/*
* A safe operation to call remote methods of all node in the cluster
* It offers the possibility to exclude the call of the local method
*/
//TODO: incTrack -> NOT WORKING LIKE INTENDED, this is just good for the tracker
private void clusterAction(ClusterHandler onSucess, bool incTrack)
{
List <string> disconected = new List <string>();
foreach (KeyValuePair <string, INode> entry in cluster)
{
INode node = entry.Value;
if (node == null)
{
node = (INode)Activator.GetObject(typeof(INode), entry.Key);
}
this.workThr.AssyncInvoke(() =>
{
try
{
onSucess(node);
}
catch
{
disconect(entry.Key);
}
});
}
if (incTrack)
{
onSucess(this);
}
}
/*
* A safe operation to call remote methods of a specific node.
* Like the alike 'clusterAction()' it automatically handles disconections.
*/
private object nodeAction(ClusterHandler onSucess, string url)
{
object sucess = null;
//Obtain node
INode node = null;
if (url == this.trkUrl)
{
node = this.tracker;
}
else
{
node = cluster[url];
}
//Checks if proxy exists
if (node == null)
{
node = (INode)Activator.GetObject(typeof(INode), url);
}
try
{
sucess = onSucess(node);
}
catch //remote server does not exist
{
//If call failed to tracker then we need a new one
if (url == this.trkUrl)
{
tryPromote();
}
else//If call failed to worker then report to tracker
{
nodeAction((trk) => { trk.disconect(url); return(null); }, this.trkUrl);
}
}
return(sucess);
}
/*
* See clusterAction(ClusterHandler onSucess, bool incTrack)
*/
private void clusterAction(ClusterHandler onSucess)
{
clusterAction(onSucess, true);
}
