private void ApolloClient_SubscriptionRouteRemoved(object sender, ApolloSubscriptionFieldEventArgs e)
{
var client = sender as ApolloClientProxy <TSchema>;
if (client == null)
{
return;
}
var names = SubscriptionEventName.FromGraphField(_schema, e.Field);
foreach (var name in names)
{
lock (_syncLock)
{
if (_subCountByName.TryGetValue(name, out var clients))
{
if (clients.Contains(client))
{
clients.Remove(client);
if (clients.Count == 0)
{
_subCountByName.Remove(name);
_eventRouter.RemoveReceiver(name, this);
_logger?.EventMonitorEnded(name);
}
}
}
}
}
}
private void ApolloClient_SubscriptionRouteAdded(object sender, ApolloSubscriptionFieldEventArgs e)
{
var client = sender as ApolloClientProxy <TSchema>;
if (client == null)
{
return;
}
var names = SubscriptionEventName.FromGraphField(_schema, e.Field);
foreach (var name in names)
{
lock (_syncLock)
{
if (!_subCountByName.ContainsKey(name))
{
_subCountByName.Add(name, new HashSet <ApolloClientProxy <TSchema> >());
}
_subCountByName[name].Add(client);
if (_subCountByName[name].Count == 1)
{
_eventRouter.AddReceiver(name, this);
_logger?.EventMonitorStarted(name);
}
}
}
}
/// <summary>
/// Attempts to generate a dictionary of value relating field path to the possible event names.
/// </summary>
/// <param name="schema">The schema.</param>
/// <returns>Dictionary<System.String, GraphFieldPath>.</returns>
public static Dictionary <SubscriptionEventName, GraphFieldPath> CreateEventMap(ISchema schema)
{
var dic = new Dictionary <SubscriptionEventName, GraphFieldPath>(SubscriptionEventNameEqualityComparer.Instance);
if (schema == null || !schema.OperationTypes.ContainsKey(GraphCollection.Subscription))
{
return(dic);
}
foreach (var field in schema.KnownTypes.OfType <IObjectGraphType>()
.SelectMany(x => x.Fields.OfType <ISubscriptionGraphField>()))
{
var route = field.Route.Clone();
foreach (var eventName in SubscriptionEventName.FromGraphField(schema, field))
{
if (dic.ContainsKey(eventName))
{
var path = dic[eventName];
throw new DuplicateNameException(
$"Duplciate Subscription Event Name. Unable to register the field '{route.Path}' " +
$"with event name '{eventName}'. The schema '{schema.GetType().FriendlyName()}' already contains " +
$"a field with the event name '{eventName}'. (Event Owner: {path.Path}).");
}
dic.Add(eventName, route);
}
}
return(dic);
}
