/*
* Constructor a node and adds it to the provided cluster.
*/
public Node(int id, int port, bool ensureSecurity, string clusterURL)
: this(id, port, ensureSecurity)
{
INode cluster = (INode)Activator.GetObject(typeof(INode), clusterURL);
Console.WriteLine("Joining cluster @ " + clusterURL);
ClusterReport report = null;
//Attempt to join the cluster
int attempts = 3;
while (attempts != 0)
{
attempts--;
report = cluster.join(this.URL);
if (report != null)
{
break;
}
Console.WriteLine("Retrying...");
}
//Check for valid cluster's answer
if (report == null)
{
Console.WriteLine("Failed to joining cluster @ " + clusterURL);
return;
}
string trackerURL = report.Tracker;
//Check if we started the connection with the tracker or a random node
if (trackerURL != clusterURL)
{
this.tracker = (INode)Activator.GetObject(typeof(INode), trackerURL);
this.trkUrl = trackerURL;
}
else
{
this.tracker = cluster;
this.trkUrl = clusterURL;
}
Console.WriteLine("Joined cluster @ " + this.trkUrl);
//Updates the current view with the cluster's one
List <string> clus = new List <string>(report.Cluster);
foreach (string s in clus)
{
if (s != this.URL)
{
onClusterIncrease(s);
}
}
}
/*
* Receives a Node's URL and adds it to the cluster.
* It also returns information about all nodes on this cluster and the active tracker
*/
public ClusterReport join(string nodeUrl)
{
if (this.IsTracker)
{
//Creates node's proxy
INode newPeer = (INode)Activator.GetObject(typeof(INode), nodeUrl);
//Tell cluster to add this new node
clusterAction((node) => { node.onClusterIncrease(nodeUrl); return(null); });
//Prepares cluster's view
ClusterReport report = new ClusterReport();
report.View = 1;//No use as for now
report.Tracker = this.URL;
report.Cluster = new List <string>(this.cluster.Keys);
return(report);
}
else
{
return((ClusterReport)nodeAction((trk) => { return trk.join(nodeUrl); }, this.trkUrl));
}
}