public void TestTakeItemTimeout()
{
using (var cache = new DisposableCache <IDisposable>(1))
{
var item = new Mock <IDisposable>().Object;
cache.CacheItem(item);
using (var handle1 = cache.TakeItem())
{
var timeout = TimeSpan.FromMilliseconds(250);
var stopwatch = Stopwatch.StartNew();
try
{
using (var handle2 = cache.TakeItem(timeout))
{ }
Assert.Fail();
}
catch (TimeoutException) { /*expected*/ }
stopwatch.Stop();
// verify the timout period was respected before the exception was thrown
Assert.IsTrue(stopwatch.Elapsed >= timeout);
}
}
}
public EsentBlockStorage(string baseDirectory)
{
this.jetDirectory = Path.Combine(baseDirectory, "Blocks");
this.jetDatabase = Path.Combine(this.jetDirectory, "Blocks.edb");
this.cursorCache = new DisposableCache <EsentBlockCursor>(1024,
createFunc: () => new EsentBlockCursor(this.jetDatabase, this.jetInstance));
this.jetInstance = new Instance(Guid.NewGuid().ToString());
var success = false;
try
{
EsentStorageManager.InitInstanceParameters(jetInstance, jetDirectory);
this.jetInstance.Init();
this.CreateOrOpenDatabase();
success = true;
}
finally
{
if (!success)
{
this.jetInstance.Dispose();
}
}
}
internal MemoryStorageManager(ChainedHeader chainTip = null, int?unspentTxCount = null, int?unspentOutputCount = null, int?totalTxCount = null, int?totalInputCount = null, int?totalOutputCount = null, ImmutableSortedDictionary <UInt256, ChainedHeader> headers = null, ImmutableSortedDictionary <UInt256, UnspentTx> unspentTransactions = null, ImmutableDictionary <int, BlockSpentTxes> spentTransactions = null)
{
blockStorage = new MemoryBlockStorage();
blockTxesStorage = new MemoryBlockTxesStorage();
chainStateStorage = new MemoryChainStateStorage(chainTip, unspentTxCount, unspentOutputCount, totalTxCount, totalInputCount, totalOutputCount, headers, unspentTransactions, spentTransactions);
unconfirmedTxesStorage = new MemoryUnconfirmedTxesStorage();
chainStateCursorCache = new DisposableCache <IChainStateCursor>(1024,
createFunc: () => new MemoryChainStateCursor(chainStateStorage),
prepareAction: cursor =>
{
// rollback any open transaction before returning the cursor to the cache
if (cursor.InTransaction)
{
cursor.RollbackTransaction();
}
});
unconfirmedTxesCursorCache = new DisposableCache <IUnconfirmedTxesCursor>(1024,
createFunc: () => new MemoryUnconfirmedTxesCursor(unconfirmedTxesStorage),
prepareAction: cursor =>
{
// rollback any open transaction before returning the cursor to the cache
if (cursor.InTransaction)
{
cursor.RollbackTransaction();
}
});
}
public LevelDbChainStateManager(string baseDirectory, ulong?cacheSize, ulong?writeCacheSize)
{
this.baseDirectory = baseDirectory;
dbDirectory = Path.Combine(baseDirectory, "ChainState");
db = DB.Open(dbDirectory, cacheSize ?? 0, writeCacheSize ?? 0);
cursorCache = new DisposableCache <IChainStateCursor>(1024,
createFunc: () => new LevelDbChainStateCursor(db, isDeferred: false),
prepareAction: cursor =>
{
// rollback any open transaction before returning the cursor to the cache
if (cursor.InTransaction)
{
cursor.RollbackTransaction();
}
});
deferredCursorCache = new DisposableCache <IDeferredChainStateCursor>(1,
createFunc: () => new LevelDbChainStateCursor(db, isDeferred: true),
prepareAction: cursor =>
{
// rollback any open transaction before returning the cursor to the cache
if (cursor.InTransaction)
{
cursor.RollbackTransaction();
}
});
}
public void TestTakeItemTimeoutFreed()
{
using (var cache = new DisposableCache <IDisposable>(1))
{
var item = new Mock <IDisposable>().Object;
cache.CacheItem(item);
var delay = TimeSpan.FromMilliseconds(50);
var timeout = TimeSpan.FromMilliseconds(5000);
// return the first item after a delay
var handle1 = cache.TakeItem();
Task.Run(() =>
{
using (handle1)
{
Task.Delay(delay).Wait();
}
});
// take a second item and verify it succeeds after the delay has passed
var stopwatch = Stopwatch.StartNew();
using (var handle2 = cache.TakeItem(timeout))
{
stopwatch.Stop();
Assert.IsTrue(stopwatch.Elapsed >= delay);
}
}
}
public EsentChainStateManager(string baseDirectory)
{
this.baseDirectory = baseDirectory;
this.jetDirectory = Path.Combine(baseDirectory, "ChainState");
this.jetDatabase = Path.Combine(this.jetDirectory, "ChainState.edb");
this.jetInstance = new Instance(Guid.NewGuid().ToString());
var success = false;
try
{
EsentStorageManager.InitInstanceParameters(jetInstance, jetDirectory);
this.jetInstance.Init();
this.CreateOrOpenDatabase();
this.cursorCache = new DisposableCache<IChainStateCursor>(1024,
createFunc: () => new EsentChainStateCursor(this.jetDatabase, this.jetInstance),
prepareAction: cursor =>
{
// rollback any open transaction before returning the cursor to the cache
if (cursor.InTransaction)
cursor.RollbackTransaction();
});
success = true;
}
finally
{
if (!success)
{
this.cursorCache?.Dispose();
this.jetInstance.Dispose();
}
}
}
protected virtual void Dispose(bool disposing)
{
if (disposed)
{
return;
}
disposed = true;
if (disposing)
{
// free managed resources
selection.Changed -= HandlePointerChanged;
selection.Collection.Changed -= HandleCollectionChanged;
selection.Collection.ItemsChanged -= HandleCollectionItemsChanged;
ThumbnailLoader.Default.OnPixbufLoaded -= HandlePixbufLoaded;
if (background_pixbuf != null)
{
background_pixbuf.Dispose();
background_pixbuf = null;
}
if (background_tile != null)
{
background_tile.Dispose();
background_tile = null;
}
if (thumb_cache != null)
{
thumb_cache.Dispose();
thumb_cache = null;
}
}
// free unmanaged resources
}
internal MemoryStorageManager(ChainedHeader chainTip = null, int? unspentTxCount = null, int? unspentOutputCount = null, int? totalTxCount = null, int? totalInputCount = null, int? totalOutputCount = null, ImmutableSortedDictionary<UInt256, ChainedHeader> headers = null, ImmutableSortedDictionary<UInt256, UnspentTx> unspentTransactions = null, ImmutableDictionary<int, BlockSpentTxes> spentTransactions = null)
{
blockStorage = new MemoryBlockStorage();
blockTxesStorage = new MemoryBlockTxesStorage();
chainStateStorage = new MemoryChainStateStorage(chainTip, unspentTxCount, unspentOutputCount, totalTxCount, totalInputCount, totalOutputCount, headers, unspentTransactions, spentTransactions);
unconfirmedTxesStorage = new MemoryUnconfirmedTxesStorage();
chainStateCursorCache = new DisposableCache<IChainStateCursor>(1024,
createFunc: () => new MemoryChainStateCursor(chainStateStorage),
prepareAction: cursor =>
{
// rollback any open transaction before returning the cursor to the cache
if (cursor.InTransaction)
cursor.RollbackTransaction();
});
unconfirmedTxesCursorCache = new DisposableCache<IUnconfirmedTxesCursor>(1024,
createFunc: () => new MemoryUnconfirmedTxesCursor(unconfirmedTxesStorage),
prepareAction: cursor =>
{
// rollback any open transaction before returning the cursor to the cache
if (cursor.InTransaction)
cursor.RollbackTransaction();
});
}
public LmdbChainStateManager(string baseDirectory, long chainStateSize)
{
this.baseDirectory = baseDirectory;
this.jetDirectory = Path.Combine(baseDirectory, "ChainState");
this.jetDatabase = Path.Combine(this.jetDirectory, "ChainState.edb");
LmdbStorageManager.PrepareSparseDatabase(this.jetDirectory);
this.jetInstance = new LightningEnvironment(this.jetDirectory, EnvironmentOpenFlags.NoThreadLocalStorage | EnvironmentOpenFlags.NoSync)
{
MaxDatabases = 10,
MapSize = chainStateSize
};
this.jetInstance.Open();
using (var txn = this.jetInstance.BeginTransaction())
{
globalsTableId = txn.OpenDatabase("Globals", new DatabaseOptions { Flags = DatabaseOpenFlags.Create });
headersTableId = txn.OpenDatabase("Headers", new DatabaseOptions { Flags = DatabaseOpenFlags.Create });
unspentTxTableId = txn.OpenDatabase("UnspentTx", new DatabaseOptions { Flags = DatabaseOpenFlags.Create });
blockSpentTxesTableId = txn.OpenDatabase("BlockSpentTxes", new DatabaseOptions { Flags = DatabaseOpenFlags.Create });
blockUnmintedTxesTableId = txn.OpenDatabase("BlockUnmintedTxes", new DatabaseOptions { Flags = DatabaseOpenFlags.Create });
txn.Commit();
}
this.cursorCache = new DisposableCache<IChainStateCursor>(1024,
createFunc: () => new LmdbChainStateCursor(this.jetDatabase, this.jetInstance, globalsTableId, headersTableId, unspentTxTableId, blockSpentTxesTableId, blockUnmintedTxesTableId),
prepareAction: cursor =>
{
// rollback any open transaction before returning the cursor to the cache
if (cursor.InTransaction)
cursor.RollbackTransaction();
});
}
public EsentBlockTxesStorage(string baseDirectory, int? index = null)
{
this.jetDirectory = Path.Combine(baseDirectory, "BlockTxes");
if (index.HasValue)
this.jetDirectory = Path.Combine(jetDirectory, index.Value.ToString());
this.jetDatabase = Path.Combine(this.jetDirectory, "BlockTxes.edb");
this.cursorCache = new DisposableCache<EsentBlockTxesCursor>(1024,
createFunc: () => new EsentBlockTxesCursor(this.jetDatabase, this.jetInstance));
this.jetInstance = new Instance(Guid.NewGuid().ToString());
var success = false;
try
{
EsentStorageManager.InitInstanceParameters(jetInstance, jetDirectory);
this.jetInstance.Init();
this.CreateOrOpenDatabase();
success = true;
}
finally
{
if (!success)
this.jetInstance.Dispose();
}
}
protected virtual void Dispose(bool disposing)
{
if (disposed)
{
return;
}
disposed = true;
if (disposing)
{
// free managed resources
selection.Changed -= HandlePointerChanged;
// FIXME, observable collections
//selection.Collection.Changed -= HandleCollectionChanged;
//selection.Collection.ItemsChanged -= HandleCollectionItemsChanged;
App.Instance.Container.Resolve <IThumbnailLoader> ().OnPixbufLoaded -= HandlePixbufLoaded;
if (background_pixbuf != null)
{
background_pixbuf.Dispose();
background_pixbuf = null;
}
if (background_tile != null)
{
background_tile.Dispose();
background_tile = null;
}
if (thumb_cache != null)
{
thumb_cache.Dispose();
thumb_cache = null;
}
}
// free unmanaged resources
}
public LevelDbChainStateManager(string baseDirectory, ulong? cacheSize, ulong? writeCacheSize)
{
this.baseDirectory = baseDirectory;
dbDirectory = Path.Combine(baseDirectory, "ChainState");
db = DB.Open(dbDirectory, cacheSize ?? 0, writeCacheSize ?? 0);
cursorCache = new DisposableCache<IChainStateCursor>(1024,
createFunc: () => new LevelDbChainStateCursor(db, isDeferred: false),
prepareAction: cursor =>
{
// rollback any open transaction before returning the cursor to the cache
if (cursor.InTransaction)
cursor.RollbackTransaction();
});
deferredCursorCache = new DisposableCache<IDeferredChainStateCursor>(1,
createFunc: () => new LevelDbChainStateCursor(db, isDeferred: true),
prepareAction: cursor =>
{
// rollback any open transaction before returning the cursor to the cache
if (cursor.InTransaction)
cursor.RollbackTransaction();
});
}
public void TestTakeItem()
{
var openCount = 0;
var disposeCount = 0;
Func<IDisposable> createFunc =
() =>
{
var disposable = new Mock<IDisposable>();
disposable.Setup(x => x.Dispose())
.Callback(() => disposeCount++);
openCount++;
return disposable.Object;
};
// create a cache with a capacity of 2
using (var cache = new DisposableCache<IDisposable>(2, createFunc))
{
Assert.AreEqual(0, openCount);
Assert.AreEqual(0, disposeCount);
// take 3 items, 1 should be disposed when it is returned
using (var handle1 = cache.TakeItem())
{
Assert.AreEqual(1, openCount);
Assert.AreEqual(0, disposeCount);
using (var handle2 = cache.TakeItem())
{
Assert.AreEqual(2, openCount);
Assert.AreEqual(0, disposeCount);
using (var handle3 = cache.TakeItem())
{
Assert.AreEqual(3, openCount);
Assert.AreEqual(0, disposeCount);
}
Assert.AreEqual(3, openCount);
Assert.AreEqual(0, disposeCount);
}
Assert.AreEqual(3, openCount);
Assert.AreEqual(0, disposeCount);
}
// verify final item was disposed as the cache was full
Assert.AreEqual(3, openCount);
Assert.AreEqual(1, disposeCount);
}
// now that cache is disposed, remaining two items should have been disposed
Assert.AreEqual(3, openCount);
Assert.AreEqual(3, disposeCount);
}
public void TestTakeItem()
{
var openCount = 0;
var disposeCount = 0;
Func <IDisposable> createFunc =
() =>
{
var disposable = new Mock <IDisposable>();
disposable.Setup(x => x.Dispose())
.Callback(() => disposeCount++);
openCount++;
return(disposable.Object);
};
// create a cache with a capacity of 2
using (var cache = new DisposableCache <IDisposable>(2, createFunc))
{
Assert.AreEqual(0, openCount);
Assert.AreEqual(0, disposeCount);
// take 3 items, 1 should be disposed when it is returned
using (var handle1 = cache.TakeItem())
{
Assert.AreEqual(1, openCount);
Assert.AreEqual(0, disposeCount);
using (var handle2 = cache.TakeItem())
{
Assert.AreEqual(2, openCount);
Assert.AreEqual(0, disposeCount);
using (var handle3 = cache.TakeItem())
{
Assert.AreEqual(3, openCount);
Assert.AreEqual(0, disposeCount);
}
Assert.AreEqual(3, openCount);
Assert.AreEqual(0, disposeCount);
}
Assert.AreEqual(3, openCount);
Assert.AreEqual(0, disposeCount);
}
// verify final item was disposed as the cache was full
Assert.AreEqual(3, openCount);
Assert.AreEqual(1, disposeCount);
}
// now that cache is disposed, remaining two items should have been disposed
Assert.AreEqual(3, openCount);
Assert.AreEqual(3, disposeCount);
}
public Filmstrip(FSpot.BrowsablePointer selection, bool squared_thumbs) : base()
{
CanFocus = true;
this.selection = selection;
this.selection.Changed += HandlePointerChanged;
this.selection.Collection.Changed += HandleCollectionChanged;
this.selection.Collection.ItemsChanged += HandleCollectionItemsChanged;
this.squared_thumbs = squared_thumbs;
thumb_cache = new DisposableCache <string, Pixbuf> (30);
ThumbnailGenerator.Default.OnPixbufLoaded += HandlePixbufLoaded;
}
public void AircraftOnlineLookupManager_Dispose_Does_Not_Dispose_Of_Unmanaged_Caches()
{
var manager = Factory.Singleton.Resolve <IAircraftOnlineLookupManager>();
var disposableCache = new DisposableCache();
manager.RegisterCache(disposableCache, 1, letManagerControlLifetime: false);
manager.Dispose();
Assert.AreEqual(0, disposableCache.DisposeCallCount);
}
public void AircraftOnlineLookupManager_Dispose_Disposes_Of_Managed_Caches()
{
var manager = Factory.Singleton.ResolveNewInstance <IAircraftOnlineLookupManager>();
var disposableCache = new DisposableCache();
manager.RegisterCache(disposableCache, 1, letManagerControlLifetime: true);
manager.Dispose();
Assert.AreEqual(1, disposableCache.DisposeCallCount);
}
protected virtual void Dispose(bool disposing)
{
if (disposing)
{
// free managed resources
if (preview_cache != null)
{
preview_cache.Dispose();
preview_cache = null;
}
}
// free unmanaged resources
}
public void CacheSetDisposesCorrectly()
{
var disposableCache = new DisposableCache();
var client = new KerberosClient()
{
Cache = disposableCache
};
client.Cache = new DisposableCache();
Assert.IsTrue(disposableCache.Disposed);
}
public Filmstrip(BrowsablePointer selection, bool squaredThumbs)
{
CanFocus = true;
this.selection = selection;
this.selection.Changed += HandlePointerChanged;
this.selection.Collection.Changed += HandleCollectionChanged;
this.selection.Collection.ItemsChanged += HandleCollectionItemsChanged;
SquaredThumbs = squaredThumbs;
thumb_cache = new DisposableCache <SafeUri, Pixbuf> (30);
ThumbnailLoader.Default.OnPixbufLoaded += HandlePixbufLoaded;
animation = new DoubleAnimation(0, 0, TimeSpan.FromSeconds(1.5), SetPositionCore, new CubicEase(EasingMode.EaseOut));
}
public void ShouldDisposeUnderlyingCache()
{
// Arrange
var actual = new DisposableCache();
var sut = Create(actual);
Expect(actual.Disposed)
.To.Be.False();
// Act
sut.Dispose();
// Assert
Expect(actual.Disposed)
.To.Be.True();
}
public Filmstrip(BrowsablePointer selection, bool squaredThumbs)
{
CanFocus = true;
this.selection = selection;
this.selection.Changed += HandlePointerChanged;
// FIXME, ObservableCollection
//this.selection.Collection.Changed += HandleCollectionChanged;
//this.selection.Collection.ItemsChanged += HandleCollectionItemsChanged;
SquaredThumbs = squaredThumbs;
thumb_cache = new DisposableCache <Uri, Pixbuf> (30);
App.Instance.Container.Resolve <IThumbnailLoader> ().OnPixbufLoaded += HandlePixbufLoaded;
animation = new DoubleAnimation(0, 0, TimeSpan.FromSeconds(1.5), SetPositionCore, new CubicEase(EasingMode.EaseOut));
}
public void TestTakeItemExhausted()
{
using (var cache = new DisposableCache <IDisposable>(1))
{
var item = new Mock <IDisposable>().Object;
cache.CacheItem(item);
using (var handle1 = cache.TakeItem())
{
using (var handle2 = cache.TakeItem())
{
}
}
}
}
public void TestTakeItemExhausted()
{
using (var cache = new DisposableCache<IDisposable>(1))
using (var taker1Taken = new AutoResetEvent(false))
using (var taker1Finish = new AutoResetEvent(false))
using (var taker2Started = new AutoResetEvent(false))
using (var taker2Taken = new AutoResetEvent(false))
{
var item = new Mock<IDisposable>().Object;
cache.CacheItem(item);
var taker1 = Task.Run(() =>
{
using (var handle1 = cache.TakeItem())
{
taker1Taken.Set();
taker1Finish.WaitOne();
}
});
// wait for taker 1 to retrieve a cached item
taker1Taken.WaitOne();
var taker2 = Task.Run(() =>
{
taker2Started.Set();
using (var handle2 = cache.TakeItem())
{
taker2Taken.Set();
}
});
// wait for taker 2 to start
Assert.IsTrue(taker2Started.WaitOne(2000));
// verify taker 2 hasn't been able to retrieve a cached item
Assert.IsFalse(taker2Taken.WaitOne(500));
// allow taker 1 to return its cached item
taker1Finish.Set();
Assert.IsTrue(taker1.Wait(2000));
// verify taker 2 then retrieves a cached item
Assert.IsTrue(taker2Taken.WaitOne(2000));
Assert.IsTrue(taker2.Wait(2000));
}
}
public void TestTakeItemExhausted()
{
using (var cache = new DisposableCache <IDisposable>(1))
using (var taker1Taken = new AutoResetEvent(false))
using (var taker1Finish = new AutoResetEvent(false))
using (var taker2Started = new AutoResetEvent(false))
using (var taker2Taken = new AutoResetEvent(false))
{
var item = new Mock <IDisposable>().Object;
cache.CacheItem(item);
var taker1 = Task.Run(() =>
{
using (var handle1 = cache.TakeItem())
{
taker1Taken.Set();
taker1Finish.WaitOne();
}
});
// wait for taker 1 to retrieve a cached item
taker1Taken.WaitOne();
var taker2 = Task.Run(() =>
{
taker2Started.Set();
using (var handle2 = cache.TakeItem())
{
taker2Taken.Set();
}
});
// wait for taker 2 to start
Assert.IsTrue(taker2Started.WaitOne(2000));
// verify taker 2 hasn't been able to retrieve a cached item
Assert.IsFalse(taker2Taken.WaitOne(500));
// allow taker 1 to return its cached item
taker1Finish.Set();
Assert.IsTrue(taker1.Wait(2000));
// verify taker 2 then retrieves a cached item
Assert.IsTrue(taker2Taken.WaitOne(2000));
Assert.IsTrue(taker2.Wait(2000));
}
}
public ChainState(Chain chain, IStorageManager storageManager)
{
CursorCount = Environment.ProcessorCount;
Chain = chain;
// create a cache of cursors that are in an open snapshot transaction with the current chain state
var success = false;
this.cursorCache = new DisposableCache <DisposeHandle <IChainStateCursor> >(CursorCount);
try
{
for (var i = 0; i < this.cursorCache.Capacity; i++)
{
// open the cursor
var handle = storageManager.OpenChainStateCursor();
var cursor = handle.Item;
// cache the cursor
// this must be done before beginning the transaction as caching will rollback any transactions
this.cursorCache.CacheItem(handle);
// begin transaction to take the snapshot
cursor.BeginTransaction(readOnly: true);
// verify the chain state matches the expected chain
var chainTip = cursor.ChainTip;
if (chainTip?.Hash != chain.LastBlock?.Hash)
{
throw new ChainStateOutOfSyncException(chain.LastBlock, chainTip);
}
}
success = true;
}
finally
{
// ensure any opened cursors are cleaned up on an error
if (!success)
{
this.cursorCache.Dispose();
}
}
}
public BlockTxesStorage(string baseDirectory, Logger logger)
{
this.logger = logger;
this.jetDirectory = Path.Combine(baseDirectory, "BlockTxes");
this.jetDatabase = Path.Combine(this.jetDirectory, "BlockTxes.edb");
this.cursorCache = new DisposableCache <BlockTxesCursor>(64,
createFunc: () => new BlockTxesCursor(this.jetDatabase, this.jetInstance));
this.jetInstance = CreateInstance(this.jetDirectory);
try
{
this.jetInstance.Init();
this.CreateOrOpenDatabase();
}
catch (Exception)
{
this.jetInstance.Dispose();
throw;
}
}
public EsentChainStateManager(string baseDirectory)
{
this.baseDirectory = baseDirectory;
this.jetDirectory = Path.Combine(baseDirectory, "ChainState");
this.jetDatabase = Path.Combine(this.jetDirectory, "ChainState.edb");
this.jetInstance = new Instance(Guid.NewGuid().ToString());
var success = false;
try
{
EsentStorageManager.InitInstanceParameters(jetInstance, jetDirectory);
this.jetInstance.Init();
this.CreateOrOpenDatabase();
this.cursorCache = new DisposableCache <IChainStateCursor>(1024,
createFunc: () => new EsentChainStateCursor(this.jetDatabase, this.jetInstance),
prepareAction: cursor =>
{
// rollback any open transaction before returning the cursor to the cache
if (cursor.InTransaction)
{
cursor.RollbackTransaction();
}
});
success = true;
}
finally
{
if (!success)
{
this.cursorCache?.Dispose();
this.jetInstance.Dispose();
}
}
}
public ChainState(Chain chain, IStorageManager storageManager)
{
CursorCount = Environment.ProcessorCount;
Chain = chain;
// create a cache of cursors that are in an open snapshot transaction with the current chain state
var success = false;
this.cursorCache = new DisposableCache<DisposeHandle<IChainStateCursor>>(CursorCount);
try
{
for (var i = 0; i < this.cursorCache.Capacity; i++)
{
// open the cursor
var handle = storageManager.OpenChainStateCursor();
var cursor = handle.Item;
// cache the cursor
// this must be done before beginning the transaction as caching will rollback any transactions
this.cursorCache.CacheItem(handle);
// begin transaction to take the snapshot
cursor.BeginTransaction(readOnly: true);
// verify the chain state matches the expected chain
var chainTip = cursor.ChainTip;
if (chainTip?.Hash != chain.LastBlock?.Hash)
throw new ChainStateOutOfSyncException(chain.LastBlock, chainTip);
}
success = true;
}
finally
{
// ensure any opened cursors are cleaned up on an error
if (!success)
this.cursorCache.Dispose();
}
}
public EsentChainStateManager(string baseDirectory, Logger logger)
{
this.logger = logger;
this.baseDirectory = baseDirectory;
this.jetDirectory = Path.Combine(baseDirectory, "ChainState");
this.jetDatabase = Path.Combine(this.jetDirectory, "ChainState.edb");
this.jetInstance = CreateInstance(this.jetDirectory);
this.jetInstance.Init();
this.CreateOrOpenDatabase();
this.cursorCache = new DisposableCache <IChainStateCursor>(64,
createFunc: () => new ChainStateCursor(this.jetDatabase, this.jetInstance, this.logger),
prepareAction: cursor =>
{
// rollback any open transaction before returning the cursor to the cache
if (cursor.InTransaction)
{
cursor.RollbackTransaction();
}
});
}
public ChainState(Chain chain, IStorageManager storageManager)
{
this.chain = chain;
// create a cache of cursors that are in an open snapshot transaction with the current chain state
this.cursorCache = new DisposableCache <DisposeHandle <IChainStateCursor> >(16);
try
{
for (var i = 0; i < this.cursorCache.Capacity; i++)
{
// open the cursor
var handle = storageManager.OpenChainStateCursor();
var cursor = handle.Item;
// cache the cursor
// this must be done before beginning the transaction as caching will rollback any transactions
this.cursorCache.CacheItem(handle);
// begin transaction to take the snapshot
cursor.BeginTransaction();
// verify the chain state matches the expected chain
var chainTip = cursor.GetChainTip();
if (chainTip != chain.LastBlock)
{
throw new InvalidOperationException();
}
}
}
catch (Exception)
{
// ensure any opened cursors are cleaned up on an error
this.cursorCache.Dispose();
throw;
}
}
private async Task PruneTxIndexAsync(PruningMode mode, Chain chain, ChainedHeader pruneBlock, BlockSpentTxes spentTxes)
{
if (!mode.HasFlag(PruningMode.TxIndex))
{
return;
}
var maxParallelism = Environment.ProcessorCount;
// prepare a cache of cursors to be used by the pruning action block, allowing a pool of transactions
var openedCursors = new ConcurrentBag <IChainStateCursor>();
using (var cursorHandles = new DisposableCache <DisposeHandle <IChainStateCursor> >(maxParallelism,
() =>
{
// retrieve a new cursor and start its transaction, keeping track of any cursors opened
var cursorHandle = this.storageManager.OpenChainStateCursor();
cursorHandle.Item.BeginTransaction();
openedCursors.Add(cursorHandle.Item);
return(cursorHandle);
}))
{
var pruneTxIndex = new ActionBlock <SpentTx>(
spentTx =>
{
using (var handle = cursorHandles.TakeItem())
{
var chainStateCursor = handle.Item.Item;
chainStateCursor.RemoveUnspentTx(spentTx.TxHash);
for (var outputIndex = 0; outputIndex < spentTx.OutputCount; outputIndex++)
{
chainStateCursor.RemoveUnspentTxOutput(new TxOutputKey(spentTx.TxHash, (uint)outputIndex));
}
}
},
new ExecutionDataflowBlockOptions {
MaxDegreeOfParallelism = maxParallelism
});
var spentTxesQueue = new BufferBlock <SpentTx>();
spentTxesQueue.LinkTo(pruneTxIndex, new DataflowLinkOptions {
PropagateCompletion = true
});
await spentTxesQueue.SendAndCompleteAsync(spentTxes);
await pruneTxIndex.Completion;
// commit all opened cursors on success
var commitTasks = new Task[openedCursors.Count];
var i = 0;
foreach (var cursor in openedCursors)
{
commitTasks[i++] = cursor.CommitTransactionAsync();
}
await Task.WhenAll(commitTasks);
}
}
protected virtual void Dispose(bool disposing)
{
if (disposing) {
// free managed resources
if (preview_cache != null) {
preview_cache.Dispose ();
preview_cache = null;
}
}
// free unmanaged resources
}
public Filmstrip(BrowsablePointer selection, bool squaredThumbs)
{
CanFocus = true;
this.selection = selection;
this.selection.Changed += HandlePointerChanged;
this.selection.Collection.Changed += HandleCollectionChanged;
this.selection.Collection.ItemsChanged += HandleCollectionItemsChanged;
SquaredThumbs = squaredThumbs;
thumb_cache = new DisposableCache<SafeUri, Pixbuf> (30);
ThumbnailLoader.Default.OnPixbufLoaded += HandlePixbufLoaded;
animation = new DoubleAnimation (0, 0, TimeSpan.FromSeconds (1.5), SetPositionCore, new CubicEase (EasingMode.EaseOut));
}
protected virtual void Dispose(bool disposing)
{
if (disposed)
return;
disposed = true;
if (disposing) {
// free managed resources
selection.Changed -= HandlePointerChanged;
selection.Collection.Changed -= HandleCollectionChanged;
selection.Collection.ItemsChanged -= HandleCollectionItemsChanged;
ThumbnailLoader.Default.OnPixbufLoaded -= HandlePixbufLoaded;
if (background_pixbuf != null) {
background_pixbuf.Dispose ();
background_pixbuf = null;
}
if (background_tile != null) {
background_tile.Dispose ();
background_tile = null;
}
if (thumb_cache != null) {
thumb_cache.Dispose ();
thumb_cache = null;
}
}
// free unmanaged resources
}
private async Task PruneTxIndexAsync(PruningMode mode, Chain chain, ChainedHeader pruneBlock, BlockSpentTxes spentTxes)
{
if (!mode.HasFlag(PruningMode.TxIndex))
return;
var maxParallelism = Environment.ProcessorCount;
// prepare a cache of cursors to be used by the pruning action block, allowing a pool of transactions
var openedCursors = new ConcurrentBag<IChainStateCursor>();
using (var cursorHandles = new DisposableCache<DisposeHandle<IChainStateCursor>>(maxParallelism,
() =>
{
// retrieve a new cursor and start its transaction, keeping track of any cursors opened
var cursorHandle = this.storageManager.OpenChainStateCursor();
cursorHandle.Item.BeginTransaction(pruneOnly: true);
openedCursors.Add(cursorHandle.Item);
return cursorHandle;
}))
{
var pruneTxIndex = new ActionBlock<SpentTx>(
spentTx =>
{
using (var handle = cursorHandles.TakeItem())
{
var chainStateCursor = handle.Item.Item;
chainStateCursor.TryRemoveUnspentTx(spentTx.TxHash);
}
},
new ExecutionDataflowBlockOptions { MaxDegreeOfParallelism = maxParallelism });
var spentTxesQueue = new BufferBlock<SpentTx>();
spentTxesQueue.LinkTo(pruneTxIndex, new DataflowLinkOptions { PropagateCompletion = true });
await spentTxesQueue.SendAndCompleteAsync(spentTxes);
await pruneTxIndex.Completion;
// commit all opened cursors on success
Parallel.ForEach(openedCursors, cursor =>
cursor.CommitTransaction());
}
}
public void TestTakeItemTimeout()
{
using (var cache = new DisposableCache<IDisposable>(1))
{
var item = new Mock<IDisposable>().Object;
cache.CacheItem(item);
using (var handle1 = cache.TakeItem())
{
var timeout = TimeSpan.FromMilliseconds(250);
var stopwatch = Stopwatch.StartNew();
try
{
using (var handle2 = cache.TakeItem(timeout))
{ }
Assert.Fail();
}
catch (TimeoutException) { /*expected*/ }
stopwatch.Stop();
// verify the timout period was respected before the exception was thrown
Assert.IsTrue(stopwatch.Elapsed >= timeout);
}
}
}
public Filmstrip (FSpot.BrowsablePointer selection, bool squared_thumbs) : base ()
{
CanFocus = true;
this.selection = selection;
this.selection.Changed += HandlePointerChanged;
this.selection.Collection.Changed += HandleCollectionChanged;
this.selection.Collection.ItemsChanged += HandleCollectionItemsChanged;
this.squared_thumbs = squared_thumbs;
thumb_cache = new DisposableCache<string, Pixbuf> (30);
ThumbnailGenerator.Default.OnPixbufLoaded += HandlePixbufLoaded;
}
public void TestTakeItemTimeoutFreed()
{
using (var cache = new DisposableCache<IDisposable>(1))
{
var item = new Mock<IDisposable>().Object;
cache.CacheItem(item);
var delay = TimeSpan.FromMilliseconds(50);
var timeout = TimeSpan.FromMilliseconds(5000);
// return the first item after a delay
var handle1 = cache.TakeItem();
Task.Run(() =>
{
using (handle1)
{
Task.Delay(delay).Wait();
}
});
// take a second item and verify it succeeds after the delay has passed
var stopwatch = Stopwatch.StartNew();
using (var handle2 = cache.TakeItem(timeout))
{
stopwatch.Stop();
Assert.IsTrue(stopwatch.Elapsed >= delay);
}
}
}
