/// <summary>
/// Creates an invalid instance of the given reactive entity kind with the given URI.
/// </summary>
/// <param name="uri">The URI.</param>
/// <param name="kind">The reactive entity kind.</param>
/// <returns>
/// The invalid instance, or null if an unexpected kind is provided.
/// </returns>
public static ReactiveEntity CreateInvalidInstance(Uri uri, ReactiveEntityKind kind)
{
return(kind switch
{
ReactiveEntityKind.Observable => ObservableDefinitionEntity.CreateInvalidInstance(uri),
ReactiveEntityKind.Observer => ObserverDefinitionEntity.CreateInvalidInstance(uri),
ReactiveEntityKind.Stream => SubjectEntity.CreateInvalidInstance(uri),
ReactiveEntityKind.StreamFactory => StreamFactoryDefinitionEntity.CreateInvalidInstance(uri),
ReactiveEntityKind.Subscription => SubscriptionEntity.CreateInvalidInstance(uri),
ReactiveEntityKind.ReliableSubscription => ReliableSubscriptionEntity.CreateInvalidInstance(uri),
ReactiveEntityKind.Template or ReactiveEntityKind.Other => OtherDefinitionEntity.CreateInvalidInstance(uri),
_ => null,
});
public bool TryLookupObservable(IReactiveMetadata metadata, string key, out ObservableDefinitionEntity entity)
{
if (metadata.Observables.TryGetValue(new Uri(key), out IReactiveObservableDefinition observableDefinition))
{
var expression = _metadataRewrites.GetValue(
observableDefinition.Expression,
e => _queryEngine.RewriteQuotedReactiveToSubscribable(e));
entity = new ObservableDefinitionEntity(observableDefinition.Uri, expression, observableDefinition.State);
return(true);
}
// Will result in a stream being created if a definition exists
// in the remote metadata store. This path should only succeed
// when hit by the definition inlining binder.
if (TryCreateStreamFromMetadata(metadata, key, out var subject))
{
entity = ObservableDefinitionEntity.FromSubject(subject);
return(true);
}
entity = null;
return(false);
}
private void AddEntityPlaceholder(ReactiveEntityKind kind, string key)
{
var uri = new Uri(key);
#pragma warning disable IDE0079 // Remove unnecessary suppression.
#pragma warning disable CA2000 // Dispose objects before losing scope. (Entities are owned by the registry.)
var added = kind switch
{
ReactiveEntityKind.Observable => Registry.Observables.TryAdd(key, ObservableDefinitionEntity.CreateInvalidInstance(uri)),
ReactiveEntityKind.Observer => Registry.Observers.TryAdd(key, ObserverDefinitionEntity.CreateInvalidInstance(uri)),
ReactiveEntityKind.Stream => Registry.Subjects.TryAdd(key, SubjectEntity.CreateInvalidInstance(uri)),
ReactiveEntityKind.StreamFactory => Registry.SubjectFactories.TryAdd(key, StreamFactoryDefinitionEntity.CreateInvalidInstance(uri)),
ReactiveEntityKind.SubscriptionFactory => Registry.SubscriptionFactories.TryAdd(key, SubscriptionFactoryDefinitionEntity.CreateInvalidInstance(uri)),
ReactiveEntityKind.Subscription => Registry.Subscriptions.TryAdd(key, SubscriptionEntity.CreateInvalidInstance(uri)),
ReactiveEntityKind.ReliableSubscription => Registry.ReliableSubscriptions.TryAdd(key, ReliableSubscriptionEntity.CreateInvalidInstance(uri)),
ReactiveEntityKind.Other => Registry.Other.TryAdd(key, OtherDefinitionEntity.CreateInvalidInstance(uri)),
ReactiveEntityKind.Template => Registry.Templates.TryAdd(key, OtherDefinitionEntity.CreateInvalidInstance(uri)),
_ => throw new InvalidOperationException(string.Format(CultureInfo.InvariantCulture, "Cannot create an invalid entity '{0}' of type '{1}'.", key, kind)),
};
#pragma warning restore CA2000
#pragma warning restore IDE0079
if (added)
{
Parent.TraceSource.Registry_AddEntityPlaceholder(Parent.Uri, kind.ToString(), key);
}
}
public BuiltinEntitiesRegistry(CheckpointingQueryEngine queryEngine, IReactiveMetadata metadata)
{
Debug.Assert(queryEngine != null);
Debug.Assert(metadata != null);
_queryEngine = queryEngine;
_subjects = new ReactiveEntityCollection <string, SubjectEntity>(StringComparer.Ordinal);
var localObservables = new ReactiveEntityCollection <string, ObservableDefinitionEntity>(StringComparer.Ordinal);
var localObservablesAndSubjects = new ChainedLookupReactiveEntityCollection <string, ObservableDefinitionEntity, SubjectEntity>(localObservables, _subjects, s => ObservableDefinitionEntity.FromSubject(s));
_observables = new ExternalLookupReactiveEntityCollection <ObservableDefinitionEntity>(localObservablesAndSubjects, TryLookupObservable, metadata);
var localObservers = new ReactiveEntityCollection <string, ObserverDefinitionEntity>(StringComparer.Ordinal);
var localObserversAndSubjects = new ChainedLookupReactiveEntityCollection <string, ObserverDefinitionEntity, SubjectEntity>(localObservers, _subjects, s => ObserverDefinitionEntity.FromSubject(s));
_observers = new ExternalLookupReactiveEntityCollection <ObserverDefinitionEntity>(localObserversAndSubjects, TryLookupObserver, metadata);
var localSubjectFactories = new ReactiveEntityCollection <string, StreamFactoryDefinitionEntity>(StringComparer.Ordinal);
_subjectFactories = new ExternalLookupReactiveEntityCollection <StreamFactoryDefinitionEntity>(localSubjectFactories, TryLookupStreamFactory, metadata);
var localSubscriptionFactories = new ReactiveEntityCollection <string, SubscriptionFactoryDefinitionEntity>(StringComparer.Ordinal);
_subscriptionFactories = new ExternalLookupReactiveEntityCollection <SubscriptionFactoryDefinitionEntity>(localSubscriptionFactories, TryLookupSubscriptionFactory, metadata);
_other = new ReactiveEntityCollection <string, DefinitionEntity>(StringComparer.Ordinal);
_templates = new InvertedLookupReactiveEntityCollection <string, DefinitionEntity>(StringComparer.Ordinal, InvertedDefinitionEntityComparer.Default);
_subscriptions = new ReactiveEntityCollection <string, SubscriptionEntity>(StringComparer.Ordinal);
_reliableSubscriptions = new ReactiveEntityCollection <string, ReliableSubscriptionEntity>(StringComparer.Ordinal);
_metadataRewrites = new ConditionalWeakTable <Expression, Expression>();
InitializeBuiltinDefinitions(queryEngine);
}
public QueryEngineRegistry(IQueryEngineRegistry parent)
{
Debug.Assert(parent != null);
_parent = parent;
_localSubjects = new ReactiveEntityCollection <string, SubjectEntity>(StringComparer.Ordinal);
Subjects = new ChainedLookupReactiveEntityCollection <string, SubjectEntity>(_localSubjects, _parent.Subjects);
_localObservables = new ReactiveEntityCollection <string, ObservableDefinitionEntity>(StringComparer.Ordinal);
var localObservablesAndSubjects = new ChainedLookupReactiveEntityCollection <string, ObservableDefinitionEntity, SubjectEntity>(_localObservables, _localSubjects, s => ObservableDefinitionEntity.FromSubject(s));
Observables = new ChainedLookupReactiveEntityCollection <string, ObservableDefinitionEntity>(localObservablesAndSubjects, _parent.Observables);
_localObservers = new ReactiveEntityCollection <string, ObserverDefinitionEntity>(StringComparer.Ordinal);
var localObserversAndSubjects = new ChainedLookupReactiveEntityCollection <string, ObserverDefinitionEntity, SubjectEntity>(_localObservers, _localSubjects, s => ObserverDefinitionEntity.FromSubject(s));
Observers = new ChainedLookupReactiveEntityCollection <string, ObserverDefinitionEntity>(localObserversAndSubjects, _parent.Observers);
_localSubjectFactories = new ReactiveEntityCollection <string, StreamFactoryDefinitionEntity>(StringComparer.Ordinal);
SubjectFactories = new ChainedLookupReactiveEntityCollection <string, StreamFactoryDefinitionEntity>(_localSubjectFactories, _parent.SubjectFactories);
_localSubscriptionFactories = new ReactiveEntityCollection <string, SubscriptionFactoryDefinitionEntity>(StringComparer.Ordinal);
SubscriptionFactories = new ChainedLookupReactiveEntityCollection <string, SubscriptionFactoryDefinitionEntity>(_localSubscriptionFactories, _parent.SubscriptionFactories);
_localSubscriptions = new ReactiveEntityCollection <string, SubscriptionEntity>(StringComparer.Ordinal);
Subscriptions = new ChainedLookupReactiveEntityCollection <string, SubscriptionEntity>(_localSubscriptions, _parent.Subscriptions);
_localOther = new ReactiveEntityCollection <string, DefinitionEntity>(StringComparer.Ordinal);
Other = new ChainedLookupReactiveEntityCollection <string, DefinitionEntity>(_localOther, _parent.Other);
_localReliableSubscriptions = new ReactiveEntityCollection <string, ReliableSubscriptionEntity>(StringComparer.Ordinal);
ReliableSubscriptions = new ChainedLookupReactiveEntityCollection <string, ReliableSubscriptionEntity>(_localReliableSubscriptions, _parent.ReliableSubscriptions);
_localTemplates = new ReactiveEntityCollection <string, DefinitionEntity>(StringComparer.Ordinal);
var chainedTemplates = new ChainedLookupReactiveEntityCollection <string, DefinitionEntity>(_localTemplates, _parent.Templates);
Templates = new InvertedLookupReactiveEntityCollection <string, DefinitionEntity>(chainedTemplates, InvertedDefinitionEntityComparer.Default);
}
