public override async Task <IContainSagaData> Find(IServiceProvider builder, SagaFinderDefinition finderDefinition, SynchronizedStorageSession storageSession, ContextBag context, object message, IReadOnlyDictionary <string, string> messageHeaders, CancellationToken cancellationToken = default)
{
var propertyAccessor = (Func <object, object>)finderDefinition.Properties["property-accessor"];
var propertyValue = propertyAccessor(message);
var sagaPropertyName = (string)finderDefinition.Properties["saga-property-name"];
var lookupValues = context.GetOrCreate <SagaLookupValues>();
lookupValues.Add <TSagaData>(sagaPropertyName, propertyValue);
if (propertyValue == null)
{
var saga = context.Get <ActiveSagaInstance>();
var sagaEntityName = saga.Metadata.Name;
var messageName = finderDefinition.MessageTypeName;
throw new Exception($"Message {messageName} mapped to saga {sagaEntityName} has attempted to assign null to the correlation property {sagaPropertyName}. Correlation properties cannot be assigned null.");
}
if (sagaPropertyName.ToLower() == "id")
{
return(await sagaPersister.Get <TSagaData>((Guid)propertyValue, storageSession, context, cancellationToken).ConfigureAwait(false));
}
return(await sagaPersister.Get <TSagaData>(sagaPropertyName, propertyValue, storageSession, context, cancellationToken).ConfigureAwait(false));
}
public override async Task <IContainSagaData> Find(IBuilder builder, SagaFinderDefinition finderDefinition, SynchronizedStorageSession storageSession, ContextBag context, object message)
{
var customFinderType = (Type)finderDefinition.Properties["custom-finder-clr-type"];
var finder = (IFindSagas <TSagaData> .Using <TMessage>)builder.Build(customFinderType);
return(await finder
.FindBy((TMessage)message, storageSession, context)
.ThrowIfNull()
.ConfigureAwait(false));
}
public override async Task <IContainSagaData> Find(IServiceProvider builder, SagaFinderDefinition finderDefinition, SynchronizedStorageSession storageSession, ContextBag context, object message, IReadOnlyDictionary <string, string> messageHeaders, CancellationToken cancellationToken)
{
var customFinderType = (Type)finderDefinition.Properties["custom-finder-clr-type"];
var finder = (IFindSagas <TSagaData> .Using <TMessage>)builder.GetRequiredService(customFinderType);
return(await finder
.FindBy((TMessage)message, storageSession, context, cancellationToken)
.ThrowIfNull()
.ConfigureAwait(false));
}
public override async Task <IContainSagaData> Find(IServiceProvider builder, SagaFinderDefinition finderDefinition, SynchronizedStorageSession storageSession, ContextBag context, object message, IReadOnlyDictionary <string, string> messageHeaders, CancellationToken cancellationToken)
{
var headerName = (string)finderDefinition.Properties["message-header-name"];
if (!messageHeaders.TryGetValue(headerName, out var messageHeaderValue))
{
var saga = context.Get <ActiveSagaInstance>();
var sagaEntityName = saga.Metadata.Name;
var messageName = finderDefinition.MessageTypeName;
throw new Exception($"Message {messageName} mapped to saga {sagaEntityName} is missing a header used for correlation: {headerName}.");
}
var correlationPropertyName = (string)finderDefinition.Properties["saga-property-name"];
var correlationPropertyType = (Type)finderDefinition.Properties["saga-property-type"];
object convertedHeaderValue;
try
{
convertedHeaderValue = TypeDescriptor.GetConverter(correlationPropertyType).ConvertFromInvariantString(messageHeaderValue);
}
catch (Exception exception)
{
var saga = context.Get <ActiveSagaInstance>();
var sagaEntityName = saga.Metadata.Name;
var messageName = finderDefinition.MessageTypeName;
throw new Exception($"Message {messageName} mapped to saga {sagaEntityName} contains correlation header {headerName} value that cannot be cast to correlation property type {correlationPropertyType}: {messageHeaderValue}", exception);
}
var lookupValues = context.GetOrCreate <SagaLookupValues>();
lookupValues.Add <TSagaData>(correlationPropertyName, convertedHeaderValue);
if (convertedHeaderValue == null)
{
var saga = context.Get <ActiveSagaInstance>();
var sagaEntityName = saga.Metadata.Name;
var messageName = finderDefinition.MessageTypeName;
throw new Exception($"Message {messageName} mapped to saga {sagaEntityName} has attempted to assign null to the correlation property {correlationPropertyName}. Correlation properties cannot be assigned null.");
}
if (correlationPropertyName.ToLower() == "id")
{
return(await persister.Get <TSagaData>((Guid)convertedHeaderValue, storageSession, context, cancellationToken).ConfigureAwait(false));
}
return(await persister.Get <TSagaData>(correlationPropertyName, convertedHeaderValue, storageSession, context, cancellationToken).ConfigureAwait(false));
}
public override async Task <IContainSagaData> Find(IBuilder builder, SagaFinderDefinition finderDefinition, SynchronizedStorageSession storageSession, ContextBag context, object message)
{
var propertyAccessor = (Func <object, object>)finderDefinition.Properties["property-accessor"];
var propertyValue = propertyAccessor(message);
var sagaPropertyName = (string)finderDefinition.Properties["saga-property-name"];
if (sagaPropertyName.ToLower() == "id")
{
return(await sagaPersister.Get <TSagaData>((Guid)propertyValue, storageSession, context).ConfigureAwait(false));
}
var lookupValues = context.GetOrCreate <SagaLookupValues>();
lookupValues.Add <TSagaData>(sagaPropertyName, propertyValue);
return(await sagaPersister.Get <TSagaData>(sagaPropertyName, propertyValue, storageSession, context).ConfigureAwait(false));
}
IContainSagaData TryLoadSagaEntity(SagaMetadata metadata, LogicalMessage message)
{
string sagaId;
if (message.Headers.TryGetValue(Headers.SagaId, out sagaId) && !string.IsNullOrEmpty(sagaId))
{
var sagaEntityType = metadata.SagaEntityType;
//since we have a saga id available we can now shortcut the finders and just load the saga
var loaderType = typeof(LoadSagaByIdWrapper <>).MakeGenericType(sagaEntityType);
var loader = (SagaLoader)Activator.CreateInstance(loaderType);
return(loader.Load(SagaPersister, sagaId));
}
SagaFinderDefinition finderDefinition = null;
foreach (var messageType in message.Metadata.MessageHierarchy)
{
if (metadata.TryGetFinder(messageType.FullName, out finderDefinition))
{
break;
}
}
//check if we could find a finder
if (finderDefinition == null)
{
return(null);
}
var finderType = finderDefinition.Type;
var finder = currentContext.Builder.Build(finderType);
return(((SagaFinder)finder).Find(currentContext.Builder, finderDefinition, message));
}
internal abstract IContainSagaData Find(IBuilder builder, SagaFinderDefinition finderDefinition, LogicalMessage message);
public abstract Task <IContainSagaData> Find(IServiceProvider builder, SagaFinderDefinition finderDefinition, SynchronizedStorageSession storageSession, ContextBag context, object message, IReadOnlyDictionary <string, string> messageHeaders, CancellationToken cancellationToken = default);
public abstract Task <IContainSagaData> Find(IBuilder builder, SagaFinderDefinition finderDefinition, SynchronizedStorageSession storageSession, ContextBag context, object message, IReadOnlyDictionary <string, string> messageHeaders);
public abstract Task <IContainSagaData> Find(IBuilder builder, SagaFinderDefinition finderDefinition, SynchronizedStorageSession storageSession, ContextBag context, object message);
public abstract Task<IContainSagaData> Find(IBuilder builder, SagaFinderDefinition finderDefinition, SynchronizedStorageSession storageSession, ContextBag context, object message);