public void IndexClean()
{
string path = Path.GetFullPath("TestData\\IndexClean");
using (var db = new KeyValueStore(path)) {
db.Truncate();
db.Manifest.Logger = msg => Console.WriteLine(msg);
db.Set(Encoding.UTF8.GetBytes("KeyA"), Encoding.UTF8.GetBytes("ValueA:1"), new Dictionary <string, byte[]> {
{ "Idx", Encoding.UTF8.GetBytes("1") }
});
db.Set(Encoding.UTF8.GetBytes("KeyB"), Encoding.UTF8.GetBytes("ValueB:2"), new Dictionary <string, byte[]> {
{ "Idx", Encoding.UTF8.GetBytes("2") }
});
db.Set(Encoding.UTF8.GetBytes("KeyC"), Encoding.UTF8.GetBytes("ValueC:3"), new Dictionary <string, byte[]> {
{ "Idx", Encoding.UTF8.GetBytes("3") }
});
var lookupValue = db.Find("Idx", Encoding.UTF8.GetBytes("3")).Single();
Assert.AreEqual("ValueC:3", Encoding.UTF8.GetString(lookupValue.Value));
Assert.AreEqual("KeyC", Encoding.UTF8.GetString(lookupValue.Key));
db.Delete(Encoding.UTF8.GetBytes("KeyC"));
}
// Open the index directly and confirm that the lookup key is still there
using (var db = new KeyValueStore(Path.Combine(path, "Idx"))) Assert.AreEqual(3, db.Enumerate().Count());
using (var db = new KeyValueStore(path)) db.CleanIndex("Idx");
// Open the index directly and confirm that the lookup key is now gone
using (var db = new KeyValueStore(Path.Combine(path, "Idx"))) Assert.AreEqual(2, db.Enumerate().Count());
}
public void ShouldBeAbleToDelete()
{
var version = Kvs.Overwrite(Key, RandomValue, DefaultTransaction);
var newDeletedVersion = Kvs.Delete(Key, version, DefaultTransaction);
var isExceptionRaised = false;
try
{
Kvs.Read(Key);
}
catch (ArgumentException)
{
isExceptionRaised = true;
}
Assert.AreEqual(isExceptionRaised, true);
}
public void RemoveDeletedValuesFromIndex()
{
string path = Path.GetFullPath("TestData\\RemoveDeletedValuesFromIndex");
var timer = new Stopwatch();
using (var db = new KeyValueStore(path)) {
db.Truncate();
int totalSize = 0;
db.Manifest.Logger = msg => Console.WriteLine(msg);
var indexed = new SortedDictionary <string, byte[]>();
int num_items = 1000;
timer.Start();
for (int i = 0; i < num_items; i++)
{
indexed["Mod"] = BitConverter.GetBytes(i % 100);
db.Set(BitConverter.GetBytes(i), BitConverter.GetBytes(i), indexed);
totalSize += 8 + 4;
}
timer.Stop();
Console.WriteLine("Wrote data (with indexing) at a throughput of {0} MB/s", (double)totalSize / timer.Elapsed.TotalSeconds / (1024.0 * 1024.0));
timer.Reset();
timer.Start();
var ctModZeros = db.Find("Mod", BitConverter.GetBytes((int)0)).Count();
timer.Stop();
Assert.AreEqual(10, ctModZeros);
Console.WriteLine("Scanned index at a throughput of {0} items/s", (double)ctModZeros / timer.Elapsed.TotalSeconds);
}
// Open the index directly and see if the data is there
using (var db = new KeyValueStore(Path.Combine(path, "Mod"))) {
int num_vals = db.EnumerateFromKey(BitConverter.GetBytes((int)0)).Count(pair => pair.Key.Take(4).All(b => b == 0));
Assert.AreEqual(10, num_vals);
}
// Re-open the main key-value store and delete the value at 30
using (var db = new KeyValueStore(path)) {
db.Delete(BitConverter.GetBytes(200));
// Clean the data from the index
db.RemoveFromIndex(BitConverter.GetBytes(200), new Dictionary <string, byte[]> {
{ "Mod", BitConverter.GetBytes(200 % 100) }
});
}
// Open the index again directly and confirm that the lookup key is gone now as well
using (var db = new KeyValueStore(Path.Combine(path, "Mod"))) {
int num_vals = db.EnumerateFromKey(BitConverter.GetBytes((int)0)).Count(pair => pair.Key.Take(4).All(b => b == 0));
Assert.AreEqual(9, num_vals);
}
}
public void DeleteMany()
{
KeyBytes[] nonExistentKeys = Enumerable.Range(0, 10)
.Select(_ => NewRandomKey())
.ToArray();
KeyBytes[] keys = PreStoredDataKeys
.Concat(PreStoredDataKeys.Take(PreStoredDataCount / 2))
.Concat(nonExistentKeys)
.ToArray();
KeyValueStore.Delete(keys);
Assert.All(keys, k => Assert.False(KeyValueStore.Exists(k)));
}
public void Delete()
{
foreach (KeyBytes key in PreStoredDataKeys)
{
KeyValueStore.Delete(key);
Assert.False(KeyValueStore.Exists(key));
}
KeyBytes nonExistent = NewRandomKey();
KeyValueStore.Delete(nonExistent);
Assert.False(KeyValueStore.Exists(nonExistent));
}
static void Main(string[] args)
{
#region Alpha
Console.WriteLine("===================================================");
Console.WriteLine("Key Value Store Basic");
Console.WriteLine("===================================================");
Console.WriteLine();
var dictionary = new KeyValueStore <string, int>();
Console.WriteLine("Get a non existing key and check value");
var result = dictionary.Get("a");
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine($"Value for key A is { ConvertToString(result) }");
Console.WriteLine();
Console.ForegroundColor = ConsoleColor.White;
Console.WriteLine("Set a keyvalue pair with Key==A and Value==10");
Console.WriteLine();
dictionary.Set("a", 10);
result = dictionary.Get("a");
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine($"The value for key A is { ConvertToString(result) }");
Console.WriteLine();
Console.ForegroundColor = ConsoleColor.White;
Console.WriteLine("Set a keyvalue pair with Key==B and Value==10");
Console.WriteLine();
dictionary.Set("b", 10);
var cnt = dictionary.Count(10);
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine($"Number of times the value 10 occured was { cnt }");
Console.WriteLine();
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine($"Delete Key C");
dictionary.Delete("c");
Console.WriteLine($"Delete Key B");
dictionary.Delete("b");
Console.WriteLine();
cnt = dictionary.Count(10);
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine($"Number of times the value 10 occured was { cnt }");
Console.WriteLine();
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine("Update key A value to 20");
Console.WriteLine();
dictionary.Set("a", 20);
Console.ForegroundColor = ConsoleColor.Green;
cnt = dictionary.Count(10);
Console.WriteLine($"Number of times 10 occured was { cnt }");
cnt = dictionary.Count(20);
Console.WriteLine($"Number of times 20 occured was { cnt }");
Console.WriteLine();
Console.ForegroundColor = ConsoleColor.Black;
Console.BackgroundColor = ConsoleColor.White;
Console.WriteLine(dictionary.End());
Console.ForegroundColor = ConsoleColor.White;
Console.BackgroundColor = ConsoleColor.Black;
Console.WriteLine("===================================================");
Console.WriteLine("===================================================");
Console.WriteLine();
#endregion
#region Beta
//Console.WriteLine("===================================================");
//Console.WriteLine("Key Value Store Transaction");
//Console.WriteLine("===================================================");
//Console.WriteLine();
//var mainDictionary = new KeyValueStore<string, int>();
//using (var scope = new TransactionService<string, int>(mainDictionary))
//{
// Console.WriteLine("Begin TransAction");
// scope.Begin();
// Console.WriteLine("Set a keyvalue pair with Key==A and Value==10");
// scope.CurrentStore.Set("a", 10);
// Console.WriteLine("Try Commit Transaction");
// Console.WriteLine();
// IsTransactionSuccesful(scope.Committed());
//}
//var transActionResult = mainDictionary.Get("a");
//Console.ForegroundColor = ConsoleColor.Green;
//Console.WriteLine($"The value for key A is { ConvertToString(transActionResult) }");
//Console.WriteLine();
//Console.ForegroundColor = ConsoleColor.White;
//Console.BackgroundColor = ConsoleColor.Black;
//Console.WriteLine("===================================================");
//Console.WriteLine("===================================================");
//Console.WriteLine();
#endregion
#region Charlie
//Console.WriteLine("===================================================");
//Console.WriteLine("Key Value Store Transaction");
//Console.WriteLine("===================================================");
//Console.WriteLine();
//var mainDictionary = new KeyValueStore<string, int>();
//using (var scope = new TransactionService<string, int>(mainDictionary))
//{
// Console.WriteLine("Begin TransAction");
// scope.Begin();
// Console.WriteLine("Set a keyvalue pair with Key==A and Value==20");
// scope.CurrentStore.Set("a", 20);
// Console.WriteLine("Try Rollback Transaction");
// Console.WriteLine();
// IsTransactionSuccesful(scope.RollBack()); //Can also just not do anything as using will invoke dispose at end and will auto rollback with no commit
//}
//var transActionResult = mainDictionary.Get("a");
//Console.ForegroundColor = ConsoleColor.Green;
//Console.WriteLine($"The value for key A is { ConvertToString(transActionResult) }");
//Console.WriteLine();
//Console.ForegroundColor = ConsoleColor.White;
//Console.BackgroundColor = ConsoleColor.Black;
//Console.WriteLine("===================================================");
//Console.WriteLine("===================================================");
//Console.WriteLine();
#endregion
#region Delta
Console.WriteLine("===================================================");
Console.WriteLine("Key Value Store Transaction");
Console.WriteLine("===================================================");
Console.WriteLine();
var mainDictionary = new KeyValueStore <string, int>();
using (var scope = new TransactionService <string, int>(mainDictionary))
{
Console.WriteLine("Begin Transaction");
scope.Begin();
Console.ForegroundColor = ConsoleColor.White;
Console.WriteLine("Set a keyvalue pair with Key==A and Value==20");
Console.WriteLine();
scope.CurrentStore.Set("a", 20);
using (var transaction = new TransactionService <string, int>(scope.MainStore))
{
Console.WriteLine("Begin 2nd Transaction");
transaction.Begin();
Console.WriteLine("Set a keyvalue pair with Key==A and Value==50");
Console.WriteLine();
transaction.CurrentStore.Set("a", 50);
var value = transaction.CurrentStore.Get("a");
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine($"The value for key A is { ConvertToString(value) }");
Console.WriteLine();
Console.ForegroundColor = ConsoleColor.White;
Console.WriteLine($"Try Rollback Transaction 2");
IsTransactionSuccesful(transaction.RollBack()); //will auto dispose with no commit at end of using
}
Console.ForegroundColor = ConsoleColor.Green;
var val = scope.CurrentStore.Get("a");
Console.WriteLine($"The value for key A is { ConvertToString(val) }");
Console.WriteLine();
Console.ForegroundColor = ConsoleColor.White;
Console.WriteLine($"Try Commit Transaction");
IsTransactionSuccesful(scope.Committed());
}
var transActionResult = mainDictionary.Get("a");
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine($"The value for key A is { ConvertToString(transActionResult) }");
Console.WriteLine();
Console.ForegroundColor = ConsoleColor.White;
Console.BackgroundColor = ConsoleColor.Black;
Console.WriteLine("===================================================");
Console.WriteLine("===================================================");
Console.WriteLine();
#endregion
#region November
//Console.WriteLine("===================================================");
//Console.WriteLine("Key Value Store Transaction");
//Console.WriteLine("===================================================");
//Console.WriteLine();
//var mainDictionary = new KeyValueStore<string, int>();
//using (var scope = new TransactionService<string, int>(mainDictionary))
//{
// Console.ForegroundColor = ConsoleColor.White;
// Console.WriteLine("Set a keyvalue pair with Key==A and Value==20");
// Console.WriteLine();
// scope.CurrentStore?.Set("a", 20);
// Console.ForegroundColor = ConsoleColor.White;
// Console.WriteLine($"Try Commit Transaction");
// IsTransactionSuccesful(scope.Committed());
//}
#endregion
Console.ReadKey();
}
/// <summary>
/// Deletes the specified key-value item.
/// </summary>
/// <param name="nameSpace"></param>
/// <param name="key"></param>
/// <returns></returns>
public bool Delete(string nameSpace, string key)
{
string nameSpaceKey = string.Format(keyFormat, nameSpace, key);
return(KeyValueStore.Delete(nameSpaceKey));
}