Task <SagaSearchResult> ISearchForSaga.Search(SagaSearchMethod searchMethod, object message, CancellationToken cancellationToken)
{
Contract.Requires <ArgumentNullException>(searchMethod != null, nameof(searchMethod));
Contract.Requires <ArgumentNullException>(message != null, nameof(message));
Contract.Ensures(Contract.Result <Task <SagaSearchResult> >() != null);
return(null);
}
/// <summary>
/// Seaches for saga data using the specified search method and message.
/// </summary>
/// <param name="searchMethod">The <see cref="SagaSearchMethod">search method</see> used to find the saga data.</param>
/// <param name="messsage">The correlated message used to find the saga data.</param>
/// <param name="cancellationToken">The <see cref="CancellationToken">token</see> that can be used to cancel the operation.</param>
/// <returns>A <see cref="Task{TResult}">task</see> containing the <see cref="SagaSearchResult">search result</see>.</returns>
public async Task <SagaSearchResult> Search(SagaSearchMethod searchMethod, object messsage, CancellationToken cancellationToken)
{
Arg.NotNull(searchMethod, nameof(searchMethod));
Arg.NotNull(messsage, nameof(messsage));
if (!(searchMethod is ByPropertySagaSearchMethod propertySearchMethod))
{
return(new SagaSearchResult());
}
var messagePropertyValue = propertySearchMethod.ReadMessageProperty(messsage);
var sagaPropertyName = propertySearchMethod.PropertyName;
var properties = new Dictionary <string, object>()
{
[sagaPropertyName] = messagePropertyValue
};
var data = default(TData);
if (messagePropertyValue == null)
{
return(new SagaSearchResult(data, properties));
}
if (StringComparer.OrdinalIgnoreCase.Equals(sagaPropertyName, nameof(ISagaData.Id)))
{
data = await store.Retrieve <TData>((Guid)messagePropertyValue, cancellationToken).ConfigureAwait(false);
}
else
{
data = await store.Retrieve <TData>(sagaPropertyName, messagePropertyValue, cancellationToken).ConfigureAwait(false);
}
return(new SagaSearchResult(data, properties));
}
/// <summary> /// Attempts to resolve the saga search method for the specified message type. /// </summary> /// <param name="messageType">The qualified name of the message type to retrieve the search method for.</param> /// <param name="searchMethod">The resolved <see cref="SagaSearchMethod">search method</see> or <c>null</c> of no search method is matched.</param> /// <returns>True if the <paramref name="searchMethod">search method</paramref> is matched; otherwise, false.</returns> public bool TryGetSearchMethod(string messageType, out SagaSearchMethod searchMethod) => searchMethods.TryGetValue(messageType, out searchMethod);