public Task AcceptAggregateRootChanges(IAggregateRoot aggregateRoot)
{
lock (_lockObj)
{
if (aggregateRoot == null)
{
throw new ArgumentNullException("aggregateRoot");
}
_aggregateRootInfoDict.AddOrUpdate(aggregateRoot.UniqueId, x =>
{
aggregateRoot.AcceptChanges();
_logger.InfoFormat("Aggregate root in-memory cache initialized, aggregateRootType: {0}, aggregateRootId: {1}, aggregateRootVersion: {2}", aggregateRoot.GetType().FullName, aggregateRoot.UniqueId, aggregateRoot.Version);
return(new AggregateCacheInfo(aggregateRoot));
}, (x, existing) =>
{
//更新到内存缓存前需要先检查聚合根引用是否有变化，有变化说明此聚合根已经被重置过状态了
if (aggregateRoot.Version > 1 && existing.AggregateRoot != aggregateRoot)
{
throw new AggregateRootReferenceChangedException(aggregateRoot);
}
//接受聚合根的最新事件修改，更新聚合根版本号
var aggregateRootOldVersion = existing.AggregateRoot.Version;
aggregateRoot.AcceptChanges();
existing.UpdateAggregateRoot(aggregateRoot);
_logger.InfoFormat("Aggregate root in-memory cache changed, aggregateRootType: {0}, aggregateRootId: {1}, aggregateRootNewVersion: {2}, aggregateRootOldVersion: {3}", aggregateRoot.GetType().FullName, aggregateRoot.UniqueId, aggregateRoot.Version, aggregateRootOldVersion);
return(existing);
});
}
return(Task.CompletedTask);
}