private Uri Select(IList <Uri> addresses, RoundRobinArrayIndex roundRobinIndex, string addressType)
{
var count = addresses.Count;
if (count == 0)
{
LogDebug($"Unable to select {addressType}, no known addresses given.");
return(null);
}
var index = roundRobinIndex.Next(count);
var address = addresses[index];
LogDebug($"Selected {addressType} with address: '{address}' in round-robin fashion.");
return(address);
}
private Uri Select(IList <Uri> addresses, RoundRobinArrayIndex roundRobinIndex, string addressType)
{
var count = addresses.Count;
if (count == 0)
{
_logger.Trace($"Unable to select {addressType}, no known addresses given");
return(null);
}
var index = roundRobinIndex.Next(count);
var address = addresses[index];
_logger.Trace($"Unable to select {addressType}, no known addresses given");
return(address);
}
private Uri Select(IList <Uri> addresses, RoundRobinArrayIndex roundRobinIndex, string forDatabase,
string addressType)
{
var count = addresses.Count;
if (count == 0)
{
LogDebug($"Unable to select {addressType} for database '{forDatabase}', no known addresses given");
return(null);
}
// choose start index for iteration in round-robin fashion
var startIndex = roundRobinIndex.Next(count);
var index = startIndex;
Uri leastConnectedAddress = null;
var leastActiveConnections = Int32.MaxValue;
// iterate over the array to find least connected address
do
{
Uri address = addresses[index];
int inUseConnections = _connectionPool.NumberOfInUseConnections(address);
if (inUseConnections < leastActiveConnections)
{
leastConnectedAddress = address;
leastActiveConnections = inUseConnections;
}
// loop over to the start of the array when end is reached
if (index == count - 1)
{
index = 0;
}
else
{
index++;
}
} while (index != startIndex);
LogDebug(
$"Selected {addressType} for database '{forDatabase}' with least connected address: '{leastConnectedAddress}' and active connections: {leastActiveConnections}");
return(leastConnectedAddress);
}
