public async Task UpdateTitle(string id, string title)
{
var @event = await CreateEvent(id, EventTypes.TitleUpdated, title);
var titleUpdated = TitleUpdated.Create(@event, id, title);
messageQueue.Publish(titleUpdated);
}
void OnTitleUpdated(TitleUpdated titleUpdated)
{
lock (lock_)
{
if (CheckMessageSanity(titleUpdated))
{
if (data.ContainsKey(titleUpdated.ProductId))
{
var entry = data[titleUpdated.ProductId];
entry.Title = titleUpdated.Title;
}
}
}
}
protected override IEnumerable <CommandDefinition> GetCommand(object evt)
{
return(evt switch
{
ArticlePublished e => ArrayOf(new ArticleInsertCommand(e).Command, new TagBatchInsert(e).Command),
ArticleDeleted e => ArrayOf(
new CommandDefinition("delete from Tags where ArticleId=@ArticleId", e),
new CommandDefinition("delete from Favorites where ArticleId=@ArticleId", e),
new CommandDefinition("delete from Articles where ArticleId=@ArticleId", e)),
ArticleFavorited e => ArrayOf(
new CommandDefinition("insert into Favorites (ArticleId, UserId) values (@ArticleId, @UserId)", e),
new CommandDefinition("update Articles set FavoriteCount=FavoriteCount+1 where ArticleId=@ArticleId", e)),
ArticleUnfavorited e => ArrayOf(
new CommandDefinition("delete from Favorites where ArticleId=@ArticleId and UserId=@UserId", e),
new CommandDefinition("update Articles set FavoriteCount=FavoriteCount-1 where ArticleId=@ArticleId", e)),
BodyUpdated e => ArrayOf(new CommandDefinition("update Articles set Body=@Body, UpdatedDate=@UpdatedAt where ArticleId=@ArticleId", e)),
DescriptionUpdated e => ArrayOf(new CommandDefinition("update Articles set Description=@Description, UpdatedDate=@UpdatedAt where ArticleId=@ArticleId", e)),
TitleUpdated e => ArrayOf(new CommandDefinition("update Articles set Title=@Title, TitleSlug=@TitleSlug, UpdatedDate=@UpdatedAt where ArticleId=@ArticleId", e)),
_ => Array.Empty <CommandDefinition>()
});
IMessage <object> ConstructMessage <T>(Event @event)
{
var data = @event.Data;
if (data == null)
{
throw new ArgumentNullException(nameof(@event.Data));
}
switch (data.Type)
{
case EventTypes.AmountUpdated:
var amount = data.Payload as int?;
if (amount != null)
{
return((IMessage <object>)AmountUpdated.Create(@event, data.Id, amount.Value));
}
break;
case EventTypes.ProductCreated:
if (data.Payload is Product product)
{
return((IMessage <object>)ProductCreated.Create(@event, product));
}
break;
case EventTypes.ProductDeleted:
return((IMessage <object>)ProductDeleted.Create(@event, data.Id));
case EventTypes.TitleUpdated:
var title = data.Payload as string;
return((IMessage <object>)TitleUpdated.Create(@event, data.Id, title));
default:
break;
}
throw new ArgumentException($"InvalidEvent data: {data.Id}, " +
$"{data.Type}, {data.Payload}");
}
