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Add "migration"

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Also simplify initial migration for BeatmapStore by just nuking everything.
This commit is contained in:
Dean Herbert
2017-08-01 10:16:48 +09:00
parent c060d32765
commit c73e139954
2 changed files with 40 additions and 9 deletions
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36
osu.Game/IO/FileStore.cs
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@ -23,6 +23,8 @@ namespace osu.Game.IO
public readonly ResourceStore<byte[]> Store;
protected override int StoreVersion => 2;
public FileStore(SQLiteConnection connection, Storage storage) : base(connection, storage)
{
Store = new NamespacedResourceStore<byte[]>(new StorageBackedResourceStore(storage), prefix);
@ -35,7 +37,19 @@ namespace osu.Game.IO
protected override void Prepare(bool reset = false)
{
if (reset)
{
try
{
foreach (var f in Query<FileInfo>())
Storage.Delete(Path.Combine(prefix, f.Hash));
}
catch
{
// we don't want to ever crash as a result of a reset operation.
}
Connection.DropTable<FileInfo>();
}
Connection.CreateTable<FileInfo>();
}
@ -46,6 +60,28 @@ namespace osu.Game.IO
deletePending();
}
/// <summary>
/// Perform migrations between two store versions.
/// </summary>
/// <param name="currentVersion">The current store version. This will be zero on a fresh database initialisation.</param>
/// <param name="targetVersion">The target version which we are migrating to (equal to the current <see cref="StoreVersion"/>).</param>
protected override void PerformMigration(int currentVersion, int targetVersion)
{
base.PerformMigration(currentVersion, targetVersion);
while (currentVersion++ < targetVersion)
{
switch (currentVersion)
{
case 1:
case 2:
// cannot migrate; breaking underlying changes.
Reset();
break;
}
}
}
public FileInfo Add(Stream data)
{
string hash = data.ComputeSHA2Hash();