public async Task InsertAsync(SagaData entity)
{
var sagaID = entity.PartitionKey + entity.RowKey;
var lockID = string.Empty;
if (this.lockSagas)
{
lockID = await sagaLock.CreateLock(sagaID).ConfigureAwait(false);
}
entity.CreationTimeStamp = DateTime.UtcNow;
// Create the table client.
CloudTableClient tableClient = storageAccount.CreateCloudTableClient();
CloudTable table = tableClient.GetTableReference(TABLE_NAME);
// Create the TableOperation object that inserts the customer entity.
TableOperation insertOperation = TableOperation.Insert(entity as ITableEntity);
// Execute the insert operation.
await table.ExecuteAsync(insertOperation).ConfigureAwait(false);
if (this.lockSagas)
{
await sagaLock.ReleaseLock(sagaID, lockID).ConfigureAwait(false);
}
}
public async Task UpdateAsync(SagaData entity)
{
if (entity.IsDeleted)
{
return;
}
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(SettingsUtil.GetSettings <string>(SETTINGS.AZURE_STORAGE));
// Create the table client.
CloudTableClient tableClient = storageAccount.CreateCloudTableClient();
CloudTable table = tableClient.GetTableReference(TABLE_NAME);
// Create the TableOperation object that inserts the customer entity.
TableOperation replaceOperation = TableOperation.Replace(entity as ITableEntity);
// Execute the insert operation.
await table.ExecuteAsync(replaceOperation).ConfigureAwait(false);
var sagaID = entity.PartitionKey + entity.RowKey;
if (this.lockSagas && !entity.IsDeleted)
{
await sagaLock.ReleaseLock(sagaID, entity.LockID).ConfigureAwait(false);
}
}
public async Task DeleteAsync(SagaData entity)
{
entity.IsDeleted = true;
entity.FinishingTimeStamp = DateTime.UtcNow;
var sagaID = entity.PartitionKey + entity.RowKey;
if (this.lockSagas)
{
await sagaLock.DeleteLock(sagaID, entity.LockID).ConfigureAwait(false);
}
// Create the table client.
CloudTableClient tableClient = storageAccount.CreateCloudTableClient();
CloudTable table = tableClient.GetTableReference(TABLE_NAME);
// Create the TableOperation object that inserts the customer entity.
TableOperation replaceOperation = TableOperation.Delete(entity);
// Execute the insert operation.
await table.ExecuteAsync(replaceOperation);
/*
* entity.IsDeleted = true;
* entity.FinishingTimeStamp = DateTime.UtcNow;
*
* var sagaID = entity.PartitionKey + entity.RowKey;
*
* if (this.lockSagas)
* {
* await sagaLock.DeleteLock(sagaID, entity.LockID);
* }*/
}
private async Task <bool> LookForEventsProcessedBySagas <T>(T message, AFBusMessageContext messageContext, ILogger log) where T : class
{
var instantiated = false;
foreach (var sagaInfo in messageToSagaDictionary[message.GetType()])
{
var saga = CreateInstance(sagaInfo.SagaType);
dynamic sagaDynamic = saga;
var sagaMessageToMethod = sagaInfo?.EventsThatCorrelatesSagas?.FirstOrDefault(m => m.Message == message.GetType());
//try to load saga from repository
if (sagaMessageToMethod != null)
{
var locker = new SagaAzureStorageLocker();
object[] lookForInstanceParametersArray = new object[] { message };
sagaDynamic.SagaPersistence = new SagaAzureStoragePersistence(locker, this.lockSaga);
var sagasData = await((Task <List <SagaData> >)sagaMessageToMethod.CorrelatingMethod.Invoke(saga, lookForInstanceParametersArray)).ConfigureAwait(false);
if (sagasData != null)
{
//process each saga data independently
foreach (var sagaData in sagasData)
{
try
{
dynamic finalSagaData = sagaData;
SagaData lockedSagaData = await sagaDynamic.SagaPersistence.GetSagaDataAsync <SagaData>(sagaData.PartitionKey, sagaData.RowKey).ConfigureAwait(false);
finalSagaData.Timestamp = lockedSagaData.Timestamp;
finalSagaData.ETag = lockedSagaData.ETag;
finalSagaData.LockID = lockedSagaData.LockID;
sagaDynamic.Data = finalSagaData;
var bus = new Bus(serializer, SolveDependency <ISendMessages>(), SolveDependency <IPublishEvents>())
{
Context = messageContext
};
object[] parametersArray = new object[] { bus, message, log };
SagaData typedSagaData = (SagaData)sagaData;
log?.LogInformation("Invoke event saga handler " + sagaMessageToMethod.HandlingMethod.ToString() + " for transaction " + messageContext.TransactionID);
await((Task)sagaMessageToMethod.HandlingMethod.Invoke(saga, parametersArray)).ConfigureAwait(false);
await sagaPersistence.UpdateAsync(sagaDynamic.Data).ConfigureAwait(false);
instantiated = true;
}
catch (Exception ex)
{
//if there is an error release the lock.
log?.LogError(ex.Message, ex);
var sagaID = sagaData.PartitionKey + sagaData.RowKey;
await locker.ReleaseLock(sagaID, sagaData.LockID);
throw;
}
}
}
}
}
return(instantiated);
}
private async Task <bool> LookForCommandsProcessedByASaga <T>(T message, AFBusMessageContext messageContext, ILogger log) where T : class
{
var instantiated = false;
foreach (var sagaInfo in messageToSagaDictionary[message.GetType()])
{
var saga = CreateInstance(sagaInfo.SagaType);//Activator.CreateInstance(sagaInfo.SagaType);
dynamic sagaDynamic = saga;
var sagaMessageToMethod = sagaInfo.CommandsThatAreCorrelatedByTheSaga.FirstOrDefault(m => m.Message == message.GetType());
//try to load saga from repository
if (sagaMessageToMethod != null)
{
var locker = new SagaAzureStorageLocker();
object[] lookForInstanceParametersArray = new object[] { message };
sagaDynamic.SagaPersistence = new SagaAzureStoragePersistence(locker, this.lockSaga);
dynamic sagaData = await((Task <SagaData>)sagaMessageToMethod.CorrelatingMethod.Invoke(saga, lookForInstanceParametersArray)).ConfigureAwait(false);
if (sagaData != null)
{
try
{
sagaDynamic.Data = sagaData;
var bus = new Bus(serializer, SolveDependency <ISendMessages>(), SolveDependency <IPublishEvents>())
{
Context = messageContext
};
object[] parametersArray = new object[] { bus, message, log };
SagaData typedSagaData = (SagaData)sagaData;
log?.LogInformation("Invoke saga handler " + sagaMessageToMethod.HandlingMethod.ToString() + " for transaction " + messageContext.TransactionID + " with key (" + typedSagaData.PartitionKey.ToString() + "," + typedSagaData.RowKey + ")");
await((Task)sagaMessageToMethod.HandlingMethod.Invoke(saga, parametersArray)).ConfigureAwait(false);
await sagaPersistence.UpdateAsync(sagaDynamic.Data).ConfigureAwait(false);
instantiated = true;
}
catch (Exception ex)
{
//if there is an error release the lock.
log?.LogError(ex.Message, ex);
var sagaID = sagaData.PartitionKey + sagaData.RowKey;
await locker.ReleaseLock(sagaID, sagaData.LockID);
throw;
}
}
}
sagaMessageToMethod = sagaInfo.CommandsThatActivateTheSaga.FirstOrDefault(m => m.Message == message.GetType());
//if not => create the saga
if (!instantiated && sagaMessageToMethod != null)
{
var bus = new Bus(serializer, SolveDependency <ISendMessages>(), SolveDependency <IPublishEvents>())
{
Context = messageContext
};
object[] parametersArray = new object[] { bus, message, log };
log?.LogInformation("Invoke saga handler " + sagaMessageToMethod.HandlingMethod.ToString() + " for transaction " + messageContext.TransactionID + " creating new saga");
await((Task)sagaMessageToMethod.HandlingMethod.Invoke(saga, parametersArray)).ConfigureAwait(false);
await sagaPersistence.InsertAsync(sagaDynamic.Data).ConfigureAwait(false);
SagaData typedSagaData = (SagaData)sagaDynamic.Data;
log?.LogInformation("Saga data inserted " + sagaMessageToMethod.HandlingMethod.ToString() + " for transaction " + messageContext.TransactionID + " with key (" + typedSagaData.PartitionKey.ToString() + "," + typedSagaData.RowKey.ToString() + ")");
instantiated = true;
}
}
return(instantiated);
}
