public Task <AsyncTaskResult <EventAppendResult> > BatchAppendAsync(IEnumerable <DomainEventStream> eventStreams)
{
if (eventStreams.Count() == 0)
{
return(Task.FromResult(new AsyncTaskResult <EventAppendResult>(AsyncTaskStatus.Success, new EventAppendResult())));
}
var eventStreamDict = new Dictionary <string, IList <DomainEventStream> >();
var aggregateRootIdList = eventStreams.Select(x => x.AggregateRootId).Distinct().ToList();
foreach (var aggregateRootId in aggregateRootIdList)
{
var eventStreamList = eventStreams.Where(x => x.AggregateRootId == aggregateRootId).ToList();
if (eventStreamList.Count > 0)
{
eventStreamDict.Add(aggregateRootId, eventStreamList);
}
}
var batchAggregateEventAppendResult = new BatchAggregateEventAppendResult(eventStreamDict.Keys.Count);
foreach (var entry in eventStreamDict)
{
BatchAppendAggregateEventsAsync(entry.Key, entry.Value, batchAggregateEventAppendResult, 0);
}
return(batchAggregateEventAppendResult.TaskCompletionSource.Task);
}
private void TryFindEventByCommandIdAsync(string aggregateRootId, string commandId, BatchAggregateEventAppendResult batchAggregateEventAppendResult, int retryTimes)
{
_ioHelper.TryAsyncActionRecursively("TryFindEventByCommandIdAsync",
() => FindAsync(aggregateRootId, commandId),
currentRetryTimes => TryFindEventByCommandIdAsync(aggregateRootId, commandId, batchAggregateEventAppendResult, currentRetryTimes),
result =>
{
if (result.Data != null)
{
batchAggregateEventAppendResult.AddCompleteAggregate(aggregateRootId, new AggregateEventAppendResult
{
EventAppendStatus = EventAppendStatus.DuplicateCommand,
DuplicateCommandId = result.Data.CommandId
});
}
},
() => string.Format("[aggregateRootId:{0}, commandId:{1}]", aggregateRootId, commandId),
null,
retryTimes, true);
}
private void BatchAppendAggregateEventsAsync(string aggregateRootId, IList <DomainEventStream> eventStreamList, BatchAggregateEventAppendResult batchAggregateEventAppendResult, int retryTimes)
{
_ioHelper.TryAsyncActionRecursively("BatchAppendAggregateEventsAsync",
() => BatchAppendAggregateEventsAsync(aggregateRootId, eventStreamList),
currentRetryTimes => BatchAppendAggregateEventsAsync(aggregateRootId, eventStreamList, batchAggregateEventAppendResult, currentRetryTimes),
result =>
{
var eventAppendStatus = result.Data;
if (eventAppendStatus == EventAppendStatus.Success)
{
batchAggregateEventAppendResult.AddCompleteAggregate(aggregateRootId, new AggregateEventAppendResult
{
EventAppendStatus = EventAppendStatus.Success
});
}
else if (eventAppendStatus == EventAppendStatus.DuplicateEvent)
{
batchAggregateEventAppendResult.AddCompleteAggregate(aggregateRootId, new AggregateEventAppendResult
{
EventAppendStatus = EventAppendStatus.DuplicateEvent
});
}
else if (eventAppendStatus == EventAppendStatus.DuplicateCommand)
{
foreach (var eventStream in eventStreamList)
{
TryFindEventByCommandIdAsync(aggregateRootId, eventStream.CommandId, batchAggregateEventAppendResult, 0);
}
}
},
() => string.Format("[aggregateRootId: {0}, eventStreamCount: {1}]", aggregateRootId, eventStreamList.Count),
null,
retryTimes, true);
}
private void TryFindEventByCommandIdAsync(string aggregateRootId, string commandId, BatchAggregateEventAppendResult batchAggregateEventAppendResult, int retryTimes)
{
_ioHelper.TryAsyncActionRecursively("TryFindEventByCommandIdAsync",
() => FindAsync(aggregateRootId, commandId),
currentRetryTimes => TryFindEventByCommandIdAsync(aggregateRootId, commandId, batchAggregateEventAppendResult, currentRetryTimes),
result =>
{
if (result.Data != null)
{
batchAggregateEventAppendResult.AddCompleteAggregate(aggregateRootId, new AggregateEventAppendResult
{
EventAppendStatus = EventAppendStatus.DuplicateCommand,
DuplicateCommandId = result.Data.CommandId
});
}
},
() => string.Format("[aggregateRootId:{0}, commandId:{1}]", aggregateRootId, commandId),
errorMessage =>
{
_logger.Fatal(string.Format("TryFindEventByCommandIdAsync has unknown exception, the code should not be run to here, aggregateRootId:{0}, commandId:{1}, errorMessage: {2}", aggregateRootId, commandId, errorMessage));
},
retryTimes, true);
}