public void TestEnumeration()
{
var options = Options;
options.BTreeOrder = 4;
using (BPlusTree <int, string> data = new BPlusTree <int, string>(options))
{
data.EnableCount();
data.DebugSetOutput(new StringWriter());
data.DebugSetValidateOnCheckpoint(true);
for (int id = 0; id < 10; id++)
{
data.Add(id, id.ToString());
}
using (IEnumerator <KeyValuePair <int, string> > enu = data.GetEnumerator())
{
Assert.IsTrue(enu.MoveNext());
Assert.AreEqual(0, enu.Current.Key);
for (int id = 2; id < 10; id++)
{
Assert.IsTrue(data.Remove(id));
}
for (int id = 6; id < 11; id++)
{
data.Add(id, id.ToString());
}
Assert.IsTrue(enu.MoveNext());
Assert.AreEqual(1, enu.Current.Key);
Assert.IsTrue(enu.MoveNext());
Assert.AreEqual(6, enu.Current.Key);
Assert.IsTrue(enu.MoveNext());
Assert.AreEqual(7, enu.Current.Key);
Assert.IsTrue(data.Remove(8));
Assert.IsTrue(data.Remove(9));
Assert.IsTrue(data.Remove(10));
data.Add(11, 11.ToString());
Assert.IsTrue(enu.MoveNext());
Assert.AreEqual(11, enu.Current.Key);
Assert.IsTrue(false == enu.MoveNext());
}
data.Clear();
}
}
public override void Initialize()
{
if (!Directory.Exists(path.Path))
{
Directory.CreateDirectory(path.Path);
}
//string indexFileName = path.CreatePath ("index").Path;
string blockFileName = path.CreatePath(name).Path;
Console.WriteLine("Name: {0}", name);
//Console.WriteLine ("Index: {0}", indexFileName);
Console.WriteLine("Block: {0}", blockFileName);
//bool indexExists = File.Exists (indexFileName);
bool blockExists = File.Exists(blockFileName);
options = new BPlusTree <byte[], long> .OptionsV2(BytesSerializer.RawBytes, PrimitiveSerializer.Int64);
options.KeyComparer = ByteSequenceComparer.Shared;
options.StorageType = StorageType.Memory;
index = new BPlusTree <byte[], long> (options);
index.DebugSetOutput(Console.Out);
Console.WriteLine("Count: {0}", index.Count);
Console.WriteLine();
fs = File.Open(blockFileName, FileMode.OpenOrCreate);
if ((capacity = fs.Length) == 0)
{
fs.SetLength(capacity = 0x110000);
}
fs.Close();
mmfBlock = MemoryMappedFile.CreateFromFile(blockFileName, FileMode.Open);
maMeta = mmfBlock.CreateViewAccessor(0, reservedBytes, MemoryMappedFileAccess.ReadWrite);
if (!blockExists)
{
mh.MAGIC = 0x88DFB78311EFF07A;
mh.WriteOffset = 0;
mh.GrowRate = 0x100000;
maMeta.Write <MetaHeader> (0, ref mh);
}
else
{
maMeta.Read <MetaHeader> (0, out mh);
if (mh.MAGIC != 0x88DFB78311EFF07A)
{
throw new InvalidDataException("file magic doesn't match.");
}
}
CreateIndex();
}
