/// <summary>
/// Finds an already-existing instance of the given saga data type that has a property with the given <paramref name="propertyName"/>
/// whose value matches <paramref name="propertyValue"/>. Returns null if no such instance could be found
/// </summary>
public async Task <ISagaData> Find(Type sagaDataType, string propertyName, object propertyValue)
{
using (var session = _documentStore.OpenAsyncSession())
{
string sagaDataDocumentId;
if (propertyName == _sagaDataIdPropertyName)
{
sagaDataDocumentId = SagaDataDocument.GetIdFromGuid((Guid)propertyValue);
}
else
{
var sagaCorrelationPropertyDocumentId =
SagaCorrelationPropertyDocument.GetIdForCorrelationProperty(sagaDataType, propertyName,
propertyValue);
var existingSagaCorrelationPropertyDocument =
await session.LoadAsync <SagaCorrelationPropertyDocument>(sagaCorrelationPropertyDocumentId);
sagaDataDocumentId = existingSagaCorrelationPropertyDocument?.SagaDataDocumentId;
}
if (sagaDataDocumentId == null)
{
return(null);
}
var existingSagaDataDocument = await session.LoadAsync <SagaDataDocument>(sagaDataDocumentId);
return(existingSagaDataDocument?.SagaData);
}
}
async Task <IEnumerable <string> > SaveCorrelationProperties(IAsyncDocumentSession session, ISagaData sagaData, IEnumerable <ISagaCorrelationProperty> correlationProperties, string sagaDataDocumentId)
{
var documentIds = new List <string>();
foreach (var correlationProperty in correlationProperties)
{
var propertyName = correlationProperty.PropertyName;
var value = sagaData.GetType().GetProperty(propertyName).GetValue(sagaData).ToString();
var documentId = SagaCorrelationPropertyDocument.GetIdForCorrelationProperty(correlationProperty.SagaDataType, propertyName,
value);
var existingSagaCorrelationPropertyDocument =
await session.LoadAsync <SagaCorrelationPropertyDocument>(documentId);
if (existingSagaCorrelationPropertyDocument != null)
{
if (existingSagaCorrelationPropertyDocument.SagaDataDocumentId != sagaDataDocumentId)
{
throw new ConcurrencyException(
$"Could not save correlation properties. The following correlation property already exists with the same value for another saga: {propertyName} - {value}");
}
}
else
{
var sagaCorrelationPropertyDocument = new SagaCorrelationPropertyDocument(correlationProperty.SagaDataType, propertyName, value, sagaDataDocumentId);
await session.StoreAsync(sagaCorrelationPropertyDocument, documentId);
}
documentIds.Add(documentId);
}
return(documentIds);
}
async Task<IEnumerable<string>> SaveCorrelationProperties(IAsyncDocumentSession session, ISagaData sagaData, IEnumerable<ISagaCorrelationProperty> correlationProperties, string sagaDataDocumentId)
{
var documentIds = new List<string>();
foreach (var correlationProperty in correlationProperties)
{
var propertyName = correlationProperty.PropertyName;
var value = sagaData.GetType().GetProperty(propertyName).GetValue(sagaData).ToString();
var documentId = SagaCorrelationPropertyDocument.GetIdForCorrelationProperty(correlationProperty.SagaDataType, propertyName,
value);
var existingSagaCorrelationPropertyDocument =
await session.LoadAsync<SagaCorrelationPropertyDocument>(documentId);
if (existingSagaCorrelationPropertyDocument != null)
{
if (existingSagaCorrelationPropertyDocument.SagaDataDocumentId != sagaDataDocumentId)
{
throw new ConcurrencyException(
$"Could not save correlation properties. The following correlation property already exists with the same value for another saga: {propertyName} - {value}");
}
}
else
{
var sagaCorrelationPropertyDocument = new SagaCorrelationPropertyDocument(correlationProperty.SagaDataType, propertyName, value, sagaDataDocumentId);
await session.StoreAsync(sagaCorrelationPropertyDocument, documentId);
}
documentIds.Add(documentId);
}
return documentIds;
}
