async Task SendSubscribeMessageWithRetries(string destination, OutgoingMessage subscriptionMessage, string messageType, ContextBag context, int retriesCount = 0)
{
var state = context.GetOrCreate <Settings>();
try
{
var transportOperation = new TransportOperation(subscriptionMessage, new UnicastAddressTag(destination));
var transportTransaction = context.GetOrCreate <TransportTransaction>();
await dispatcher.Dispatch(new TransportOperations(transportOperation), transportTransaction, context).ConfigureAwait(false);
}
catch (QueueNotFoundException ex)
{
if (retriesCount < state.MaxRetries)
{
await Task.Delay(state.RetryDelay).ConfigureAwait(false);
await SendSubscribeMessageWithRetries(destination, subscriptionMessage, messageType, context, ++retriesCount).ConfigureAwait(false);
}
else
{
var message = $"Failed to subscribe to {messageType} at publisher queue {destination}, reason {ex.Message}";
Logger.Error(message, ex);
throw new QueueNotFoundException(destination, message, ex);
}
}
}
public override async Task <IContainSagaData> Find(IServiceProvider builder, SagaFinderDefinition finderDefinition, SynchronizedStorageSession storageSession, ContextBag context, object message, IReadOnlyDictionary <string, string> messageHeaders, CancellationToken cancellationToken = default)
{
var propertyAccessor = (Func <object, object>)finderDefinition.Properties["property-accessor"];
var propertyValue = propertyAccessor(message);
var sagaPropertyName = (string)finderDefinition.Properties["saga-property-name"];
var lookupValues = context.GetOrCreate <SagaLookupValues>();
lookupValues.Add <TSagaData>(sagaPropertyName, propertyValue);
if (propertyValue == null)
{
var saga = context.Get <ActiveSagaInstance>();
var sagaEntityName = saga.Metadata.Name;
var messageName = finderDefinition.MessageTypeName;
throw new Exception($"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));
}
async Task <CompletableSynchronizedStorageSession> OpenSession(ContextBag context)
{
var transportTransaction = context.GetOrCreate <TransportTransaction>();
var session = await transportTransactionAdapter.TryAdapt(transportTransaction, context).ConfigureAwait(false)
?? await synchronizedStorage.OpenSession(context).ConfigureAwait(false);
return(session);
}
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));
}
static TSagaData Resolve <TSagaData>(byte[] data, ContextBag context)
where TSagaData : IContainSagaData
{
var serializer = new DataContractSerializer(typeof(TSagaData));
using (var ms = new MemoryStream(data))
{
var saga = (TSagaData)serializer.ReadObject(ms);
context.GetOrCreate <Metadata>().SagaData[saga.Id] = data;
return(saga);
}
}
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));
}