public IConnection AcquireConnection(AccessMode mode)
{
_routingTableManager.EnsureRoutingTableForMode(mode);
while (true)
{
Uri uri;
switch (mode)
{
case AccessMode.Read:
uri = _loadBalancingStrategy.SelectReader(_routingTableManager.RoutingTable.Readers);
break;
case AccessMode.Write:
uri = _loadBalancingStrategy.SelectWriter(_routingTableManager.RoutingTable.Writers);
break;
default:
throw new InvalidOperationException($"Unknown access mode {mode}");
}
if (uri == null)
{
// no server known to routingTable
break;
}
IConnection conn = CreateClusterConnection(uri, mode);
if (conn != null)
{
return(conn);
}
//else connection already removed by clusterConnection onError method
}
throw new SessionExpiredException($"Failed to connect to any {mode.ToString().ToLower()} server.");
}
public async Task <IConnection> AcquireConnectionAsync(AccessMode mode, string database, Bookmark bookmark)
{
var routingTable = await _routingTableManager.EnsureRoutingTableForModeAsync(mode, database, bookmark)
.ConfigureAwait(false);
while (true)
{
Uri uri;
switch (mode)
{
case AccessMode.Read:
uri = _loadBalancingStrategy.SelectReader(routingTable.Readers, database);
break;
case AccessMode.Write:
uri = _loadBalancingStrategy.SelectWriter(routingTable.Writers, database);
break;
default:
throw new InvalidOperationException($"Unknown access mode {mode}");
}
if (uri == null)
{
// no server known to routingTable
break;
}
var conn =
await CreateClusterConnectionAsync(uri, mode, database, bookmark).ConfigureAwait(false);
if (conn != null)
{
return(conn);
}
//else connection already removed by clusterConnection onError method
}
throw new SessionExpiredException($"Failed to connect to any {mode.ToString().ToLower()} server.");
}
