private static bool QueryService(ILogger logger, string host, int port, string serviceName,
string[] requiredContracts, int maxRoundTrips, out Int64 bestRoundTrip)
{
bestRoundTrip = TimeSpan.FromSeconds(30).Ticks;
AddressBinding addressBinding = WcfHelper.CreateAddressBinding(
WcfConst.NetTcp, host, port, serviceName, typeof(IDiscoverV111).Name);
try
{
using (var client = new DiscoverSenderV111(addressBinding))
{
// query service n times to find best round trip
int loop = 0;
while (loop < maxRoundTrips)
{
DateTimeOffset clientTime1 = DateTimeOffset.Now;
V111DiscoverReply reply = client.DiscoverServiceV111();
// fail if server does not support required contracts
if (requiredContracts != null)
{
foreach (string requiredContract in requiredContracts)
{
if (reply.SupportedContracts == null)
{
logger.LogDebug("Server ({0}) does not support contract: '{1}'", addressBinding.Address.Uri.AbsoluteUri, requiredContract);
return(false);
}
bool supportsContract = false;
foreach (string supportedContract in reply.SupportedContracts)
{
if (supportedContract == requiredContract)
{
supportsContract = true;
}
}
if (!supportsContract)
{
logger.LogDebug("Server ({0}) does not support contract: '{1}'", addressBinding.Address.Uri.AbsoluteUri, requiredContract);
return(false);
}
}
}
// all required contracts supported
DateTimeOffset clientTime2 = DateTimeOffset.Now;
Int64 roundTrip = clientTime2.Ticks - clientTime1.Ticks;
if ((roundTrip >= 0) && (roundTrip < bestRoundTrip))
{
bestRoundTrip = roundTrip;
}
// loop
loop++;
}
//logger.LogDebug("Server ({0}) answered ({1} ticks)", addressBinding.Address.Uri.AbsoluteUri, bestRoundTrip);
return(true);
}
}
catch (EndpointNotFoundException)
{
//logger.LogDebug("Server ({0}) not answering.", addressBinding.Address.Uri.AbsoluteUri);
return(false);
}
catch (CommunicationObjectFaultedException)
{
//logger.LogDebug("Server ({0}) not answering.", addressBinding.Address.Uri.AbsoluteUri);
return(false);
}
//catch (Exception excp)
//{
// logger.LogError("Server ({0}) threw exception: {1}", addressBinding.Address.Uri.AbsoluteUri, excp);
// return false;
//}
}
public DiscoverSenderV111(AddressBinding addressBinding)
: base(addressBinding)
{
}
public CustomClientBase(AddressBinding addressBinding)
: base(addressBinding.Binding, addressBinding.Address)
{
}
/// <summary>
///
/// </summary>
/// <param name="addressBinding"></param>
public SessCtrlSenderV131(AddressBinding addressBinding)
: base(addressBinding)
{
}
public TransferSenderV341(AddressBinding addressBinding)
: base(addressBinding)
{
}
