CSharpTest.Net.Collections

CSharpTest.Net.Collections (moved from https://code.google.com/p/csharptest-net/)

Change Log

2014-09-06 Initial clone and extraction from existing library.

Online Help

BPlusTree Help: http://help.csharptest.net/?CSharpTest.Net.BPlusTree~CSharpTest.Net.Collections.BPlusTree%602.html

Quick start

LurchTable Example

//Example producer/consumer queue where producer threads help when queue is full
using (var queue = new LurchTable<string, int>(LurchTableOrder.Insertion, 100))
{
    var stop = new ManualResetEvent(false);
    queue.ItemRemoved += kv => Console.WriteLine("[{0}] - {1}", Thread.CurrentThread.ManagedThreadId, kv.Key);
    //start some threads eating queue:
    var thread = new Thread(() => { while (!stop.WaitOne(0)) queue.Dequeue(); })
        { Name = "worker", IsBackground = true };
    thread.Start();

    var names = Directory.GetFiles(Path.GetTempPath(), "*", SearchOption.AllDirectories);
    if (names.Length <= 100) throw new Exception("Not enough trash in your temp dir.");
    var loops = Math.Max(1, 10000/names.Length);
    for(int i=0; i < loops; i++)
        foreach (var name in names)
            queue[name] = i;

    stop.Set();
    thread.Join();
}

BPlusTree Example

var options = new BPlusTree<string, DateTime>.OptionsV2(PrimitiveSerializer.String, PrimitiveSerializer.DateTime);
options.CalcBTreeOrder(16, 24);
options.CreateFile = CreatePolicy.Always;
options.FileName = Path.GetTempFileName();
using (var tree = new BPlusTree<string, DateTime>(options))
{
    var tempDir = new DirectoryInfo(Path.GetTempPath());
    foreach (var file in tempDir.GetFiles("*", SearchOption.AllDirectories))
    {
        tree.Add(file.FullName, file.LastWriteTimeUtc);
    }
}
options.CreateFile = CreatePolicy.Never;
using (var tree = new BPlusTree<string, DateTime>(options))
{
    var tempDir = new DirectoryInfo(Path.GetTempPath());
    foreach (var file in tempDir.GetFiles("*", SearchOption.AllDirectories))
    {
        DateTime cmpDate;
        if (!tree.TryGetValue(file.FullName, out cmpDate))
            Console.WriteLine("New file: {0}", file.FullName);
        else if (cmpDate != file.LastWriteTimeUtc)
            Console.WriteLine("Modified: {0}", file.FullName);
        tree.Remove(file.FullName);
    }
    foreach (var item in tree)
    {
        Console.WriteLine("Removed: {0}", item.Key);
    }
}