public async Task HandleAsync(
IServiceDiscoveryRequest request,
IClientConnection sourceConnection,
ITransportChannel sourceChannel)
{
IReadOnlyCollection <(IConsumedMethod Consumed, IProvidedMethod Provided)> methodMatches;
if (request.ConsumedService.HasValue)
{
methodMatches = _registryService.GetMethodMatches(
sourceConnection.Info.ApplicationId,
request.ConsumedService.Value);
}
else
{
methodMatches = _registryService.GetMethodMatches(sourceConnection.Info.ApplicationId);
}
IEnumerable <IGrouping <(IConsumedService ConsumedService, IProvidedService ProvidedService, Maybe <UniqueId> ConnectionId), IProvidedMethod> > groupedMethods;
if (request.DiscoveryMode == DiscoveryMode.Offline)
{
groupedMethods = methodMatches
.GroupBy(
x => (
x.Consumed.ConsumedService,
x.Provided.ProvidedService,
ConnectionId: Maybe <UniqueId> .Nothing),
x => x.Provided);
}
else
{
var onlineConnections = _connectionTracker.GetOnlineConnections();
groupedMethods = methodMatches
.Join(onlineConnections, x => x.Provided.ProvidedService.Application.Id, y => y.Info.ApplicationId, (x, y) => (Match: x, ConnectionId: y.Id))
.GroupBy(
x => (
x.Match.Consumed.ConsumedService,
x.Match.Provided.ProvidedService,
new Maybe <UniqueId>(x.ConnectionId)),
x => x.Match.Provided);
}
var discoveredServices =
from s in groupedMethods
let consumedService = s.Key.ConsumedService
let providedService = s.Key.ProvidedService
let connectionId = s.Key.ConnectionId
select _protocol.MessageFactory.CreateDiscoveredService(
_protocol.MessageFactory.CreateConsumedServiceReference(
consumedService.Service.Id,
consumedService.Alias),
_protocol.MessageFactory.CreateProvidedServiceReference(
providedService.Service.Id,
providedService.Alias,
providedService.Application.Id,
connectionId),
s.Key.ProvidedService.Title,
s.Select(m =>
_protocol.MessageFactory.CreateDiscoveredServiceMethod(
m.Method.Name,
m.Title,
m.Method.InputMessage.Id,
m.Method.OutputMessage.Id,
Convert(m.Method.Type))).ToList());
using (var response = _protocol.MessageFactory.CreateServiceDiscoveryResponse(discoveredServices.ToList()))
{
Log.Info("Completed service discovery request {{{0}}} from {{{1}}}: {2}", request, sourceConnection, response);
var serializedResponse = _protocol.Serializer.Serialize(response);
try
{
await sourceChannel.Out
.WriteAsync(new TransportMessageFrame(serializedResponse))
.ConfigureAwait(false);
}
catch
{
serializedResponse.Dispose();
throw;
}
}
}
