/// <summary>
/// init
/// </summary>
/// <param name="arrNodes"></param>
public void Init(string[] arrNodes)
{
if (arrNodes == null || arrNodes.Length == 0)
{
throw new ArgumentNullException("arrNodes");
}
this._arrNodes = arrNodes.Distinct().ToArray();
this._dic.Clear();
this._keys = null;
var listKeys = new List <uint>();
foreach (var node in arrNodes)
{
for (int i = 0; i < 250; i++)
{
var key = ModifiedFNV1_32.GetHashCode(Encoding.UTF8.GetBytes(string.Concat(node, "-", i.ToString())));
if (this._dic.ContainsKey(key))
{
continue;
}
this._dic[key] = node;
listKeys.Add(key);
}
}
listKeys.Sort();
this._keys = listKeys.ToArray();
}
/// <summary>
/// calc
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public string GetNode(string key)
{
if (key == null)
{
throw new ArgumentNullException("key");
}
var hash = ModifiedFNV1_32.GetHashCode(Encoding.UTF8.GetBytes(key));
return(this._arrNodes[hash % this._arrNodes.Length]);
}
/// <summary>
/// calc
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public string GetNode(string key)
{
if (key == null)
{
throw new ArgumentNullException("key");
}
var i = Array.BinarySearch(this._keys, ModifiedFNV1_32.GetHashCode(Encoding.UTF8.GetBytes(key)));
if (i < 0)
{
i = ~i;
if (i >= this._keys.Length)
{
i = 0;
}
}
return(this._dic[this._keys[i]]);
}
