/// <summary>
/// Create a reference to a grain that we expect to support the broadcast channel consumer extension.
/// </summary>
/// <param name="grainFactory">The grain factory used to get consumer references.</param>
/// <param name="channelId">The channel ID to use for the grain ID construction.</param>
/// <param name="channelSubscriber">The GrainBindings for the grain to create</param>
/// <returns></returns>
private IBroadcastChannelConsumerExtension MakeConsumerReference(
IGrainFactory grainFactory,
InternalChannelId channelId,
BroadcastChannelSubscriber channelSubscriber)
{
var grainId = channelSubscriber.GetGrainId(channelId);
return(grainFactory.GetGrain <IBroadcastChannelConsumerExtension>(grainId));
}
private Cache BuildCache(MajorMinorVersion version, ImmutableDictionary <GrainType, GrainBindings> bindings)
{
var newPredicates = new List <BroadcastChannelSubscriberPredicate>();
foreach (var binding in bindings.Values)
{
foreach (var grainBinding in binding.Bindings)
{
if (!grainBinding.TryGetValue(WellKnownGrainTypeProperties.BindingTypeKey, out var type) ||
!string.Equals(type, WellKnownGrainTypeProperties.BroadcastChannelBindingTypeValue, StringComparison.Ordinal))
{
continue;
}
if (!grainBinding.TryGetValue(WellKnownGrainTypeProperties.BroadcastChannelBindingPatternKey, out var pattern))
{
throw new KeyNotFoundException(
$"Channel binding for grain type {binding.GrainType} is missing a \"{WellKnownGrainTypeProperties.BroadcastChannelBindingPatternKey}\" value");
}
IChannelNamespacePredicate predicate = null;
foreach (var provider in _providers)
{
if (provider.TryGetPredicate(pattern, out predicate))
{
break;
}
}
if (predicate is null)
{
throw new KeyNotFoundException(
$"Could not find an {nameof(IChannelNamespacePredicate)} for the pattern \"{pattern}\"."
+ $" Ensure that a corresponding {nameof(IChannelNamespacePredicateProvider)} is registered");
}
if (!grainBinding.TryGetValue(WellKnownGrainTypeProperties.ChannelIdMapperKey, out var mapperName))
{
throw new KeyNotFoundException(
$"Channel binding for grain type {binding.GrainType} is missing a \"{WellKnownGrainTypeProperties.ChannelIdMapperKey}\" value");
}
var channelIdMapper = _serviceProvider.GetServiceByName <IChannelIdMapper>(string.IsNullOrWhiteSpace(mapperName) ? DefaultChannelIdMapper.Name : mapperName);
var subscriber = new BroadcastChannelSubscriber(binding, channelIdMapper);
newPredicates.Add(new BroadcastChannelSubscriberPredicate(subscriber, predicate));
}
}
return(new Cache(version, newPredicates));
}
public BroadcastChannelSubscriberPredicate(BroadcastChannelSubscriber subscriber, IChannelNamespacePredicate predicate)
{
Subscriber = subscriber;
Predicate = predicate;
}
