public Guid AddDataNode(IDataNodeId descriptor)
{
// Allocate an ID for the data node
var dataNodeGuid = Guid.NewGuid();
// Persist the data node information
_dataNodes[dataNodeGuid] = new DataNodeInfo {
DataNodeId = descriptor, LastUpdateTicks = _timeProvider.Now.Ticks
};
// Return the data node ID
return(dataNodeGuid);
}
// Check if a data node is dead
private bool IsDataNodeDead(DataNodeInfo dn)
{
return(dn.LastUpdateTicks < _timeProvider.Now.AddMilliseconds(-HeartBeatExpireIntervalMilliseconds).Ticks);
}