internal object DiscoverChannel(DiscoveredEndpointModel model, IChannelBuilderScope scope)
{
var discovered = PerformEndpointSearch(scope.Contract, model);
if (discovered == null || discovered.Endpoints.Count == 0)
{
throw new EndpointNotFoundException(string.Format(
"Unable to discover the endpoint for contract {0}. " +
"Either no service exists or it does not support discovery.",
scope.Contract.FullName));
}
var binding = model.Binding;
var endpointMetadata = discovered.Endpoints[0];
if (discovered.Endpoints.Count > 1 && model.EndpointPreference != null)
{
endpointMetadata = model.EndpointPreference(discovered.Endpoints);
if (endpointMetadata == null)
{
throw new EndpointNotFoundException(string.Format(
"More than one endpoint was discovered for contract {0}. " +
"However, an endpoint was not selected. This is most likely " +
"a bug with the user-defined endpoint preference.",
scope.Contract.FullName));
}
}
if (binding == null && model.DeriveBinding == false)
{
binding = GetBindingFromMetadata(endpointMetadata);
}
var address = endpointMetadata.Address;
if (model.Identity != null)
{
address = new EndpointAddress(address.Uri, model.Identity, address.Headers);
}
binding = GetEffectiveBinding(binding, address.Uri);
var channel = scope.GetChannel(scope.Contract, binding, address)();
if (channel is IContextChannel)
{
var metadata = new DiscoveredEndpointMetadata(endpointMetadata);
((IContextChannel)channel).Extensions.Add(metadata);
}
return channel;
}
private void DiscoverEndpoint(DiscoveryEndpoint discoveryEndpoint, DiscoveredEndpointModel model)
{
using (var discover = new DiscoveryClient(discoveryEndpoint))
{
var criteria = CreateSearchCriteria(model);
var discovered = discover.Find(criteria);
if (discovered.Endpoints.Count > 0)
{
var binding = model.Binding;
var endpointMetadata = discovered.Endpoints[0];
if (discovered.Endpoints.Count > 1 && model.EndpointPreference != null)
{
endpointMetadata = model.EndpointPreference(discovered.Endpoints);
if (endpointMetadata == null)
{
throw new EndpointNotFoundException(string.Format(
"More than one endpoint was discovered for contract {0}. " +
"However, an endpoint could be selected. This is most likely " +
"a bug with the user-defined endpoint prefeence.",
contract.FullName));
}
}
if (binding == null && model.DeriveBinding == false)
{
binding = GetBindingFromMetadata(endpointMetadata);
}
var address = endpointMetadata.Address;
if (model.Identity != null)
{
address = new EndpointAddress(address.Uri, model.Identity, address.Headers);
}
binding = GetEffectiveBinding(binding, address.Uri);
var innerCreator = GetChannel(contract, binding, address);
channelCreator = () =>
{
var channel = (IChannel)innerCreator();
if (channel is IContextChannel)
{
var metadata = new DiscoveredEndpointMetadata(endpointMetadata);
((IContextChannel)channel).Extensions.Add(metadata);
}
return channel;
};
}
else
{
throw new EndpointNotFoundException(string.Format(
"Unable to discover the endpoint for contract {0}. " +
"Either no service exists or it does not support discovery.",
contract.FullName));
}
}
}
