public bool CanAcceptCalls()
{
if (!TryGetHealthClient(out Health.HealthClient healthClient))
{
return(false);
}
string serviceName = ChannelServiceName;
bool result = GrpcUtils.IsServing(healthClient, serviceName, out StatusCode statusCode);
_msg.DebugFormat("Service {0} is serving at {1}: {2}. Status: {3}", serviceName,
Channel?.ResolvedTarget, result, statusCode);
return(result);
}
private static bool IsServingLoadBalancerEndpoint(
[NotNull] Channel channel,
[NotNull] ChannelCredentials credentials,
string serviceName,
int enoughForLargeGeometries)
{
var channelHealth = new Health.HealthClient(channel);
bool isServingEndpoint = GrpcUtils.IsServing(channelHealth, serviceName, out _);
if (isServingEndpoint)
{
return(false);
}
bool isLoadBalancer = GrpcUtils.IsServing(channelHealth, nameof(ServiceDiscoveryGrpc),
out StatusCode lbStatusCode);
if (isLoadBalancer)
{
_msg.DebugFormat("{0} is a load balancer address.", channel.ResolvedTarget);
Channel suggestedLocation =
TryGetChannelFromLoadBalancer(channel, credentials, serviceName,
enoughForLargeGeometries);
if (suggestedLocation != null)
{
_msg.DebugFormat("Using serving load balancer at {0}", channel.ResolvedTarget);
return(true);
}
// Assumption: A load balancer is never also serving real requests -> lets not use it at all!
_msg.Debug(
"The load balancer has no service locations available. It will not be used.");
return(false);
}
_msg.DebugFormat("No {0} service and no serving load balancer at {1}. Error code: {2}",
serviceName, channel.ResolvedTarget, lbStatusCode);
return(false);
}
