public Task GarbageCollectionDeletesInLruOrder()
{
var context = new Context(Logger);
var weakFingerprint = Fingerprint.Random();
var selector1 = Selector.Random();
var strongFingerprint1 = new StrongFingerprint(weakFingerprint, selector1);
var contentHashListWithDeterminism1 = new ContentHashListWithDeterminism(ContentHashList.Random(), CacheDeterminism.None);
var selector2 = Selector.Random();
var strongFingerprint2 = new StrongFingerprint(weakFingerprint, selector2);
var contentHashListWithDeterminism2 = new ContentHashListWithDeterminism(ContentHashList.Random(), CacheDeterminism.None);
return(RunTestAsync(context,
funcAsync: async(store, session) => {
await session.AddOrGetContentHashListAsync(context, strongFingerprint1, contentHashListWithDeterminism1, Token).ShouldBeSuccess();
_clock.Increment();
await session.AddOrGetContentHashListAsync(context, strongFingerprint2, contentHashListWithDeterminism2, Token).ShouldBeSuccess();
_clock.Increment();
// Force update the last access time of the first fingerprint
await session.GetContentHashListAsync(context, strongFingerprint1, Token).ShouldBeSuccess();
_clock.Increment();
RocksDbContentLocationDatabase database = (store as RocksDbMemoizationStore)?.RocksDbDatabase;
Contract.Assert(database != null);
var ctx = new OperationContext(context);
database.GarbageCollect(ctx);
var r1 = database.GetContentHashList(ctx, strongFingerprint1).ShouldBeSuccess().ContentHashListWithDeterminism;
r1.Should().BeEquivalentTo(contentHashListWithDeterminism1);
var r2 = database.GetContentHashList(ctx, strongFingerprint2).ShouldBeSuccess().ContentHashListWithDeterminism;
r2.ContentHashList.Should().BeNull();
r2.Determinism.Should().Be(CacheDeterminism.None);
database.Counters[ContentLocationDatabaseCounters.GarbageCollectMetadataEntriesRemoved].Value.Should().Be(1);
database.Counters[ContentLocationDatabaseCounters.GarbageCollectMetadataEntriesScanned].Value.Should().Be(2);
},
createStoreFunc: createStoreInternal));
// This is needed because type errors arise if you inline
IMemoizationStore createStoreInternal(DisposableDirectory disposableDirectory)
{
return(CreateStore(testDirectory: disposableDirectory, configMutator: (configuration) =>
{
configuration.MetadataGarbageCollectionEnabled = true;
configuration.MetadataGarbageCollectionMaximumNumberOfEntriesToKeep = 1;
// Disables automatic GC
configuration.GarbageCollectionInterval = Timeout.InfiniteTimeSpan;
}));
}
}
public Task GarbageCollectionRuns()
{
var context = new Context(Logger);
var weakFingerprint = Fingerprint.Random();
var selector1 = Selector.Random();
var selector2 = Selector.Random();
var strongFingerprint1 = new StrongFingerprint(weakFingerprint, selector1);
var strongFingerprint2 = new StrongFingerprint(weakFingerprint, selector2);
var contentHashListWithDeterminism1 = new ContentHashListWithDeterminism(ContentHashList.Random(), CacheDeterminism.None);
var contentHashListWithDeterminism2 = new ContentHashListWithDeterminism(ContentHashList.Random(), CacheDeterminism.None);
return(RunTestAsync(context,
funcAsync: async(store, session) => {
await session.AddOrGetContentHashListAsync(context, strongFingerprint1, contentHashListWithDeterminism1, Token).ShouldBeSuccess();
_clock.Increment();
// Notice we don't increment the clock here
await session.AddOrGetContentHashListAsync(context, strongFingerprint2, contentHashListWithDeterminism2, Token).ShouldBeSuccess();
RocksDbContentLocationDatabase database = (store as RocksDbMemoizationStore)?.Database;
Contract.Assert(database != null);
var ctx = new OperationContext(context);
database.GarbageCollect(ctx);
var r1 = database.GetContentHashList(ctx, strongFingerprint1).ShouldBeSuccess().ContentHashListWithDeterminism;
r1.ContentHashList.Should().BeNull();
r1.Determinism.Should().Be(CacheDeterminism.None);
var r2 = database.GetContentHashList(ctx, strongFingerprint2).ShouldBeSuccess().ContentHashListWithDeterminism;
r2.Should().BeEquivalentTo(contentHashListWithDeterminism2);
},
createStoreFunc: createStoreInternal));
// This is needed because type errors arise if you inline
IMemoizationStore createStoreInternal(DisposableDirectory disposableDirectory)
{
return(CreateStore(testDirectory: disposableDirectory, configMutator: (configuration) =>
{
configuration.MetadataGarbageCollectionEnabled = true;
configuration.MetadataGarbageCollectionProtectionTime = TimeSpan.FromMilliseconds(1);
// Disables automatic GC
configuration.GarbageCollectionInterval = Timeout.InfiniteTimeSpan;
}));
}
}