public Tuple <INatsConnection, IList <IOp> > OpenConnection(ConnectionInfo connectionInfo, CancellationToken cancellationToken)
{
EnsureArg.IsNotNull(connectionInfo, nameof(connectionInfo));
if (cancellationToken.IsCancellationRequested)
{
throw NatsException.CouldNotEstablishAnyConnection();
}
var hosts = new Queue <Host>(connectionInfo.Hosts.GetRandomized());
while (!cancellationToken.IsCancellationRequested && hosts.Any())
{
var host = hosts.Dequeue();
try
{
return(EstablishConnection(
host,
connectionInfo,
cancellationToken));
}
catch (Exception ex)
{
Logger.Error($"Error while connecting to {host}. Trying with next host (if any).", ex);
}
}
throw NatsException.CouldNotEstablishAnyConnection();
}
public async Task <(INatsConnection connection, IList <IOp> consumedOps)> OpenConnectionAsync(
ConnectionInfo connectionInfo,
CancellationToken cancellationToken)
{
if (connectionInfo == null)
{
throw new ArgumentNullException(nameof(connectionInfo));
}
cancellationToken.ThrowIfCancellationRequested();
var hosts = new Queue <Host>(connectionInfo.Hosts.GetRandomized()); //TODO: Rank
bool ShouldTryAndConnect() => !cancellationToken.IsCancellationRequested && hosts.Any();
while (ShouldTryAndConnect())
{
var host = hosts.Dequeue();
try
{
return(await EstablishConnectionAsync(
host,
connectionInfo,
cancellationToken).ConfigureAwait(false));
}
catch (Exception ex)
{
Logger.Error($"Error while connecting to {host}. Trying with next host (if any).", ex);
if (!ShouldTryAndConnect())
{
throw;
}
}
}
throw NatsException.CouldNotEstablishAnyConnection();
}
