Task TryGetAndCommitEvent(ProcessingCommand processingCommand, IProcessingCommandHandlerContext context)
{
var command = processingCommand.Command;
var commandType = command.GetType();
var commandId = command.Id;
var aggregateRoots = context.GetAggregateRoots().Where(a => a.GetUncommittedEvents().Any());
if (aggregateRoots?.Count() == 1)
{
var aggregateRoot = aggregateRoots.First();
var aggregateRootType = aggregateRoot.GetType();
var aggregateRootId = aggregateRoot.Id;
var eventStream = new EventStream(
commandId,
aggregateRootType.FullName,
aggregateRootId,
aggregateRoot.Version + 1,
aggregateRoot.GetUncommittedEvents());
var committingEvent = new CommittingEvent(eventStream, processingCommand, aggregateRoot);
logger.LogDebug($"获取命令产生的事件成功，提交并发布事件！");
return(eventCommitter.CommitAsync(committingEvent));
}
if (aggregateRoots?.Count() > 1)
{
logger.LogError($"命令处理超过 1 个聚合根。 [CommandType = {commandType}, CommandId = {commandId}, AggregateRoots = [{string.Join(" | ", aggregateRoots.Select(a => $"Type = {a.GetType()}, Id = {a.Id}"))}]]");
return(processingCommand.OnQueueProcessedAsync(CommandExecutedStatus.Failed, "命令处理超过 1 个聚合根。"));
}
logger.LogWarning($"命令未处理任何聚合根，尝试获取是否已有事件产生并发布。 [CommandType = {commandType}, CommandId = {commandId}]");
return(TryGetAndPublishEventStreamAsync(processingCommand));
}
