public void ExecuteTransaction(Action <MessageExchangeProtocol> protocolHandler)
{
var retryInterval = ServiceEndpoint.RetryListeningSleepInterval;
Exception lastError = null;
// retryAllowed is also used to indicate if the error occurred before or after the connection was made
var retryAllowed = true;
var watch = Stopwatch.StartNew();
for (var i = 0; i < ServiceEndpoint.RetryCountLimit && retryAllowed && watch.Elapsed < ServiceEndpoint.ConnectionErrorRetryTimeout; i++)
{
if (i > 0)
{
Thread.Sleep(retryInterval);
log.Write(EventType.Error, "Retry attempt {0}", i);
}
try
{
lastError = null;
IConnection connection = null;
try
{
connection = connectionManager.AcquireConnection(new WebSocketConnectionFactory(clientCertificate), serviceEndpoint, log);
// Beyond this point, we have no way to be certain that the server hasn't tried to process a request; therefore, we can't retry after this point
retryAllowed = false;
protocolHandler(connection.Protocol);
}
catch
{
connection?.Dispose();
throw;
}
// Only return the connection to the pool if all went well
connectionManager.ReleaseConnection(serviceEndpoint, connection);
}
catch (AuthenticationException aex)
{
lastError = aex;
retryAllowed = false;
}
catch (WebSocketException wse) when(wse.Message == "Unable to connect to the remote server")
{
lastError = wse;
retryAllowed = false;
}
catch (WebSocketException wse)
{
lastError = wse;
// When the host is not found or reset the connection an immediate retry isn't going to help
if ((wse.InnerException?.Message.StartsWith("The remote name could not be resolved:") ?? false) ||
(wse.InnerException?.IsSocketConnectionReset() ?? false) ||
wse.IsSocketConnectionReset())
{
retryAllowed = false;
}
else
{
log.Write(EventType.Error, $"Socket communication error with connection to {serviceEndpoint.Format()}");
}
}
catch (ConnectionInitializationFailedException cex)
{
log.WriteException(EventType.Error, $"Connection initialization failed while connecting to {serviceEndpoint.Format()}", cex);
lastError = cex;
retryAllowed = true;
// If this is the second failure, clear the pooled connections as a precaution
// against all connections in the pool being bad
if (i == 1)
{
connectionManager.ClearPooledConnections(serviceEndpoint, log);
}
}
catch (Exception ex)
{
log.WriteException(EventType.Error, "Unexpected exception executing transaction.", ex);
lastError = ex;
}
}
HandleError(lastError, retryAllowed);
}
