private ICollection <string> ResolveRacks(IList <string> nodes)
{
ICollection <string> racks = new HashSet <string>();
if (nodes != null)
{
foreach (string node in nodes)
{
// Ensure node requests are accompanied by requests for
// corresponding rack
string rack = RackResolver.Resolve(node).GetNetworkLocation();
if (rack == null)
{
Log.Warn("Failed to resolve rack for node " + node + ".");
}
else
{
racks.AddItem(rack);
}
}
}
return(racks);
}
/// <summary>resolving the network topology.</summary>
/// <param name="hostName">the hostname of this node.</param>
/// <returns>
/// the resolved
/// <see cref="Org.Apache.Hadoop.Net.Node"/>
/// for this nodemanager.
/// </returns>
public static Node Resolve(string hostName)
{
return(RackResolver.Resolve(hostName));
}