();
foreach (IPEndPoint e in listenerAddressList) {
endpointList.Add(string.Format("tcp://{0}:{1}", e.Address.ToString(), e.Port.ToString()));
}
localNode = new GossipNode() {
ClusterKey = clusterKey,
GossipHeartbeats = 0,
ListenerAddressList = endpointList.ToArray(),
NodeId = Guid.NewGuid(),
HostName = Dns.GetHostName(),
Partition = partitionName,
Status = GossipStatus.Active,
Suspect = false,
SuspectMatrix = new Dictionary<Guid, bool>(),
UpdateVersion = DateTime.Now.Ticks
};
//Set node roles
List<string> nodeRoles = new List<string>();
if (!string.IsNullOrEmpty(roles)) {
string[] arrRoles = roles.Split(',');
foreach (string r in arrRoles) {
if (!string.IsNullOrEmpty(r)) {
nodeRoles.Add(r.Trim());
}
}
}
localNode.ClusterRoles = nodeRoles.ToArray();
}