internal IReliableQubscription Subscribe <T>(IReliableQbservable <T> observable, IReliableQbserver <T> observer, Uri subscriptionUri, object state)
{
var subscribe = Expression.Parameter(typeof(Func <IReliableQbservable <T>, IReliableQbserver <T>, IReliableQubscription>), Constants.SubscribeUri);
var expression = Expression.Invoke(subscribe, observable.Expression, observer.Expression);
var normalized = _expressionServices.Normalize(expression);
var subscription = new KnownReliableQubscription(normalized, subscriptionUri, this);
CreateSubscription(subscription, state);
return(subscription);
}
/// <summary>
/// Converts an instance of <see cref="IAsyncReactiveResource"/>
/// to its underlying representation for serialization.
/// </summary>
/// <param name="value">The original value.</param>
/// <param name="sourceType">The source type.</param>
/// <param name="targetType">The target type.</param>
/// <returns>The converted instance.</returns>
public override object ConvertTo(object value, Type sourceType, Type targetType)
{
// Base class knows how to write null values
Debug.Assert(value != null);
var resource = (IAsyncReactiveResource)value;
var container = new ReactiveResourceContainer
{
Uri = resource.Uri,
Expression = _expressionServices != null
? _expressionServices.Normalize(resource.Expression).ToExpressionSlim()
: resource.Expression.ToExpressionSlim(),
};
if (value is IAsyncReactiveDefinedResource definedResource)
{
container.State = (TState)definedResource.State;
}
else if (value is IAsyncReactiveProcessResource processResource)
{
container.State = (TState)processResource.State;
}
return(container);
}
protected Resource(ReactiveResourceContainer container, IReactiveExpressionServices expressionServices)
{
Debug.Assert(container != null);
Uri = container.Uri;
_expression = new Lazy <Expression>(() => expressionServices != null
? expressionServices.Normalize(container.Expression.ToExpression())
: container.Expression.ToExpression());
}
/// <summary>
/// Executes the specified expression.
/// </summary>
/// <typeparam name="TResult">Result type of the expression.</typeparam>
/// <param name="expression">Expression to execute.</param>
/// <returns>Result of executing the expression.</returns>
protected override TResult Execute <TResult>(Expression expression)
{
var expr = _expressionServices.Normalize(expression);
return(_provider.Provider.Execute <TResult>(expr));
}
/// <summary>
/// Defines a stream factory identified by the specified URI.
/// </summary>
/// <typeparam name="TInput">Type of the data received by the subjects created by the stream factory.</typeparam>
/// <typeparam name="TOutput">Type of the data produced by the subjects created by the stream factory.</typeparam>
/// <param name="uri">URI identifying the stream factory.</param>
/// <param name="streamFactory">Stream factory to be defined.</param>
/// <param name="state">Additional metadata to associate with the artifact. Implementations can interpret this value, or ignore it.</param>
/// <param name="token">Token to observe for cancellation of the request.</param>
/// <returns>Task to await the completion of the stream factory definition.</returns>
protected override Task DefineStreamFactoryAsyncCore <TInput, TOutput>(Uri uri, IAsyncReactiveQubjectFactory <TInput, TOutput> streamFactory, object state = null, CancellationToken token = default)
{
var expression = _expressionServices.Normalize(streamFactory.Expression);
return(_provider.DefineStreamFactoryAsync(uri, expression, state, token));
}
/// <summary>
/// Defines a stream factory identified by the specified URI.
/// </summary>
/// <typeparam name="TInput">Type of the data received by the subjects created by the stream factory.</typeparam>
/// <typeparam name="TOutput">Type of the data produced by the subjects created by the stream factory.</typeparam>
/// <param name="uri">URI identifying the stream factory.</param>
/// <param name="streamFactory">Stream factory to be defined.</param>
/// <param name="state">Additional metadata to associate with the artifact. Implementations can interpret this value, or ignore it.</param>
protected override void DefineStreamFactoryCore <TInput, TOutput>(Uri uri, IReactiveQubjectFactory <TInput, TOutput> streamFactory, object state = null)
{
var expression = _expressionServices.Normalize(streamFactory.Expression);
_provider.DefineStreamFactory(uri, expression, state);
}