public async Task CanOpenAndCloseWithUpdate()
{
var storage = await NewStorageAsync();
var name = storage.Name;
var str1 = "test1";
var str2 = "test2";
var s1 = new MemoryStream(Encoding.UTF8.GetBytes(str1));
var s2 = new MemoryStream(Encoding.UTF8.GetBytes(str2));
var writeBatch = new WriteBatch();
writeBatch.Put("A", s1);
await storage.Writer.WriteAsync(writeBatch);
writeBatch = new WriteBatch();
writeBatch.Put("A", s2);
await storage.Writer.WriteAsync(writeBatch);
var fileSystem = storage.StorageState.FileSystem;
storage.Dispose();
using (var newStorage = new Storage(new StorageState(name, new StorageOptions())
{
FileSystem = fileSystem
}))
{
await newStorage.InitAsync();
AssertEqual(str2, newStorage.Reader.Read("A"));
}
}
public async Task CanGetLatestVersion()
{
var storage = await NewStorageAsync();
var name = storage.Name;
for (int j = 0; j < 3; j++)
{
for (int i = 0; i < 65; i++)
{
for (int k = 0; k < 4; k++)
{
var writeBatch = new WriteBatch();
writeBatch.Put("A" + k, new MemoryStream(new[] { (byte)i, (byte)k }));
await storage.Writer.WriteAsync(writeBatch);
}
}
}
var fileSystem = storage.StorageState.FileSystem;
storage.Dispose();
using (var newStorage = new Storage(new StorageState(name, new StorageOptions())
{
FileSystem = fileSystem
}))
{
await newStorage.InitAsync();
var stream = newStorage.Reader.Read("A2");
Assert.Equal(64, stream.ReadByte());
}
}
public async Task ShouldRecoverDataFromLogFile()
{
var storage = await NewStorageAsync();
var name = storage.Name;
var writeBatch = new WriteBatch();
writeBatch.Put("A", new MemoryStream(Encoding.UTF8.GetBytes("123")));
writeBatch.Put("B", new MemoryStream(Encoding.UTF8.GetBytes("123")));
writeBatch.Put("D", new MemoryStream(Encoding.UTF8.GetBytes("123")));
storage.Writer.WriteAsync(writeBatch).Wait();
var fileSystem = storage.StorageState.FileSystem;
storage.Dispose();
using (var newStorage = new Storage(new StorageState(name, new StorageOptions())
{
FileSystem = fileSystem
}))
{
await newStorage.InitAsync();
using(var it = newStorage.Reader.NewIterator(new ReadOptions()))
{
it.Seek("C");
Assert.True(it.IsValid);
it.Prev();
Assert.True(it.IsValid);
Assert.Equal("B", it.Key);
}
}
}
private async Task OpenAsync()
{
if (!options.UseExistingDatabase)
Close();
Debug.Assert(!string.IsNullOrEmpty(options.DatabaseName));
Debug.Assert(storage == null);
var filterPolicy = options.BloomBits >= 0 ? new BloomFilterPolicy(options.BloomBits) : null;
var storageOptions = new StorageOptions
{
CreateIfMissing = !options.UseExistingDatabase,
WriteBatchSize = options.WriteBatchSize,
FilterPolicy = filterPolicy,
//Comparator = new ByteWiseComparator()
};
if (options.CacheSize > 0)
{
storageOptions.CacheSizeInMegabytes = options.CacheSize;
}
storage = new Storage(options.DatabaseName, storageOptions);
await storage.InitAsync();
}