/// <summary>Try to complete the command async result for the given commandId.
/// </summary>
/// <param name="commandId">The commandId.</param>
/// <param name="aggregateRootId">The id of the aggregate which was created or updated by the command.</param>
/// <param name="errorInfo">The error info if the command execution has any error.</param>
public void TryComplete(Guid commandId, string aggregateRootId, ErrorInfo errorInfo)
{
CommandAsyncResult commandAsyncResult;
if (!_commandAsyncResultDict.TryRemove(commandId, out commandAsyncResult))
{
return;
}
_retryService.TryAction("TryCompleteCommandAsyncResult", () => commandAsyncResult.Complete(aggregateRootId, errorInfo), 3, null);
}
public void SetConcurrentException(ErrorInfo errorInfo)
{
if (errorInfo == null)
{
throw new ArgumentNullException("errorInfo");
}
if (!(errorInfo.Exception is ConcurrentException))
{
throw new InvalidOperationException(string.Format("Unknown exception {0} cannot be set as concurrent exception.", errorInfo.Exception.GetType().Name));
}
HasConcurrentException = true;
ErrorInfo = errorInfo;
}
/// <summary>Complete the command execution async result.
/// </summary>
/// <param name="aggregateRootId"></param>
/// <param name="errorInfo"></param>
public void Complete(string aggregateRootId, ErrorInfo errorInfo)
{
IsCompleted = true;
AggregateRootId = aggregateRootId;
ErrorInfo = errorInfo;
if (_waitHandle != null)
{
_waitHandle.Set();
}
else if (_callback != null)
{
_callback(this);
}
}
public void RetryCommand(CommandInfo commandInfo, ErrorInfo errorInfo, ActionInfo retrySuccessCallbackAction)
{
if (_retryCommandQueue == null)
{
_retryCommandQueue = Configuration.Instance.GetRetryCommandQueue();
}
var command = commandInfo.Command;
Action<CommandInfo, ActionInfo> actionAfterCommandRetried = (currentCommandInfo, callbackActionInfo) =>
{
currentCommandInfo.IncreaseRetriedCount();
_logger.InfoFormat("Sent {0} to command retry queue for {1} time.", currentCommandInfo.Command.GetType().Name, currentCommandInfo.RetriedCount);
callbackActionInfo.Action(callbackActionInfo.Data);
};
if (commandInfo.RetriedCount < command.RetryCount)
{
if (_retryService.TryAction("TryEnqueueCommand", () => TryEnqueueCommand(command), 2))
{
actionAfterCommandRetried(commandInfo, retrySuccessCallbackAction);
}
else
{
_retryService.RetryInQueue(
new ActionInfo(
"TryEnqueueCommand",
(obj) => TryEnqueueCommand(obj as ICommand),
command,
new ActionInfo(
"TryEnqueueCommandFinishedAction",
(obj) =>
{
var data = obj as dynamic;
var currentCommandInfo = data.CommandInfo as CommandInfo;
var callbackActionInfo = data.Callback as ActionInfo;
actionAfterCommandRetried(currentCommandInfo, callbackActionInfo);
return true;
},
new { CommandInfo = commandInfo, Callback = retrySuccessCallbackAction },
null)));
}
}
else
{
_commandAsyncResultManager.TryComplete(commandInfo.Command.Id, errorInfo.ErrorMessage, errorInfo.Exception);
}
}
/// <summary>Retry the given command.
/// </summary>
/// <param name="commandInfo"></param>
/// <param name="eventStream"></param>
/// <param name="errorInfo"></param>
/// <param name="retrySuccessCallbackAction"></param>
public void RetryCommand(CommandInfo commandInfo, EventStream eventStream, ErrorInfo errorInfo, Action retrySuccessCallbackAction)
{
if (_retryCommandQueue == null)
{
_retryCommandQueue = Configuration.Instance.GetRetryCommandQueue();
}
var command = commandInfo.Command;
if (commandInfo.RetriedCount < command.RetryCount)
{
_retryService.TryAction("TryEnqueueCommand", () => TryEnqueueCommand(commandInfo), 3, retrySuccessCallbackAction);
}
else
{
_commandAsyncResultManager.TryComplete(command.Id, eventStream.AggregateRootId, errorInfo);
_logger.InfoFormat("{0} retried count reached to its max retry count {1}.", command.GetType().Name, command.RetryCount);
if (retrySuccessCallbackAction != null)
{
retrySuccessCallbackAction();
}
}
}
public RollbackTransferOutRequested(Guid processId, TransferInfo transferInfo, ErrorInfo errorInfo)
: base(processId, processId, transferInfo)
{
ErrorInfo = errorInfo;
}
public MessageExecuteResult Execute(ICommand command)
{
var executeResult = MessageExecuteResult.None;
var errorInfo = new ErrorInfo();
var commandHandler = _commandHandlerProvider.GetCommandHandler(command);
if (commandHandler == null)
{
var errorMessage = string.Format("Command handler not found for {0}", command.GetType().FullName);
_logger.Fatal(errorMessage);
_commandAsyncResultManager.TryComplete(command.Id, errorMessage, null);
return MessageExecuteResult.Executed;
}
var submitResult = SubmitResult.None;
AggregateRoot dirtyAggregate = null;
try
{
_trackingContext.Clear();
_processingCommandCache.Add(command);
commandHandler.Handle(_commandContext, command);
dirtyAggregate = GetDirtyAggregate(_trackingContext);
if (dirtyAggregate != null)
{
submitResult = SubmitChanges(dirtyAggregate, BuildEventStream(dirtyAggregate, command), command, errorInfo);
}
}
catch (Exception ex)
{
var commandHandlerType = commandHandler.GetInnerCommandHandler().GetType();
errorInfo.ErrorMessage = string.Format("Exception raised when {0} handling {1}, command id:{2}.", commandHandlerType.Name, command.GetType().Name, command.Id);
errorInfo.Exception = ex;
_logger.Error(errorInfo.ErrorMessage, ex);
}
finally
{
_trackingContext.Clear();
_processingCommandCache.TryRemove(command.Id);
if (dirtyAggregate == null)
{
_commandAsyncResultManager.TryComplete(command.Id, errorInfo.ErrorMessage, errorInfo.Exception);
executeResult = MessageExecuteResult.Executed;
}
else
{
if (submitResult == SubmitResult.None ||
submitResult == SubmitResult.Success ||
submitResult == SubmitResult.SynchronizerFailed)
{
_commandAsyncResultManager.TryComplete(command.Id, errorInfo.ErrorMessage, errorInfo.Exception);
executeResult = MessageExecuteResult.Executed;
}
else if (submitResult == SubmitResult.Retried)
{
executeResult = MessageExecuteResult.Executed;
}
else if (submitResult == SubmitResult.PublishFailed || submitResult == SubmitResult.Failed)
{
executeResult = MessageExecuteResult.Failed;
}
}
}
return executeResult;
}
private bool TryCallSynchronizersBeforeEventPersisting(IEnumerable<IEventPersistenceSynchronizer> synchronizers, EventStream eventStream, ErrorInfo errorInfo)
{
if (synchronizers != null && synchronizers.Count() > 0)
{
foreach (var synchronizer in synchronizers)
{
try
{
synchronizer.OnBeforePersisting(eventStream);
}
catch (Exception ex)
{
var commandInfo = _processingCommandCache.Get(eventStream.CommandId);
errorInfo.Exception = ex;
errorInfo.ErrorMessage = string.Format(
"Exception raised when calling synchronizer's OnBeforePersisting method. synchronizer:{0}, command:{1}, event stream:{2}",
synchronizer.GetType().Name,
commandInfo.Command.GetType().Name,
eventStream.GetStreamInformation());
_logger.Error(errorInfo.ErrorMessage, ex);
return false;
}
}
}
return true;
}
private SubmitResult SubmitChanges(AggregateRoot aggregateRoot, EventStream eventStream, ICommand command, ErrorInfo errorInfo)
{
var submitResult = SubmitResult.None;
var synchronizers = _eventPersistenceSynchronizerProvider.GetSynchronizers(eventStream);
var success = TryCallSynchronizersBeforeEventPersisting(synchronizers, eventStream, errorInfo);
if (!success)
{
return SubmitResult.SynchronizerFailed;
}
var persistResult = PersistResult.None;
try
{
_eventStore.Append(eventStream);
persistResult = PersistResult.Success;
}
catch (Exception ex)
{
persistResult = ProcessException(ex, eventStream, errorInfo);
}
if (persistResult == PersistResult.Success)
{
TryRefreshMemoryCache(aggregateRoot, eventStream);
TryCallSynchronizersAfterEventPersisted(synchronizers, eventStream);
if (TryPublishEventStream(eventStream))
{
submitResult = SubmitResult.Success;
}
else
{
submitResult = SubmitResult.PublishFailed;
}
}
else if (persistResult == PersistResult.Retried)
{
submitResult = SubmitResult.Retried;
}
else if (persistResult == PersistResult.Failed)
{
submitResult = SubmitResult.Failed;
}
return submitResult;
}
private PersistResult ProcessException(Exception exception, EventStream eventStream, ErrorInfo errorInfo)
{
if (exception is ConcurrentException)
{
if (IsEventStreamCommitted(eventStream))
{
return PersistResult.Success;
}
var commandInfo = _processingCommandCache.Get(eventStream.CommandId);
_logger.Error(string.Format(
"Concurrent exception raised when persisting event stream, command:{0}, event stream:{1}",
commandInfo.Command.GetType().Name,
eventStream.GetStreamInformation()), exception);
_retryCommandService.RetryCommand(commandInfo, exception);
return PersistResult.Retried;
}
else
{
var commandInfo = _processingCommandCache.Get(eventStream.CommandId);
_logger.Error(string.Format(
"Exception raised when persisting event stream, command:{0}, event stream:{1}",
commandInfo.Command.GetType().Name,
eventStream.GetStreamInformation()), exception);
return PersistResult.Failed;
}
}
public TransferProcessResult(bool isSuccess, ErrorInfo errorInfo)
{
IsSuccess = isSuccess;
ErrorInfo = errorInfo;
}