/// <summary>
/// Gets <see cref="ICompletes{TResult}" />, applying <paramref name="state" />,
/// dispatching to <code>State(T state)</code> when completed, and supply an
/// eventual outcome by means of the given <code>andThen</code> function.
/// </summary>
/// <param name="state">The state to preserve.</param>
/// <param name="andThen">
/// The <see cref="CompletionSupplier{TResult}" /> that will provide the fully updated state following this operation,
/// and which will used to answer an eventual outcome to the client of this entity
/// </param>
/// <typeparam name="TSource">The type of the source.</typeparam>
/// <typeparam name="TResult">The return type of the Supplier function, which is the type of the completed state.</typeparam>
/// <returns><see cref="ICompletes{TResult}" />.</returns>
protected ICompletes <TResult> Apply <TSource, TResult>(T state, Func <TResult>?andThen)
{
var completionSupplier = CompletionSupplier <TResult> .SupplierOrNull(andThen, CompletesEventually());
var completes = andThen == null ? null : Completes();
StowMessages(typeof(IPersistResultInterest));
_info.Store.Persist(StateSources <T, Source <TSource> > .Of(state), _persistResultInterest, completionSupplier);
return((ICompletes <TResult>)completes !);
}
/// <summary>
/// Gets <see cref="ICompletes{TResult}" />, applying <paramref name="state" /> and <paramref name="metadataValue" />,
/// that was modified due to the descriptive <paramref name="operation"/> and
/// eventual outcome by means of the given <code>andThen</code> function.
/// </summary>
/// <param name="state">The state to apply.</param>
/// <param name="metadataValue">The Metadata to apply along with the state.</param>
/// <param name="operation">The descriptive name of the operation that caused the state modification.</param>
/// <param name="andThen">
/// The <see cref="CompletionSupplier{TReturn}" /> that will provide the fully updated state following this operation,
/// and which will used to answer an eventual outcome to the client of this entity
/// </param>
/// <typeparam name="TResult">The return type of the Supplier function, which is the type of the completed state.</typeparam>
/// <returns><see cref="ICompletes{TResult}" />.</returns>
protected virtual ICompletes <TResult> Apply <TResult>(T state, string?metadataValue, string?operation, Func <TResult>?andThen)
{
var metadata = Metadata.With(state !, metadataValue ?? "", operation ?? "");
var completionSupplier = CompletionSupplier <T> .SupplierOrNull(andThen, CompletesEventually());
var completes = andThen == null ? null : Completes();
StowMessages(typeof(IWriteResultInterest));
_info.Store.Write(Id, state, NextVersion(), metadata, _writeInterest, completionSupplier);
return((ICompletes <TResult>)completes !);
}
public void TestThatFailedHasExceptionInfo()
{
var cause = new Exception("TestInner", new Exception());
var applicable = new Applicable <object>(null, Enumerable.Empty <ISource>(), Metadata.NullMetadata(), CompletionSupplier <object> .SupplierOrNull <object>(() => null, null));
var e = new ApplyFailedException <object>(applicable, "TestOuter", cause);
Assert.NotNull(e);
Assert.NotNull(e.Applicable);
Assert.Equal("TestOuter", e.Message);
Assert.NotNull(e.InnerException);
Assert.Equal("TestInner", e.InnerException.Message);
Assert.NotNull(e.Message);
Assert.NotNull(e.InnerException.InnerException);
Assert.Equal("Exception of type 'System.Exception' was thrown.", e.InnerException.InnerException.Message);
}
public void TestThatFailedHasApplicable()
{
var applicable = new Applicable <object>(null, Enumerable.Empty <ISource>(), Metadata.NullMetadata(), CompletionSupplier <object> .SupplierOrNull <object>(() => null, null));
var e = new ApplyFailedException <object>(applicable);
Assert.NotNull(e);
Assert.NotNull(e.Applicable);
Assert.Null(e.Applicable.State);
Assert.NotNull(e.Applicable.Sources);
Assert.NotNull(e.Applicable.Metadata);
Assert.NotNull(e.Applicable.CompletionSupplier);
Assert.Equal("Exception of type 'Vlingo.Xoom.Lattice.Model.ApplyFailedException`1[System.Object]' was thrown.", e.Message);
Assert.Null(e.InnerException);
}