/// <summary>
/// Refresh projection nodes.
/// </summary>
/// <returns>Nodes.</returns>
private IList <IClusterNode> RefreshNodes()
{
long oldTopVer = Interlocked.Read(ref _topVer);
List <IClusterNode> newNodes = null;
DoOutInOp(OpNodes, writer =>
{
writer.WriteLong(oldTopVer);
}, input =>
{
PortableReaderImpl reader = Marshaller.StartUnmarshal(input);
if (reader.ReadBoolean())
{
// Topology has been updated.
long newTopVer = reader.ReadLong();
newNodes = IgniteUtils.ReadNodes(reader, _pred);
UpdateTopology(newTopVer, newNodes);
}
});
if (newNodes != null)
{
return(newNodes);
}
// No topology changes.
Debug.Assert(_nodes != null, "At least one topology update should have occurred.");
return(_nodes);
}
