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Code Issues Releases Wiki Activity

Correctly rollback failed imports

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This commit is contained in:
Dean Herbert 2018-05-28 21:45:05 +09:00
parent bcb04f6168
commit a3287b8cf2
1 changed files with 14 additions and 6 deletions
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20
osu.Game/Database/ArchiveModelManager.cs
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@ -58,13 +58,20 @@ namespace osu.Game.Database
private readonly List<Action> cachedEvents = new List<Action>();
/// <summary>
/// Allows delaying of outwards events until an operation is confirmed (at a database level).
/// </summary>
private bool delayingEvents;
private void cacheEvents()
{
delayingEvents = true;
}
/// <summary>
/// Begin delaying outwards events.
/// </summary>
private void delayEvents() => delayingEvents = true;
/// <summary>
/// Flush delayed events and disable delaying.
/// </summary>
/// <param name="perform">Whether the flushed events should be performed.</param>
private void flushEvents(bool perform)
{
if (perform)
@ -167,8 +174,8 @@ namespace osu.Game.Database
/// <param name="archive">The archive to be imported.</param>
public TModel Import(ArchiveReader archive)
{
TModel item = null;
cacheEvents();
TModel item;
delayEvents();
try
{
@ -196,6 +203,7 @@ namespace osu.Game.Database
item = null;
}
// we only want to flush events after we've confirmed the write context didn't have any errors.
flushEvents(item != null);
return item;
}